ForcedSource

Forced-photometry measurements on individual single-epoch visit images and difference images, based on and linked to the entries in the Object table. Point-source PSF photometry is performed, based on coordinates from a reference band chosen for each Object and reported in the Object.refBand column.

Columns

name datatype description unit nullable ivoa:ucd tap:column_index tap:principal votable:arraysize length
forcedSourceId primary key long Unique ID of forced source. Primary Key. true meta.id;meta.main 100 1
objectId foreign key long Unique Object ID. Primary Key of the Object Table true meta.id 10 1
parentObjectId long Unique ObjectId of the parent of the ObjectId in context of the deblender. true meta.id.parent 130 0
coord_ra double Fiducial ICRS Right Ascension of Object centroid used for database indexing deg true pos.eq.ra;meta.main 110 0
coord_dec double Fiducial ICRS Declination of Object centroid used for database indexing deg true pos.eq.dec;meta.main 120 0
skymap char Name of skymap used for coadd projection true 160 0 12 12
tract long Skymap tract ID true meta.id 140 0
patch long Skymap patch ID true meta.id.part 150 0
band char Abstract filter that is not associated with a particular instrument true meta.id;instr.filter 20 1 * 1
ccdVisitId foreign key long Unique ID of visit and detector for which forced photometry was performed. Primary Key of the CcdVisit Table. true meta.id;obs.image 90 1
detect_isPatchInner boolean True if Object seed is in the inner region of a coadd patch true meta.code 190 0
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 meta.code.qual 170 1
detect_isTractInner boolean True if Object seed is in the inner region of a coadd tract true meta.code 180 0
localBackground_instFluxErr double 1-sigma uncertainty on the background in an annulus around source count true stat.error;phot.count 410 0
localBackground_instFlux double Background in annulus around source count true phot.count 400 0
localPhotoCalibErr double Uncertainty on the local approximation of the PhotoCalib calibration factor at the location of the src. true stat.error;phot.calib 430 0
localPhotoCalib_flag boolean Set for any fatal failure true meta.code.qual 440 0
localPhotoCalib double Local approximation of the PhotoCalib calibration factor at the location of the src. true phot.calib 420 0
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 pos.wcs.cdmatrix 450 0
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 pos.wcs.cdmatrix 460 0
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 pos.wcs.cdmatrix 470 0
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 pos.wcs.cdmatrix 480 0
localWcs_flag boolean Set for any fatal failure true meta.code.qual 490 0
pixelFlags_bad boolean Bad pixel in the Source footprint true meta.code.qual;instr.pixel 200 0
pixelFlags_crCenter boolean Cosmic ray in the Source center true meta.code.qual;instr.pixel 220 0
pixelFlags_cr boolean Cosmic ray in the Source footprint true meta.code.qual;instr.pixel 210 0
pixelFlags_edge boolean Source is outside usable exposure region (masked EDGE or NO_DATA) true meta.code.qual;instr.pixel 230 0
pixelFlags_interpolatedCenter boolean Interpolated pixel in the Source center true meta.code.qual;instr.pixel 250 0
pixelFlags_interpolated boolean Interpolated pixel in the Source footprint true meta.code.qual;instr.pixel 240 0
pixelFlags_saturatedCenter boolean Saturated pixel in the Source center true meta.code.qual;instr.pixel 270 0
pixelFlags_saturated boolean Saturated pixel in the Source footprint true meta.code.qual;instr.pixel 260 0
pixelFlags_suspectCenter boolean Source's center is close to suspect pixels true meta.code.qual;instr.pixel 290 0
pixelFlags_suspect boolean Source's footprint includes suspect pixels true meta.code.qual;instr.pixel 280 0
psfDiffFluxErr double Uncertainty on the flux derived from linear least-squares fit of psf model forced on the image difference nJy true stat.error;phot.flux 70 1
psfDiffFlux_flag boolean Failure to derive linear least-squares fit of psf model forced on the image difference true meta.code.qual 80 0
psfDiffFlux double Flux derived from linear least-squares fit of psf model forced on the image difference nJy true phot.flux 60 1
psfFluxErr double Uncertainty on the flux derived from linear least-squares fit of psf model forced on the calexp nJy true stat.error;phot.flux 40 1
psfFlux_flag boolean Failure to derive linear least-squares fit of psf model forced on the calexp true meta.code.qual 50 0
psfFlux double Flux derived from linear least-squares fit of psf model forced on the calexp nJy true phot.flux 30 1

Constraints

Constraint Type Definition Description
Obj_FS ForeignKey
Columns: objectId
References: Object.objectId
 Link Objects to associated ForcedSources
CcdV_FS ForeignKey
Columns: ccdVisitId
References: CcdVisit.ccdVisitId
 Link CCD-level images to associated ForcedSources