Data Preview 0.1 Schema

Data Preview 0.1 includes five tables based on the DESC’s Data Challenge 2 simulation of 300 square degrees of the wide-fast-deep LSST survey region after 5 years. All tables contain objects detected in coadded images.

position

Select astrometry-related parameters for objects detected in the coadded images, such as coordinates, footprints, patch/tract information, and deblending parameters. (29 columns)

Column Name Data Type Unit Description [UCD]
objectId long Unique id.
coord_ra double RA-coordinate [pos.eq.ra]
coord_dec double Decl-coordinate [pos.eq.dec]
parent long unique ID of parent source
deblend_nChild int Number of children this object has (defaults to 0)
detect_isPrimary boolean true if source has no children and is in the inner region of a coadd patch and is in the inner region of a coadd tract and is not "detected" in a pseudo-filter (see config.pseudoFilterList)
extinction_bv double mag Milky Way dust extinction, E(B-V)
detect_isPatchInner boolean true if source is in the inner region of a coadd patch
detect_isTractInner boolean true if source is in the inner region of a coadd tract
merge_footprint_i boolean Detection footprint overlapped with a detection from filter i
merge_footprint_r boolean Detection footprint overlapped with a detection from filter r
merge_footprint_z boolean Detection footprint overlapped with a detection from filter z
merge_footprint_y boolean Detection footprint overlapped with a detection from filter y
merge_footprint_g boolean Detection footprint overlapped with a detection from filter g
merge_footprint_u boolean Detection footprint overlapped with a detection from filter u
merge_footprint_sky boolean Detection footprint overlapped with a detection from filter sky
merge_peak_i boolean Peak detected in filter i
merge_peak_r boolean Peak detected in filter r
merge_peak_z boolean Peak detected in filter z
merge_peak_y boolean Peak detected in filter y
merge_peak_g boolean Peak detected in filter g
merge_peak_u boolean Peak detected in filter u
merge_peak_sky boolean Peak detected in filter sky
merge_measurement_i boolean Flag field set if the measurements here are from the i filter
merge_measurement_r boolean Flag field set if the measurements here are from the r filter
merge_measurement_z boolean Flag field set if the measurements here are from the z filter
merge_measurement_y boolean Flag field set if the measurements here are from the y filter
merge_measurement_g boolean Flag field set if the measurements here are from the g filter
merge_measurement_u boolean Flag field set if the measurements here are from the u filter

reference

Measurements for objects detected in the coadded images, including photometry, astrometry, shape, deblending, model fits, and related background and flag parameters. This table joined with the position table is very similar to the object table, but with additional columns. (236 columns)

