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
sourceId primary key long Unique id. Unique Source ID. Primary Key. false meta.id;src;meta.main
coord_ra double Fiducial ICRS Right Ascension of centroid used for database indexing deg true pos.eq.ra;meta.main
coord_dec double Fiducial ICRS Declination of centroid used for database indexing deg true pos.eq.dec;meta.main
ccdVisitId foreign key long Unique ID of CCD and visit where this source was detected and measured. Primary Key of the CcdVisit Table. true meta.id;obs.image
parentSourceId long Unique ID of parent source true meta.id.parent
x double Centroid from SDSS Centroid algorithm pixel true
y double Centroid from SDSS Centroid algorithm pixel true
xErr float 1-sigma uncertainty on x position pixel true
yErr float 1-sigma uncertainty on y position pixel true
ra double Position in Right Ascension deg true pos.eq.ra
decl double Position in Declination deg true pos.eq.dec
calibFlux double Flux within 12.0-pixel aperture nJy true
calibFluxErr double Flux uncertainty within 12.0-pixel aperture nJy true
ap03Flux double Flux within 3.0-pixel aperture nJy true
ap03FluxErr double Flux uncertainty within 3.0-pixel aperture nJy true
ap03Flux_flag boolean General Failure Flag true
ap06Flux double Flux within 6.0-pixel aperture nJy true
ap06FluxErr double Flux uncertainty within 6.0-pixel aperture nJy true
ap06Flux_flag boolean General Failure Flag true
ap09Flux double Flux within 9.0-pixel aperture nJy true
ap09FluxErr double Flux uncertainty within 9.0-pixel aperture nJy true
ap09Flux_flag boolean General Failure Flag true
ap12Flux double Flux within 12.0-pixel aperture nJy true
ap12FluxErr double Flux uncertainty within 12.0-pixel aperture nJy true
ap12Flux_flag boolean General Failure Flag true
ap17Flux double Flux within 17.0-pixel aperture nJy true
ap17FluxErr double Flux uncertainty within 17.0-pixel aperture nJy true
ap17Flux_flag boolean General Failure Flag true
ap25Flux double Flux within 25.0-pixel aperture nJy true
ap25FluxErr double Flux uncertainty within 25.0-pixel aperture nJy true
ap25Flux_flag boolean General Failure Flag true
ap35Flux double Flux within 35.0-pixel aperture nJy true
ap35FluxErr double Flux uncertainty within 35.0-pixel aperture nJy true
ap35Flux_flag boolean General Failure Flag true
ap50Flux double Flux within 50.0-pixel aperture nJy true
ap50FluxErr double Flux uncertainty within 50.0-pixel aperture nJy true
ap50Flux_flag boolean General Failure Flag true
ap70Flux double Flux within 70.0-pixel aperture nJy true
ap70FluxErr double Flux uncertainty within 70.0-pixel aperture nJy true
ap70Flux_flag boolean General Failure Flag true
sky double Background in annulus around source nJy true
skyErr double Background in annulus around source nJy 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
ixx double HSM moments pixel**2 true
iyy double HSM moments pixel**2 true
ixy double HSM moments pixel**2 true
ixxPSF double HSM moments pixel**2 true
iyyPSF double HSM moments pixel**2 true
ixyPSF double HSM moments pixel**2 true
gaussianFlux double Flux from Gaussian Flux algorithm nJy true
gaussianFluxErr double Flux uncertainty from Gaussian Flux algorithm nJy true
extendedness double Set to 1 for extended sources, 0 for point sources. true
localPhotoCalib double Local approximation of the PhotoCalib calibration factor at the location of the src. true
localPhotoCalib_flag boolean Set for any fatal failure true
localPhotoCalibErr double Uncertainty on the local approximation of the PhotoCalib calibration factor at the location of the src. true
localWcs_flag boolean Set for any fatal failure true
localWcs_CDMatrix_2_1 double (2, 1) element of the CDMatrix for the linear approximation of the WCS at the src location. Gives units in radians. true
localWcs_CDMatrix_1_1 double (1, 1) element of the CDMatrix for the linear approximation of the WCS at the src location. Gives units in radians. true
localWcs_CDMatrix_1_2 double (1, 2) element of the CDMatrix for the linear approximation of the WCS at the src location. Gives units in radians. true
localWcs_CDMatrix_2_2 double (2, 2) element of the CDMatrix for the linear approximation of the WCS at the src location. Gives units in radians. true
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
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 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 aperture count true
apFlux_17_0_instFluxErr double 1-sigma flux uncertainty count true
extendedness_flag boolean Set to 1 for any fatal failure. true
footprintArea_value int Number of pixels in the source's detection footprint. pixel true
jacobian_flag boolean Set to 1 for any fatal failure true
jacobian_value double Jacobian correction true
localBackground_instFlux double Background in annulus around source count true
localBackground_instFluxErr double 1-sigma flux uncertainty count 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
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 outside usable exposure region (masked EDGE or NO_DATA) true
pixelFlags_interpolated boolean Interpolated pixel in the Source footprint true
pixelFlags_interpolatedCenter boolean Interpolated pixel in the Source center 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 Source's footprint includes suspect pixels true
pixelFlags_suspectCenter boolean Source's center is close to suspect pixels 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
gaussianFlux_flag boolean General Failure Flag true
centroid_flag boolean General Failure Flag true
centroid_flag_almostNoSecondDerivative boolean Almost vanishing second derivative true
centroid_flag_badError boolean Uncertainty 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
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
calib_astrometry_used boolean Set if source was used in astrometric calibration true
calib_detected boolean Source was detected as an image characterization source (icSrc) 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
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
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
sky_source boolean Sky objects. true
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
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 * 1
instrument char ID of instrument, the entity that produces observations. true 13 13
detector long Detector ID. A detector associated with a particular instrument (not an observation of that detector) true
physical_filter char ID of physical filter, the filter associated with a particular instrument. true 9 9
visit_system long ID of visit system, the system of self-consistent visit definitions true
visit long ID of visit, the identifier for an observation within a sequence of observations. true

Constraints

Constraint Type Definition Description
CcdV_Src ForeignKey
Columns: ccdVisitId
References: CcdVisit.ccdVisitId
 Link CCD-level images to associated Sources