Source

Properties of detections on the single-epoch visit images, performed independently of the Object detections on coadded images.

Columns

name datatype description unit nullable ivoa:ucd votable:arraysize length
ap03Flux double Flux within 3.0-pixel radius aperture nJy true
ap03FluxErr double Flux uncertainty within 3.0-pixel radius aperture nJy true
ap03Flux_flag boolean General Failure Flag true
ap06Flux double Flux within 6.0-pixel radius aperture nJy true
ap06FluxErr double Flux uncertainty within 6.0-pixel radius aperture nJy true
ap06Flux_flag boolean General Failure Flag true
ap09Flux double Flux within 9.0-pixel radius aperture nJy true
ap09FluxErr double Flux uncertainty within 9.0-pixel radius aperture nJy true
ap09Flux_flag boolean General Failure Flag true
ap12Flux double Flux within 12.0-pixel radius aperture nJy true
ap12FluxErr double Flux uncertainty within 12.0-pixel radius aperture nJy true
ap12Flux_flag boolean General Failure Flag true
ap17Flux double Flux within 17.0-pixel radius aperture nJy true
ap17FluxErr double Flux uncertainty within 17.0-pixel radius aperture nJy true
ap17Flux_flag boolean General Failure Flag true
ap25Flux double Flux within 25.0-pixel radius aperture nJy true
ap25FluxErr double Flux uncertainty within 25.0-pixel radius aperture nJy true
ap25Flux_flag boolean General Failure Flag true
ap35Flux double Flux within 35.0-pixel radius aperture nJy true
ap35FluxErr double Flux uncertainty within 35.0-pixel radius aperture nJy true
ap35Flux_flag boolean General Failure Flag true
ap50Flux double Flux within 50.0-pixel radius aperture nJy true
ap50FluxErr double Flux uncertainty within 50.0-pixel radius aperture nJy true
ap50Flux_flag boolean General Failure Flag true
ap70Flux double Flux within 70.0-pixel radius aperture nJy true
ap70FluxErr double Flux uncertainty within 70.0-pixel radius aperture nJy true
ap70Flux_flag boolean General Failure Flag true
apFlux_12_0_flag boolean General Failure Flag true
apFlux_12_0_flag_apertureTruncated boolean Aperture did not fit within measurement image true
apFlux_12_0_flag_sincCoeffsTruncated boolean Full sinc coefficient image did not fit within measurement image true
apFlux_12_0_instFlux double Flux within 12.0-pixel radius aperture count true
apFlux_12_0_instFluxErr double 1-sigma flux uncertainty count true
apFlux_17_0_flag boolean General Failure Flag true
apFlux_17_0_instFlux double Flux within 17.0-pixel radius aperture count true
apFlux_17_0_instFluxErr double 1-sigma flux uncertainty count true
apFlux_35_0_flag boolean General Failure Flag true
apFlux_35_0_instFlux double Flux within 35.0-pixel radius aperture count true
apFlux_35_0_instFluxErr double 1-sigma flux uncertainty count true
apFlux_50_0_flag boolean General Failure Flag true
apFlux_50_0_instFlux double Flux within 50.0-pixel radius aperture count true
apFlux_50_0_instFluxErr double 1-sigma flux uncertainty count true
band char Name of the band used to take the exposure where this source was measured. Abstract filter that is not associated with a particular instrument true meta.id;instr.bandpass 1
blendedness_abs double Measure of how much the flux is affected by neighbors, (1 - child_flux/parent_flux). 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. true
blendedness_flag boolean General Failure Flag true
blendedness_flag_noCentroid boolean Object has no centroid true
blendedness_flag_noShape boolean Object has no shape true
calibFlux double Flux within 12.0-pixel radius aperture nJy true
calibFluxErr double Flux uncertainty within 12.0-pixel radius aperture nJy true
calib_astrometry_used boolean Set if source was used in astrometric calibration true
calib_photometry_reserved boolean Set if source was reserved from photometric calibration true
calib_photometry_used boolean Set if source was used in photometric calibration true
calib_psf_candidate boolean Flag set if the source was a candidate for PSF determination, as determined by the star selector. true