Column Name Data Type Unit Description [UCD]
objectId long Unique id.
coord_ra double position in ra/dec [pos.eq.ra]
coord_dec double position in ra/dec [pos.eq.dec]
base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
base_SdssCentroid_flag boolean General Failure Flag
base_SdssCentroid_flag_edge boolean Object too close to edge
base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
base_PsfFlux_area double pixel effective area of PSF
base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
base_PsfFlux_flag boolean General Failure Flag
base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
base_PsfFlux_flag_badCentroid boolean General Failure Flag
base_Blendedness_raw_instFlux double measure of how instFlux is affected by neighbors: (1 - instFlux.child/instFlux.parent)
base_Blendedness_raw_instFlux_child double count instFlux of the child, measured with a Gaussian weight matched to the child
base_Blendedness_raw_instFlux_parent double count instFlux of the parent, measured with a Gaussian weight matched to the child
base_Blendedness_abs_instFlux double measure of how instFlux is affected by neighbors: (1 - instFlux.child/instFlux.parent)
base_Blendedness_abs_instFlux_child double count instFlux of the child, measured with a Gaussian weight matched to the child
base_Blendedness_abs_instFlux_parent double count instFlux of the parent, measured with a Gaussian weight matched to the child
base_Blendedness_raw_child_xx double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_raw_child_yy double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_raw_child_xy double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_raw_parent_xx double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_raw_parent_yy double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_raw_parent_xy double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the "raw" pixel values.
base_Blendedness_abs_child_xx double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_abs_child_yy double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_abs_child_xy double pixel**2 Shape of the child, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_abs_parent_xx double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_abs_parent_yy double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_abs_parent_xy double pixel**2 Shape of the parent, measured with a Gaussian weight matched to the child. Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
base_Blendedness_old double Blendedness from dot products: (child.dot(parent)/child.dot(child) - 1)
base_Blendedness_abs double Measure of how much the flux is affected by neighbors: (1 - child_instFlux/parent_instFlux). Operates on the absolute value of the pixels to try to obtain a "de-noised" value. See section 4.9.11 of Bosch et al. 2018, PASJ, 70, S5 for details.
base_Blendedness_flag boolean General Failure Flag
base_Blendedness_flag_noCentroid boolean Object has no centroid
base_Blendedness_flag_noShape boolean Object has no shape
base_PixelFlags_flag boolean General failure flag, set if anything went wrong
base_PixelFlags_flag_offimage boolean Source center is off image
base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
good boolean True if the source has no flagged pixels.
ext_shapeHSM_HsmSourceMoments_x double pixel HSM Centroid
ext_shapeHSM_HsmSourceMoments_y double pixel HSM Centroid
ext_shapeHSM_HsmSourceMoments_xx double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMoments_yy double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMoments_xy double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMoments_flag boolean general failure flag, set if anything went wrong
ext_shapeHSM_HsmSourceMoments_flag_no_pixels boolean no pixels to measure
ext_shapeHSM_HsmSourceMoments_flag_not_contained boolean center not contained in footprint bounding box
ext_shapeHSM_HsmSourceMoments_flag_parent_source boolean parent source, ignored
ext_shapeHSM_HsmSourceMoments_flag_badCentroid boolean General Failure Flag
ext_shapeHSM_HsmPsfMoments_x double pixel HSM Centroid
ext_shapeHSM_HsmPsfMoments_y double pixel HSM Centroid
ext_shapeHSM_HsmPsfMoments_xx double pixel**2 HSM moments
ext_shapeHSM_HsmPsfMoments_yy double pixel**2 HSM moments
ext_shapeHSM_HsmPsfMoments_xy double pixel**2 HSM moments
ext_shapeHSM_HsmShapeRegauss_e1 double PSF-corrected shear using Hirata & Seljak (2003) "regaussianization"
ext_shapeHSM_HsmShapeRegauss_e2 double PSF-corrected shear using Hirata & Seljak (2003) "regaussianization"
ext_shapeHSM_HsmShapeRegauss_sigma double PSF-corrected shear using Hirata & Seljak (2003) "regaussianization"
ext_shapeHSM_HsmShapeRegauss_resolution double resolution factor (0=unresolved, 1=resolved)
ext_shapeHSM_HsmSourceMomentsRound_x double pixel HSM Centroid
ext_shapeHSM_HsmSourceMomentsRound_y double pixel HSM Centroid
ext_shapeHSM_HsmSourceMomentsRound_xx double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMomentsRound_yy double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMomentsRound_xy double pixel**2 HSM moments
ext_shapeHSM_HsmSourceMomentsRound_Flux double HSM flux
ext_shapeHSM_HsmPsfMoments_flag boolean general failure flag, set if anything went wrong
ext_shapeHSM_HsmPsfMoments_flag_no_pixels boolean no pixels to measure
ext_shapeHSM_HsmPsfMoments_flag_not_contained boolean center not contained in footprint bounding box
ext_shapeHSM_HsmPsfMoments_flag_parent_source boolean parent source, ignored
ext_shapeHSM_HsmShapeRegauss_flag boolean general failure flag, set if anything went wrong
ext_shapeHSM_HsmShapeRegauss_flag_no_pixels boolean no pixels to measure
ext_shapeHSM_HsmShapeRegauss_flag_not_contained boolean center not contained in footprint bounding box
ext_shapeHSM_HsmShapeRegauss_flag_parent_source boolean parent source, ignored
ext_shapeHSM_HsmShapeRegauss_flag_galsim boolean GalSim failure
ext_shapeHSM_HsmSourceMomentsRound_flag boolean general failure flag, set if anything went wrong
ext_shapeHSM_HsmSourceMomentsRound_flag_no_pixels boolean no pixels to measure
ext_shapeHSM_HsmSourceMomentsRound_flag_not_contained boolean center not contained in footprint bounding box
ext_shapeHSM_HsmSourceMomentsRound_flag_parent_source boolean parent source, ignored
ext_shapeHSM_HsmPsfMoments_flag_badCentroid boolean General Failure Flag
ext_shapeHSM_HsmShapeRegauss_flag_badCentroid boolean General Failure Flag
ext_shapeHSM_HsmSourceMomentsRound_flag_badCentroid boolean General Failure Flag
base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
base_SdssShape_x double pixel elliptical Gaussian adaptive moments
base_SdssShape_y double pixel elliptical Gaussian adaptive moments
base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
base_SdssShape_flag boolean General Failure Flag
base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
base_SdssShape_flag_badCentroid boolean General Failure Flag
deblend_psfCenter_x double pixel If deblended-as-psf, the PSF centroid
deblend_psfCenter_y double pixel If deblended-as-psf, the PSF centroid
deblend_psf_instFlux double count If deblended-as-psf, the instrumental PSF flux
deblend_deblendedAsPsf boolean Deblender thought this source looked like a PSF
deblend_tooManyPeaks boolean Source had too many peaks; only the brightest were included
deblend_parentTooBig boolean Parent footprint covered too many pixels
deblend_masked boolean Parent footprint was predominantly masked
deblend_skipped boolean Deblender skipped this source
deblend_rampedTemplate boolean This source was near an image edge and the deblender used "ramp" edge-handling.
deblend_patchedTemplate boolean This source was near an image edge and the deblender used "patched" edge-handling.
deblend_hasStrayFlux boolean This source was assigned some stray flux
deblend_psfflux double count If deblended-as-psf, the instrumental PSF flux
modelfit_CModel_initial_instFlux double count flux from the initial fit
modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
modelfit_CModel_initial_ellipse_xx double pixel**2 half-light ellipse of the initial fit
modelfit_CModel_initial_ellipse_yy double pixel**2 half-light ellipse of the initial fit
modelfit_CModel_initial_ellipse_xy double pixel**2 half-light ellipse of the initial fit
modelfit_CModel_initial_objective double -ln(likelihood*prior) at best-fit point for the initial fit
modelfit_CModel_initial_nonlinear_0 double nonlinear parameters for the initial fit
modelfit_CModel_initial_nonlinear_1 double nonlinear parameters for the initial fit
modelfit_CModel_initial_nonlinear_2 double nonlinear parameters for the initial fit
modelfit_CModel_initial_fixed_0 double fixed parameters for the initial fit
modelfit_CModel_initial_fixed_1 double fixed parameters for the initial fit
modelfit_CModel_initial_nIter int Number of total iterations in stage
modelfit_CModel_initial_time double s Time spent in stage
modelfit_CModel_exp_instFlux double count flux from the exponential fit
modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
modelfit_CModel_exp_ellipse_xx double pixel**2 half-light ellipse of the exponential fit
modelfit_CModel_exp_ellipse_yy double pixel**2 half-light ellipse of the exponential fit
modelfit_CModel_exp_ellipse_xy double pixel**2 half-light ellipse of the exponential fit
modelfit_CModel_exp_objective double -ln(likelihood*prior) at best-fit point for the exponential fit
modelfit_CModel_exp_nonlinear_0 double nonlinear parameters for the exponential fit
modelfit_CModel_exp_nonlinear_1 double nonlinear parameters for the exponential fit
modelfit_CModel_exp_nonlinear_2 double nonlinear parameters for the exponential fit
modelfit_CModel_exp_fixed_0 double fixed parameters for the exponential fit
modelfit_CModel_exp_fixed_1 double fixed parameters for the exponential fit
modelfit_CModel_exp_nIter int Number of total iterations in stage
modelfit_CModel_exp_time double s Time spent in stage
modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
modelfit_CModel_dev_ellipse_xx double pixel**2 half-light ellipse of the de Vaucouleur fit
modelfit_CModel_dev_ellipse_yy double pixel**2 half-light ellipse of the de Vaucouleur fit
modelfit_CModel_dev_ellipse_xy double pixel**2 half-light ellipse of the de Vaucouleur fit
modelfit_CModel_dev_objective double -ln(likelihood*prior) at best-fit point for the de Vaucouleur fit
modelfit_CModel_dev_nonlinear_0 double nonlinear parameters for the de Vaucouleur fit
modelfit_CModel_dev_nonlinear_1 double nonlinear parameters for the de Vaucouleur fit
modelfit_CModel_dev_nonlinear_2 double nonlinear parameters for the de Vaucouleur fit
modelfit_CModel_dev_fixed_0 double fixed parameters for the de Vaucouleur fit
modelfit_CModel_dev_fixed_1 double fixed parameters for the de Vaucouleur fit
modelfit_CModel_dev_nIter int Number of total iterations in stage
modelfit_CModel_dev_time double s Time spent in stage
modelfit_CModel_instFlux double count flux from the final cmodel fit
modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
modelfit_CModel_ellipse_xx double pixel**2 fracDev-weighted average of exp.ellipse and dev.ellipse
modelfit_CModel_ellipse_yy double pixel**2 fracDev-weighted average of exp.ellipse and dev.ellipse
modelfit_CModel_ellipse_xy double pixel**2 fracDev-weighted average of exp.ellipse and dev.ellipse
modelfit_CModel_region_initial_ellipse_xx double pixel**2 ellipse used to set the pixel region for the initial fit (before applying bad pixel mask)
modelfit_CModel_region_initial_ellipse_yy double pixel**2 ellipse used to set the pixel region for the initial fit (before applying bad pixel mask)
modelfit_CModel_region_initial_ellipse_xy double pixel**2 ellipse used to set the pixel region for the initial fit (before applying bad pixel mask)
modelfit_CModel_region_final_ellipse_xx double pixel**2 ellipse used to set the pixel region for the final fit (before applying bad pixel mask)
modelfit_CModel_region_final_ellipse_yy double pixel**2 ellipse used to set the pixel region for the final fit (before applying bad pixel mask)
modelfit_CModel_region_final_ellipse_xy double pixel**2 ellipse used to set the pixel region for the final fit (before applying bad pixel mask)
modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
modelfit_CModel_initial_flag_trSmall boolean the optimizer converged because the trust radius became too small; this is a less-secure result than when the gradient is below the threshold, but usually not a problem
modelfit_CModel_initial_flag_maxIter boolean the optimizer hit the maximum number of iterations and did not converge
modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
modelfit_CModel_exp_flag_trSmall boolean the optimizer converged because the trust radius became too small; this is a less-secure result than when the gradient is below the threshold, but usually not a problem
modelfit_CModel_exp_flag_maxIter boolean the optimizer hit the maximum number of iterations and did not converge
modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
modelfit_CModel_dev_flag_trSmall boolean the optimizer converged because the trust radius became too small; this is a less-secure result than when the gradient is below the threshold, but usually not a problem
modelfit_CModel_dev_flag_maxIter boolean the optimizer hit the maximum number of iterations and did not converge
modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
modelfit_CModel_flags_region_usedFootprintArea boolean the pixel region for the initial fit was defined by the area of the Footprint
modelfit_CModel_flags_region_usedPsfArea boolean the pixel region for the initial fit was set to a fixed factor of the PSF area
modelfit_CModel_flags_region_usedInitialEllipseMin boolean the pixel region for the final fit was set to the lower bound defined by the initial fit
modelfit_CModel_flags_region_usedInitialEllipseMax boolean the pixel region for the final fit was set to the upper bound defined by the initial fit
modelfit_CModel_flag_noShape boolean the shape slot needed to initialize the parameters failed or was not defined
modelfit_CModel_flags_smallShape boolean initial parameter guess resulted in negative radius; used minimum of 0.100000 pixels instead.
modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel

forced_photometry

Forced photometry measurements for objects detected in the coadded images, at the locations defined by the position table. (747 columns)

Column Name Data Type Unit Description [UCD]
objectId long Unique id.
coord_ra double position in ra/dec [pos.eq.ra]
coord_dec double position in ra/dec [pos.eq.dec]
g_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
g_base_PixelFlags_flag_offimage boolean Source center is off image
g_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
g_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
g_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
g_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
g_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
g_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
g_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
g_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
g_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
g_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
g_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
g_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
g_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
g_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
g_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
g_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
g_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
g_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
g_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
g_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
g_good boolean True if the source has no flagged pixels.
g_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
g_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
g_modelfit_CModel_instFlux double count flux from the final cmodel fit
g_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
g_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
g_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
g_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
g_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
g_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
g_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
g_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
g_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
g_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
g_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
g_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
g_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
g_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
g_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
g_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
g_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
g_base_SdssCentroid_flag boolean General Failure Flag
g_base_SdssCentroid_flag_edge boolean Object too close to edge
g_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
g_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
g_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
g_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
g_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
g_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
g_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
g_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
g_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
g_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
g_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
g_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
g_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
g_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
g_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
g_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
g_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
g_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
g_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
g_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
g_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
g_base_SdssShape_flag boolean General Failure Flag
g_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
g_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
g_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
g_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
g_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
g_base_SdssShape_flag_badCentroid boolean General Failure Flag
g_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
g_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
g_base_PsfFlux_area double pixel effective area of PSF
g_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
g_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
g_base_PsfFlux_flag boolean General Failure Flag
g_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
g_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
g_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
g_base_PsfFlux_flag_badCentroid boolean General Failure Flag
g_base_InputCount_value int Number of images contributing at center, not including anyclipping
g_base_InputCount_flag boolean Set for any fatal failure
g_base_InputCount_flag_noInputs boolean No coadd inputs available
g_base_InputCount_flag_badCentroid boolean General Failure Flag
g_base_Variance_value double Variance at object position
g_base_Variance_flag boolean Set for any fatal failure
g_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
g_base_Variance_flag_badCentroid boolean General Failure Flag
g_base_LocalBackground_instFlux double count background in annulus around source
g_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
g_base_LocalBackground_flag boolean General Failure Flag
g_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
g_base_LocalBackground_flag_noPsf boolean no PSF provided
g_base_LocalBackground_flag_badCentroid boolean General Failure Flag
g_modelfit_CModel_initial_instFlux double count flux from the initial fit
g_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
g_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
g_modelfit_CModel_exp_instFlux double count flux from the exponential fit
g_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
g_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
g_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
g_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
g_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
g_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
g_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
g_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
g_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
g_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
g_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
g_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
g_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
g_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
g_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
g_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
g_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
g_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
g_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
g_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
g_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
g_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
g_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
i_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
i_base_PixelFlags_flag_offimage boolean Source center is off image
i_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
i_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
i_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
i_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
i_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
i_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
i_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
i_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
i_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
i_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
i_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
i_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
i_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
i_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
i_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
i_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
i_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
i_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
i_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
i_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
i_good boolean True if the source has no flagged pixels.
i_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
i_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
i_modelfit_CModel_instFlux double count flux from the final cmodel fit
i_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
i_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
i_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
i_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
i_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
i_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
i_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
i_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
i_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
i_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
i_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
i_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
i_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
i_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
i_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
i_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
i_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
i_base_SdssCentroid_flag boolean General Failure Flag
i_base_SdssCentroid_flag_edge boolean Object too close to edge
i_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
i_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
i_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
i_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
i_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
i_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
i_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
i_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
i_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
i_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
i_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
i_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
i_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
i_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
i_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
i_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
i_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
i_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
i_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
i_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
i_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
i_base_SdssShape_flag boolean General Failure Flag
i_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
i_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
i_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
i_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
i_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
i_base_SdssShape_flag_badCentroid boolean General Failure Flag
i_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
i_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
i_base_PsfFlux_area double pixel effective area of PSF
i_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
i_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
i_base_PsfFlux_flag boolean General Failure Flag
i_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
i_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
i_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
i_base_PsfFlux_flag_badCentroid boolean General Failure Flag
i_base_InputCount_value int Number of images contributing at center, not including anyclipping
i_base_InputCount_flag boolean Set for any fatal failure
i_base_InputCount_flag_noInputs boolean No coadd inputs available
i_base_InputCount_flag_badCentroid boolean General Failure Flag
i_base_Variance_value double Variance at object position
i_base_Variance_flag boolean Set for any fatal failure
i_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
i_base_Variance_flag_badCentroid boolean General Failure Flag
i_base_LocalBackground_instFlux double count background in annulus around source
i_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
i_base_LocalBackground_flag boolean General Failure Flag
i_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
i_base_LocalBackground_flag_noPsf boolean no PSF provided
i_base_LocalBackground_flag_badCentroid boolean General Failure Flag
i_modelfit_CModel_initial_instFlux double count flux from the initial fit
i_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
i_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
i_modelfit_CModel_exp_instFlux double count flux from the exponential fit
i_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
i_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
i_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
i_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
i_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
i_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
i_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
i_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
i_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
i_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
i_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
i_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
i_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
i_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
i_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
i_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
i_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
i_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
i_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
i_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
i_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
i_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
i_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
r_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
r_base_PixelFlags_flag_offimage boolean Source center is off image
r_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
r_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
r_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
r_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
r_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
r_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
r_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
r_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
r_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
r_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
r_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
r_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
r_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