calib_psf_reserved boolean Set if source was reserved from PSF determination true
calib_psf_used boolean Flag set if the source was actually used for PSF determination, as determined by the true
centroid_flag boolean General Failure Flag true
centroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative true
centroid_flag_badError boolean Error on x and/or y position is NaN true
centroid_flag_edge boolean Object too close to edge true
centroid_flag_noSecondDerivative boolean Vanishing second derivative true
centroid_flag_notAtMaximum boolean Object is not at a maximum true
centroid_flag_resetToPeak boolean Set if CentroidChecker reset the centroid true
coord_dec double Fiducial ICRS Declination of centroid used for database indexing deg true pos.eq.dec
coord_ra double Fiducial ICRS Right Ascension of centroid used for database indexing deg true pos.eq.ra
deblend_deblendedAsPsf boolean Deblender thought this source looked like a PSF true
deblend_hasStrayFlux boolean This source was assigned some stray flux true
deblend_masked boolean Parent footprint was predominantly masked true
deblend_nChild int Number of children this object has (defaults to 0) true
deblend_parentTooBig boolean Parent footprint covered too many pixels true
deblend_patchedTemplate boolean This source was near an image edge and the deblender used patched edge-handling. true
deblend_rampedTemplate boolean This source was near an image edge and the deblender used ramp edge-handling. true
deblend_skipped boolean Deblender skipped this source true
deblend_tooManyPeaks boolean Source had too many peaks; only the brightest were included true
dec double Position in declination. deg true pos.eq.dec;meta.main
decErr float Error in declination. deg true stat.error;pos.eq.dec
detect_isPrimary boolean True if Object seed 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 a sky object true
detector short Id of the detector where this source was measured. false meta.id;obs.image
extendedness double PSF to cModel flux-ratio measure of whether an object is point-like (0) or extended (1); values are either 0 or 1. true
extendedness_flag boolean Set to 1 for any fatal failure. true
footprintArea_value int Number of pixels in the sources detection footprint. pixel true
gaussianFlux double Flux from Gaussian Flux algorithm nJy true
gaussianFluxErr double Flux uncertainty from Gaussian Flux algorithm nJy true
gaussianFlux_flag boolean General Failure Flag true
hsmPsfMoments_flag boolean General failure flag, set if anything went wrong true
hsmPsfMoments_flag_no_pixels boolean No pixels to measure true
hsmPsfMoments_flag_not_contained boolean Center not contained in footprint bounding box true
hsmPsfMoments_flag_parent_source boolean Parent source, ignored true
hsmShapeRegauss_flag boolean General failure flag, set if anything went wrong true
hsmShapeRegauss_flag_galsim boolean GalSim failure true
hsmShapeRegauss_flag_no_pixels boolean No pixels to measure true
hsmShapeRegauss_flag_not_contained boolean Center not contained in footprint bounding box true
hsmShapeRegauss_flag_parent_source boolean Parent source, ignored true
iDebiasedPSF_flag boolean General failure flag, set if anything went wrong true
iDebiasedPSF_flag_edge boolean Variance undefined outside image edge true
iDebiasedPSF_flag_galsim boolean GalSim failure true
iDebiasedPSF_flag_no_pixels boolean No pixels to measure true
iDebiasedPSF_flag_not_contained boolean Center not contained in footprint bounding box true
iDebiasedPSF_flag_parent_source boolean Parent source, ignored true
invalidPsfFlag boolean Source has an invalid psf. true
ixx double HSM moments pixel**2 true
ixxDebiasedPSF double HSM moments pixel**2 true
ixxPSF double HSM moments pixel**2 true
ixy double HSM moments pixel**2 true
ixyDebiasedPSF double HSM moments pixel**2 true
ixyPSF double HSM moments pixel**2 true
iyy double HSM moments pixel**2 true
iyyDebiasedPSF double HSM moments pixel**2 true
iyyPSF double HSM moments pixel**2 true