r_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
r_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
r_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
r_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
r_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
r_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
r_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
r_good boolean True if the source has no flagged pixels.
r_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
r_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
r_modelfit_CModel_instFlux double count flux from the final cmodel fit
r_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
r_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
r_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
r_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
r_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
r_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
r_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
r_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
r_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
r_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
r_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
r_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
r_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
r_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
r_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
r_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
r_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
r_base_SdssCentroid_flag boolean General Failure Flag
r_base_SdssCentroid_flag_edge boolean Object too close to edge
r_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
r_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
r_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
r_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
r_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
r_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
r_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
r_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
r_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
r_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
r_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
r_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
r_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
r_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
r_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
r_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
r_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
r_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
r_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
r_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
r_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
r_base_SdssShape_flag boolean General Failure Flag
r_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
r_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
r_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
r_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
r_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
r_base_SdssShape_flag_badCentroid boolean General Failure Flag
r_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
r_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
r_base_PsfFlux_area double pixel effective area of PSF
r_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
r_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
r_base_PsfFlux_flag boolean General Failure Flag
r_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
r_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
r_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
r_base_PsfFlux_flag_badCentroid boolean General Failure Flag
r_base_InputCount_value int Number of images contributing at center, not including anyclipping
r_base_InputCount_flag boolean Set for any fatal failure
r_base_InputCount_flag_noInputs boolean No coadd inputs available
r_base_InputCount_flag_badCentroid boolean General Failure Flag
r_base_Variance_value double Variance at object position
r_base_Variance_flag boolean Set for any fatal failure
r_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
r_base_Variance_flag_badCentroid boolean General Failure Flag
r_base_LocalBackground_instFlux double count background in annulus around source
r_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
r_base_LocalBackground_flag boolean General Failure Flag
r_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
r_base_LocalBackground_flag_noPsf boolean no PSF provided
r_base_LocalBackground_flag_badCentroid boolean General Failure Flag
r_modelfit_CModel_initial_instFlux double count flux from the initial fit
r_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
r_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
r_modelfit_CModel_exp_instFlux double count flux from the exponential fit
r_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
r_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
r_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
r_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
r_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
r_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
r_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
r_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
r_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
r_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
r_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
r_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
r_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
r_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
r_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
r_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
r_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
r_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
r_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
r_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
r_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
r_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
r_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
u_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
u_base_PixelFlags_flag_offimage boolean Source center is off image
u_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
u_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
u_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
u_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
u_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
u_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
u_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
u_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
u_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
u_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
u_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
u_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
u_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
u_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
u_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
u_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
u_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
u_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
u_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
u_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
u_good boolean True if the source has no flagged pixels.
u_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
u_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
u_modelfit_CModel_instFlux double count flux from the final cmodel fit
u_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
u_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
u_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
u_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
u_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
u_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
u_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
u_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
u_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
u_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
u_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
u_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
u_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
u_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
u_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
u_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
u_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
u_base_SdssCentroid_flag boolean General Failure Flag
u_base_SdssCentroid_flag_edge boolean Object too close to edge
u_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
u_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
u_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
u_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
u_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
u_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
u_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
u_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
u_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
u_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
u_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
u_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
u_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
u_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
u_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
u_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
u_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
u_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
u_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
u_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
u_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
u_base_SdssShape_flag boolean General Failure Flag
u_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
u_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
u_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
u_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
u_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
u_base_SdssShape_flag_badCentroid boolean General Failure Flag
u_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
u_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
u_base_PsfFlux_area double pixel effective area of PSF
u_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
u_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
u_base_PsfFlux_flag boolean General Failure Flag
u_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
u_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
u_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
u_base_PsfFlux_flag_badCentroid boolean General Failure Flag
u_base_InputCount_value int Number of images contributing at center, not including anyclipping
u_base_InputCount_flag boolean Set for any fatal failure
u_base_InputCount_flag_noInputs boolean No coadd inputs available
u_base_InputCount_flag_badCentroid boolean General Failure Flag
u_base_Variance_value double Variance at object position
u_base_Variance_flag boolean Set for any fatal failure
u_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
u_base_Variance_flag_badCentroid boolean General Failure Flag
u_base_LocalBackground_instFlux double count background in annulus around source
u_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
u_base_LocalBackground_flag boolean General Failure Flag
u_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
u_base_LocalBackground_flag_noPsf boolean no PSF provided
u_base_LocalBackground_flag_badCentroid boolean General Failure Flag
u_modelfit_CModel_initial_instFlux double count flux from the initial fit
u_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
u_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
u_modelfit_CModel_exp_instFlux double count flux from the exponential fit
u_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
u_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
u_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
u_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
u_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
u_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
u_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
u_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
u_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
u_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
u_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
u_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
u_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
u_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
u_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
u_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
u_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
u_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
u_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
u_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
u_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
u_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
u_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
y_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
y_base_PixelFlags_flag_offimage boolean Source center is off image
y_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
y_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
y_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
y_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
y_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
y_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
y_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
y_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
y_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
y_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
y_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
y_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
y_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
y_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
y_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
y_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
y_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
y_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
y_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
y_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
y_good boolean True if the source has no flagged pixels.
y_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
y_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
y_modelfit_CModel_instFlux double count flux from the final cmodel fit
y_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
y_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
y_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
y_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
y_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
y_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
y_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
y_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
y_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
y_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
y_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
y_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
y_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
y_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
y_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
y_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
y_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
y_base_SdssCentroid_flag boolean General Failure Flag
y_base_SdssCentroid_flag_edge boolean Object too close to edge
y_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
y_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
y_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
y_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
y_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
y_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
y_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
y_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
y_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
y_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
y_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
y_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
y_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
y_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
y_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
y_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
y_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
y_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
y_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
y_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
y_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
y_base_SdssShape_flag boolean General Failure Flag
y_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
y_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
y_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
y_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
y_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
y_base_SdssShape_flag_badCentroid boolean General Failure Flag
y_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
y_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
y_base_PsfFlux_area double pixel effective area of PSF
y_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
y_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
y_base_PsfFlux_flag boolean General Failure Flag
y_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
y_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
y_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
y_base_PsfFlux_flag_badCentroid boolean General Failure Flag
y_base_InputCount_value int Number of images contributing at center, not including anyclipping
y_base_InputCount_flag boolean Set for any fatal failure
y_base_InputCount_flag_noInputs boolean No coadd inputs available
y_base_InputCount_flag_badCentroid boolean General Failure Flag
y_base_Variance_value double Variance at object position
y_base_Variance_flag boolean Set for any fatal failure
y_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
y_base_Variance_flag_badCentroid boolean General Failure Flag
y_base_LocalBackground_instFlux double count background in annulus around source
y_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
y_base_LocalBackground_flag boolean General Failure Flag
y_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
y_base_LocalBackground_flag_noPsf boolean no PSF provided
y_base_LocalBackground_flag_badCentroid boolean General Failure Flag
y_modelfit_CModel_initial_instFlux double count flux from the initial fit
y_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
y_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
y_modelfit_CModel_exp_instFlux double count flux from the exponential fit
y_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
y_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
y_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
y_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
y_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
y_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
y_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
y_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
y_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
y_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
y_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
y_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
y_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
y_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
y_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
y_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
y_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
y_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
y_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
y_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
y_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
y_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
y_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial
z_base_PixelFlags_flag boolean General failure flag, set if anything went wrong
z_base_PixelFlags_flag_offimage boolean Source center is off image
z_base_PixelFlags_flag_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA)
z_base_PixelFlags_flag_interpolated boolean Interpolated pixel in the Source footprint
z_base_PixelFlags_flag_saturated boolean Saturated pixel in the Source footprint
z_base_PixelFlags_flag_cr boolean Cosmic ray in the Source footprint
z_base_PixelFlags_flag_bad boolean Bad pixel in the Source footprint
z_base_PixelFlags_flag_suspect boolean Source's footprint includes suspect pixels
z_base_PixelFlags_flag_interpolatedCenter boolean Interpolated pixel in the Source center
z_base_PixelFlags_flag_saturatedCenter boolean Saturated pixel in the Source center
z_base_PixelFlags_flag_crCenter boolean Cosmic ray in the Source center
z_base_PixelFlags_flag_suspectCenter boolean Source's center is close to suspect pixels
z_base_PixelFlags_flag_clippedCenter boolean Source center is close to CLIPPED pixels
z_base_PixelFlags_flag_sensor_edgeCenter boolean Source center is close to SENSOR_EDGE pixels
z_base_PixelFlags_flag_rejectedCenter boolean Source center is close to REJECTED pixels
z_base_PixelFlags_flag_inexact_psfCenter boolean Source center is close to INEXACT_PSF pixels
z_base_PixelFlags_flag_bright_objectCenter boolean Source center is close to BRIGHT_OBJECT pixels
z_base_PixelFlags_flag_clipped boolean Source footprint includes CLIPPED pixels
z_base_PixelFlags_flag_sensor_edge boolean Source footprint includes SENSOR_EDGE pixels
z_base_PixelFlags_flag_rejected boolean Source footprint includes REJECTED pixels
z_base_PixelFlags_flag_inexact_psf boolean Source footprint includes INEXACT_PSF pixels
z_base_PixelFlags_flag_bright_object boolean Source footprint includes BRIGHT_OBJECT pixels
z_good boolean True if the source has no flagged pixels.
z_base_ClassificationExtendedness_value double Set to 1 for extended sources, 0 for point sources.
z_base_ClassificationExtendedness_flag boolean Set to 1 for any fatal failure.
z_modelfit_CModel_instFlux double count flux from the final cmodel fit
z_modelfit_CModel_instFluxErr double count flux uncertainty from the final cmodel fit
z_modelfit_CModel_instFlux_inner double count flux within the fit region, with no extrapolation
z_modelfit_CModel_fracDev double fraction of flux in de Vaucouleur component
z_modelfit_CModel_objective double -ln(likelihood) (chi^2) in cmodel fit
z_modelfit_CModel_apCorr double aperture correction applied to modelfit_CModel
z_modelfit_CModel_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel
z_modelfit_CModel_flag boolean flag set if the final cmodel fit (or any previous fit) failed
z_modelfit_CModel_flag_region_maxArea boolean number of pixels in fit region exceeded the region.maxArea value
z_modelfit_CModel_flag_region_maxBadPixelFraction boolean the fraction of bad/clipped pixels in the fit region exceeded region.maxBadPixelFraction
z_modelfit_CModel_flag_badReference boolean The original fit in the reference catalog failed.
z_modelfit_CModel_flag_noShapeletPsf boolean the multishapelet fit to the PSF model did not succeed
z_modelfit_CModel_flag_badCentroid boolean input centroid was not within the fit region (probably because it''s not within the Footprint)
z_modelfit_CModel_flag_apCorr boolean set if unable to aperture correct modelfit_CModel
z_base_SdssCentroid_x double pixel centroid from Sdss Centroid algorithm
z_base_SdssCentroid_y double pixel centroid from Sdss Centroid algorithm
z_base_SdssCentroid_xErr double pixel 1-sigma uncertainty on x position
z_base_SdssCentroid_yErr double pixel 1-sigma uncertainty on y position
z_base_SdssCentroid_flag boolean General Failure Flag
z_base_SdssCentroid_flag_edge boolean Object too close to edge
z_base_SdssCentroid_flag_noSecondDerivative boolean Vanishing second derivative
z_base_SdssCentroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative
z_base_SdssCentroid_flag_notAtMaximum boolean Object is not at a maximum
z_base_SdssCentroid_flag_resetToPeak boolean set if CentroidChecker reset the centroid
z_base_SdssCentroid_flag_badInitialCentroid boolean whether the reference centroid is marked as bad
z_base_SdssShape_xx double pixel**2 elliptical Gaussian adaptive moments
z_base_SdssShape_yy double pixel**2 elliptical Gaussian adaptive moments
z_base_SdssShape_xy double pixel**2 elliptical Gaussian adaptive moments
z_base_SdssShape_xxErr double pixel**2 Standard deviation of xx moment
z_base_SdssShape_yyErr double pixel**2 Standard deviation of yy moment
z_base_SdssShape_xyErr double pixel**2 Standard deviation of xy moment
z_base_SdssShape_x double pixel elliptical Gaussian adaptive moments
z_base_SdssShape_y double pixel elliptical Gaussian adaptive moments
z_base_SdssShape_instFlux double count elliptical Gaussian adaptive moments
z_base_SdssShape_instFluxErr double count 1-sigma instFlux uncertainty
z_base_SdssShape_psf_xx double pixel**2 adaptive moments of the PSF model at the object position
z_base_SdssShape_psf_yy double pixel**2 adaptive moments of the PSF model at the object position
z_base_SdssShape_psf_xy double pixel**2 adaptive moments of the PSF model at the object position
z_base_SdssShape_instFlux_xx_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xx
z_base_SdssShape_instFlux_yy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_yy
z_base_SdssShape_instFlux_xy_Cov double count.pixel**2 uncertainty covariance between base_SdssShape_instFlux and base_SdssShape_xy
z_base_SdssShape_flag boolean General Failure Flag
z_base_SdssShape_flag_unweightedBad boolean Both weighted and unweighted moments were invalid
z_base_SdssShape_flag_unweighted boolean Weighted moments converged to an invalid value; using unweighted moments
z_base_SdssShape_flag_shift boolean centroid shifted by more than the maximum allowed amount
z_base_SdssShape_flag_maxIter boolean Too many iterations in adaptive moments
z_base_SdssShape_flag_psf boolean Failure in measuring PSF model shape
z_base_SdssShape_flag_badCentroid boolean General Failure Flag
z_base_PsfFlux_instFlux double count instFlux derived from linear least-squares fit of PSF model
z_base_PsfFlux_instFluxErr double count 1-sigma instFlux uncertainty
z_base_PsfFlux_area double pixel effective area of PSF
z_base_PsfFlux_apCorr double aperture correction applied to base_PsfFlux
z_base_PsfFlux_apCorrErr double standard deviation of aperture correction applied to base_PsfFlux
z_base_PsfFlux_flag boolean General Failure Flag
z_base_PsfFlux_flag_noGoodPixels boolean not enough non-rejected pixels in data to attempt the fit
z_base_PsfFlux_flag_edge boolean object was too close to the edge of the image to use the full PSF model
z_base_PsfFlux_flag_apCorr boolean set if unable to aperture correct base_PsfFlux
z_base_PsfFlux_flag_badCentroid boolean General Failure Flag
z_base_InputCount_value int Number of images contributing at center, not including anyclipping
z_base_InputCount_flag boolean Set for any fatal failure
z_base_InputCount_flag_noInputs boolean No coadd inputs available
z_base_InputCount_flag_badCentroid boolean General Failure Flag
z_base_Variance_value double Variance at object position
z_base_Variance_flag boolean Set for any fatal failure
z_base_Variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels
z_base_Variance_flag_badCentroid boolean General Failure Flag
z_base_LocalBackground_instFlux double count background in annulus around source
z_base_LocalBackground_instFluxErr double count 1-sigma instFlux uncertainty
z_base_LocalBackground_flag boolean General Failure Flag
z_base_LocalBackground_flag_noGoodPixels boolean no good pixels in the annulus
z_base_LocalBackground_flag_noPsf boolean no PSF provided
z_base_LocalBackground_flag_badCentroid boolean General Failure Flag
z_modelfit_CModel_initial_instFlux double count flux from the initial fit
z_modelfit_CModel_initial_instFluxErr double count flux uncertainty from the initial fit
z_modelfit_CModel_initial_flux_inner double count flux from the initial fit region, with no extrapolation
z_modelfit_CModel_exp_instFlux double count flux from the exponential fit
z_modelfit_CModel_exp_instFluxErr double count flux uncertainty from the exponential fit
z_modelfit_CModel_exp_flux_inner double count flux from the exponential fit region, with no extrapolation
z_modelfit_CModel_dev_instFlux double count flux from the de Vaucouleur fit
z_modelfit_CModel_dev_instFluxErr double count flux uncertainty from the de Vaucouleur fit
z_modelfit_CModel_dev_flux_inner double count flux from the de Vaucouleur fit region, with no extrapolation
z_modelfit_CModel_exp_apCorr double aperture correction applied to modelfit_CModel_exp
z_modelfit_CModel_exp_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_exp
z_modelfit_CModel_dev_apCorr double aperture correction applied to modelfit_CModel_dev
z_modelfit_CModel_dev_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_dev
z_modelfit_CModel_initial_apCorr double aperture correction applied to modelfit_CModel_initial
z_modelfit_CModel_initial_apCorrErr double standard deviation of aperture correction applied to modelfit_CModel_initial
z_modelfit_CModel_initial_flag boolean flag set when the flux for the initial flux failed
z_modelfit_CModel_initial_flag_badReference boolean The original fit in the reference catalog failed.
z_modelfit_CModel_initial_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
z_modelfit_CModel_exp_flag boolean flag set when the flux for the exponential flux failed
z_modelfit_CModel_exp_flag_badReference boolean The original fit in the reference catalog failed.
z_modelfit_CModel_exp_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
z_modelfit_CModel_dev_flag boolean flag set when the flux for the de Vaucouleur flux failed
z_modelfit_CModel_dev_flag_badReference boolean The original fit in the reference catalog failed.
z_modelfit_CModel_dev_flag_numericError boolean numerical underflow or overflow in model evaluation; usually this means the prior was insufficient to regularize the fit, or all pixel values were zero.
z_modelfit_CModel_exp_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_exp
z_modelfit_CModel_dev_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_dev
z_modelfit_CModel_initial_flag_apCorr boolean set if unable to aperture correct modelfit_CModel_initial