jacobian_flag boolean Set to 1 for any fatal failure true
jacobian_value double Jacobian correction true
localBackground_flag boolean General Failure Flag true
localBackground_flag_noGoodPixels boolean No good pixels in the annulus true
localBackground_flag_noPsf boolean No PSF provided true
localBackground_instFlux double Background in annulus around source count true
localBackground_instFluxErr double 1-sigma flux uncertainty count true
normCompTophatFlux_flag boolean General failure flag for normCompTophatFlux. true
normCompTophatFlux_instFlux double Normalized compensated tophat flux for calibration count true
normCompTophatFlux_instFluxErr double 1-sigma flux uncertainty on normCompTophatFlux_instFlux count true
parentSourceId long Unique ID of parent source true
physical_filter char ID of physical filter, the filter associated with a particular instrument. true meta.id;instr.filter 9 9
pixelFlags_bad boolean Bad pixel in the Source footprint true
pixelFlags_cr boolean Cosmic ray in the Source footprint true
pixelFlags_crCenter boolean Cosmic ray in the Source center true
pixelFlags_edge boolean Source is on the edge of an exposure region (masked EDGE) true
pixelFlags_interpolated boolean Interpolated pixel in the Source footprint true
pixelFlags_interpolatedCenter boolean Interpolated pixel in the Source center true
pixelFlags_nodata boolean Source is outside usable exposure region (masked NO_DATA) true
pixelFlags_offimage boolean Source center is off image true
pixelFlags_saturated boolean Saturated pixel in the Source footprint true
pixelFlags_saturatedCenter boolean Saturated pixel in the Source center true
pixelFlags_suspect boolean Sources footprint includes suspect pixels true
pixelFlags_suspectCenter boolean Sources center is close to suspect pixels true
psfFlux double Flux derived from linear least-squares fit of psf model forced on the calexp nJy true
psfFluxErr double Uncertainty on the flux derived from linear least-squares fit of psf model forced on the calexp nJy true
psfFlux_apCorr double Aperture correction applied to base_PsfFlux true
psfFlux_apCorrErr double Standard deviation of aperture correction applied to base_PsfFlux true
psfFlux_area float Effective area of PSF pixel true
psfFlux_flag boolean Failure to derive linear least-squares fit of psf model forced on the calexp true
psfFlux_flag_apCorr boolean Set if unable to aperture correct base_PsfFlux true
psfFlux_flag_edge boolean Object was too close to the edge of the image to use the full PSF model true
psfFlux_flag_noGoodPixels boolean Not enough non-rejected pixels in data to attempt the fit true
ra double Position in right ascension. deg true pos.eq.ra;meta.main
raErr float Angular error in right ascension (∂RA*cos(Dec)). deg true stat.error;pos.eq.ra
ra_dec_Cov float Covariance between right ascension (RA*cos(Dec)) and declination. deg**2 true stat.covariance;pos.eq.ra;pos.eq.dec
sizeExtendedness double Moments-based measure of a source to be a galaxy. true
sizeExtendedness_flag boolean Set to 1 for any fatal failure. true
sky double Background in annulus of radius 7-15 times the PSF sigma around source nJy true
skyErr double Error in background in annulus around source nJy true
sky_source boolean Sky objects quasi-randomly placed with no detection footprints or bad pixels within an 8-pixel radius. Used for measurement of background and noise properties. true
sourceId long Unique id. Unique Source ID. Primary Key. false meta.id;src
variance_flag boolean Set for any fatal failure true
variance_flag_emptyFootprint boolean Set to True when the footprint has no usable pixels true
variance_value double Variance at object position true
visit long Id of the visit where this source was measured. false meta.id;obs.image
x double Centroid from Sdss Centroid algorithm pixel true
xErr float 1-sigma uncertainty on x position pixel true
y double Centroid from Sdss Centroid algorithm pixel true
yErr float 1-sigma uncertainty on y position pixel true