object

The object table from the DESC DC2 simulated sky survey as described in arXiv:2101.04855. Includes astrometric and photometric parameters for objects detected in coadded images. (137 columns)

Column Name Data Type Unit Description [UCD]
objectId long Unique id. [meta.id;src]
parentObjectId long Id of the parent object this object has been deblended from, if any.
ra double deg RA-coordinate of the center of the object for the Point Source model. [pos.eq.ra]
dec double deg Decl-coordinate of the center of the object for the Point Source model. [pos.eq.dec]
tract long tract ID
patch char patch ID
x double pixel 2D centroid location (x coordinate) [pos.cartesian.x]
y double pixel 2D centroid location (y coordinate) [pos.cartesian.y]
xErr float pixel error on x [stat.error;pos.cartesian.x]
yErr float pixel error on Y [stat.error;pos.cartesian.y]
xy_flag boolean Flag for issues with x and y
psNdata float Number of data points (pixels) used to fit the model
extendedness double 0:star, 1:extended. DM Stack `base_ClassificationExtendedness_value
blendedness double measure of how flux is affected by neighbors (1 - flux.child/flux.parent) (see 4.9.11 of [1705.06766](https://arxiv.org/abs/1705.06766))
Ixx_pixel double nmgy.arcsec**2 Adaptive second moment of the source intensity across bands.
Iyy_pixel double nmgy.arcsec**2 Adaptive second moment of the source intensity across bands.
Ixy_pixel double nmgy.arcsec**2 Adaptive second moment of the source intensity across bands.
I_flag boolean Flag for issues with Ixx_pixel, Iyy_pixel, and Ixy_pixel.
IxxPSF_pixel double nmgy.arcsec**2 Adaptive second moment of the PSF across bands
IyyPSF_pixel double nmgy.arcsec**2 Adaptive second moment of the PSF across bands
IxyPSF_pixel double nmgy.arcsec**2 Adaptive second moment of the PSF across bands
mag_g_cModel double mag Composite model (cModel) magnitude for g filter fitted by cModel
mag_i_cModel double mag Composite model (cModel) magnitude for i filter fitted by cModel
mag_r_cModel double mag Composite model (cModel) magnitude for r filter fitted by cModel
mag_u_cModel double mag Composite model (cModel) magnitude for u filter fitted by cModel
mag_y_cModel double mag Composite model (cModel) magnitude for y filter fitted by cModel
mag_z_cModel double mag Composite model (cModel) magnitude for z filter fitted by cModel
magerr_g_cModel double mag Error on mag_g_cModel [stat.error]
magerr_i_cModel double mag Error on mag_i_cModel [stat.error]
magerr_r_cModel double mag Error on mag_r_cModel [stat.error]
magerr_u_cModel double mag Error on mag_u_cModel [stat.error]
magerr_y_cModel double mag Error on mag_y_cModel [stat.error]
magerr_z_cModel double mag Error on mag_z_cModel [stat.error]
snr_g_cModel double Signal to noise ratio for magnitude for g filter fitted by cModel [stat.snr]
snr_i_cModel double Signal to noise ratio for magnitude for i filter fitted by cModel [stat.snr]
snr_r_cModel double Signal to noise ratio for magnitude for r filter fitted by cModel [stat.snr]
snr_u_cModel double Signal to noise ratio for magnitude for u filter fitted by cModel [stat.snr]
snr_y_cModel double Signal to noise ratio for magnitude for y filter fitted by cModel [stat.snr]
snr_z_cModel double Signal to noise ratio for magnitude for z filter fitted by cModel [stat.snr]
psFlux_g double nmgy Calibrated flux for Point Source model for g filter. [phot.count]
psFlux_i double nmgy Calibrated flux for Point Source model for i filter. [phot.count]
psFlux_r double nmgy Calibrated flux for Point Source model for r filter. [phot.count]
psFlux_u double nmgy Calibrated flux for Point Source model for u filter. [phot.count]
psFlux_y double nmgy Calibrated flux for Point Source model for y filter. [phot.count]
psFlux_z double nmgy Calibrated flux for Point Source model for z filter. [phot.count]
psFlux_flag_g boolean flag for issues with psFlux_g
psFlux_flag_i boolean flag for issues with psFlux_i
psFlux_flag_r boolean flag for issues with psFlux_r
psFlux_flag_u boolean flag for issues with psFlux_u
psFlux_flag_y boolean flag for issues with psFlux_y
psFlux_flag_z boolean flag for issues with psFlux_zs
psFluxErr_g double nmgy Uncertainty of psFlux_g. [stat.error;phot.count]
psFluxErr_i double nmgy Uncertainty of psFlux_i. [stat.error;phot.count]
psFluxErr_r double nmgy Uncertainty of psFlux_r. [stat.error;phot.count]
psFluxErr_u double nmgy Uncertainty of psFlux_u. [stat.error;phot.count]
psFluxErr_y double nmgy Uncertainty of psFlux_y. [stat.error;phot.count]
psFluxErr_z double nmgy Uncertainty of psFlux_z. [stat.error;phot.count]
mag_g double mag Magnitude for g filter
mag_i double mag Magnitude for i filter
mag_r double mag Magnitude for r filter
mag_u double mag Magnitude for u filter
mag_y double mag Magnitude for y filter
mag_z double mag magnitude for z filter
magerr_g double mag Error on mag_g [stat.error]
magerr_i double mag Error on mag_i [stat.error]
magerr_r double mag Error on mag_r [stat.error]
magerr_u double mag Error on mag_u [stat.error]
magerr_y double mag Error on mag_y [stat.error]
magerr_z double mag Error on mag_z [stat.error]
I_flag_g boolean Flag for issues with second moments of source intensity, g band
I_flag_i boolean Flag for issues with second moments of source intensity, i band
I_flag_r boolean Flag for issues with second moments of source intensity, r band
I_flag_u boolean Flag for issues with second moments of source intensity, u band
I_flag_y boolean Flag for issues with second moments of source intensity, y band
I_flag_z boolean Flag for issues with second moments of source intensity, z band
Ixx_pixel_g double arcsec**2 Adaptive second moment of the source intensity, g band
Ixx_pixel_i double arcsec**2 Adaptive second moment of the source intensity, i band
Ixx_pixel_r double arcsec**2 Adaptive second moment of the source intensity, r band
Ixx_pixel_u double arcsec**2 Adaptive second moment of the source intensity, u band
Ixx_pixel_y double arcsec**2 Adaptive second moment of the source intensity, y band
Ixx_pixel_z double arcsec**2 Adaptive second moment of the source intensity, z band
Iyy_pixel_g double arcsec**2 Adaptive second moment of the source intensity, g band
Iyy_pixel_i double arcsec**2 Adaptive second moment of the source intensity, i band
Iyy_pixel_r double arcsec**2 Adaptive second moment of the source intensity, r band
Iyy_pixel_u double arcsec**2 Adaptive second moment of the source intensity, u band
Iyy_pixel_y double arcsec**2 Adaptive second moment of the source intensity, y band
Iyy_pixel_z double arcsec**2 Adaptive second moment of the source intensity, z band
Ixy_pixel_g double arcsec**2 Adaptive second moment of the source intensity, g band
Ixy_pixel_i double arcsec**2 Adaptive second moment of the source intensity, i band
Ixy_pixel_r double arcsec**2 Adaptive second moment of the source intensity, r band
Ixy_pixel_u double arcsec**2 Adaptive second moment of the source intensity, u band
Ixy_pixel_y double arcsec**2 Adaptive second moment of the source intensity, y band
Ixy_pixel_z double arcsec**2 Adaptive second moment of the source intensity, z band
IxxPSF_pixel_g double arcsec**2 Adaptive second moment of the PSF, g band
IxxPSF_pixel_i double arcsec**2 Adaptive second moment of the PSF, i band
IxxPSF_pixel_r double arcsec**2 Adaptive second moment of the PSF, r band
IxxPSF_pixel_u double arcsec**2 Adaptive second moment of the PSF, u band
IxxPSF_pixel_y double arcsec**2 Adaptive second moment of the PSF, y band
IxxPSF_pixel_z double arcsec**2 Adaptive second moment of the PSF, z band
IyyPSF_pixel_g double arcsec**2 Adaptive second moment of the PSF, g band
IyyPSF_pixel_i double arcsec**2 Adaptive second moment of the PSF, i band
IyyPSF_pixel_r double arcsec**2 Adaptive second moment of the PSF, r band
IyyPSF_pixel_u double arcsec**2 Adaptive second moment of the PSF, u band
IyyPSF_pixel_y double arcsec**2 Adaptive second moment of the PSF, y band
IyyPSF_pixel_z double arcsec**2 Adaptive second moment of the PSF, z band
IxyPSF_pixel_g double arcsec**2 Adaptive second moment of the PSF, g band
IxyPSF_pixel_i double arcsec**2 Adaptive second moment of the PSF, i band
IxyPSF_pixel_r double arcsec**2 Adaptive second moment of the PSF, r band
IxyPSF_pixel_u double arcsec**2 Adaptive second moment of the PSF, u band
IxyPSF_pixel_y double arcsec**2 Adaptive second moment of the PSF, y band
IxyPSF_pixel_z double arcsec**2 Adaptive second moment of the PSF, z band
good boolean True if the source has no flagged pixels
clean boolean True if the source has no flagged pixels and is not deblended
cModelFlux_g double composite model (CModel) flux in _<band>
cModelFlux_i double composite model (CModel) flux in _<band>
cModelFlux_r double composite model (CModel) flux in _<band>
cModelFlux_u double composite model (CModel) flux in _<band>
cModelFlux_y double composite model (CModel) flux in _<band>
cModelFlux_z double composite model (CModel) flux in _<band>
cModelFluxErr_g double Error value for cModel flux in _<band>
cModelFluxErr_i double Error value for cModel flux in _<band>
cModelFluxErr_r double Error value for cModel flux in _<band>
cModelFluxErr_u double Error value for cModel flux in _<band>
cModelFluxErr_y double Error value for cModel flux in _<band>
cModelFluxErr_z double Error value for cModel flux in _<band>
cModelFlux_flag_g boolean Flag for issues with cModelFlux_flag_<band>
cModelFlux_flag_i boolean Flag for issues with cModelFlux_flag_<band>
cModelFlux_flag_r boolean Flag for issues with cModelFlux_flag_<band>
cModelFlux_flag_u boolean Flag for issues with cModelFlux_flag_<band>
cModelFlux_flag_y boolean Flag for issues with cModelFlux_flag_<band>
cModelFlux_flag_z boolean Flag for issues with cModelFlux_flag_<band>
psf_fwhm_g double PSF FWHM calculated from base_SdssShape
psf_fwhm_i double PSF FWHM calculated from base_SdssShape
psf_fwhm_r double PSF FWHM calculated from base_SdssShape
psf_fwhm_u double PSF FWHM calculated from base_SdssShape
psf_fwhm_y double PSF FWHM calculated from base_SdssShape
psf_fwhm_z double PSF FWHM calculated from base_SdssShape

truth_match

The truth-match table for the DESC DC2's object table as described in arXiv:2101.04855. Includes the noiseless astrometric and photometric parameters and the best matches to the object table. (30 columns)

Column Name Data Type Unit Description [UCD]
id char Unique object ID
host_galaxy long ID of the host galaxy for a SN/AGN entry (-1 for other truth types)
ra double deg Right Ascension [pos.eq.ra]
dec double deg Declination [pos.eq.dec]
redshift float Redshift
is_variable int 1 for a variable source
is_pointsource int 1 for a point source
flux_u float nJy Static flux value in u
flux_g float nJy Static flux value in g
flux_r float nJy Static flux value in r
flux_i float nJy Static flux value in i
flux_z float nJy Static flux value in z
flux_y float nJy Static flux value in y
flux_u_noMW float nJy Static flux value in u, without Milky Way extinction (i.e., dereddened)
flux_g_noMW float nJy Static flux value in g, without Milky Way extinction (i.e., dereddened)
flux_r_noMW float nJy Static flux value in r, without Milky Way extinction (i.e., dereddened)
flux_i_noMW float nJy Static flux value in i, without Milky Way extinction (i.e., dereddened)
flux_z_noMW float nJy Static flux value in z, without Milky Way extinction (i.e., dereddened)
flux_y_noMW float nJy Static flux value in y, without Milky Way extinction (i.e., dereddened)
mag_r float mag Magnitude in r
tract long Tract ID in Sky Map
patch char Patch ID in Sky Map (as a string, x,y)
cosmodc2_hp long Healpix ID in cosmoDC2 (for galaxies only; -1 for stars and SNe)
cosmodc2_id long Galaxy ID in cosmoDC2 (for galaxies only; -1 for stars and SNe)
truth_type long 1 for galaxies, 2 for stars, and 3 for SNe
match_objectId long objectId of the matching object entry (-1 for unmatched truth entries)
match_sep double arcsec On-sky angular separation of this object-truth matching pair (-1 for unmatched truth entries)
is_good_match boolean True if this object--truth matching pair satisfies all matching criteria
is_nearest_neighbor boolean True if this truth entry is the nearest neighbor of the object specified by match_objectId
is_unique_truth_entry boolean True for truth entries that appear for the first time in this truth table