Description: Contains single epoch photometry of individual detections from a single exposure. The identifiers connecting the detection back to the original image and to the object association are provided. PSF, aperture, and Kron (1980) photometry are included, along with sky and detector coordinate positions. References: Kron, R. G. 1980, ApJS, 43, 305.
Name
Unit
Data Type
Size
Default Value
Description
objID
dimensionless
BIGINT
8
NA
Unique object identifier.
uniquePspsP2id
dimensionless
BIGINT
8
NA
Unique internal PSPS detection identifier.
detectID
dimensionless
BIGINT
8
NA
Unique detection identifier.
ippObjID
dimensionless
BIGINT
8
NA
IPP internal object identifier.
ippDetectID
dimensionless
BIGINT
8
NA
IPP internal detection identifier.
filterID
dimensionless
TINYINT
1
NA
Filter identifier. Details in the Filter table.
surveyID
dimensionless
TINYINT
1
NA
Survey identifier. Details in the Survey table.
imageID
dimensionless
BIGINT
8
NA
Unique image identifier. Constructed as (100 * frameID + ccdID).
randomDetID
dimensionless
FLOAT
8
NA
Random value drawn from the interval between zero and one.
dvoRegionID
dimensionless
INT
4
-1
Internal DVO region identifier.
obsTime
days
FLOAT
8
-999
Modified Julian Date at the midpoint of the observation.
xPos
raw pixels
REAL
4
-999
PSF x center location.
yPos
raw pixels
REAL
4
-999
PSF y center location.
xPosErr
raw pixels
REAL
4
-999
Error in PSF x center location.
yPosErr
raw pixels
REAL
4
-999
Error in PSF y center location.
pltScale
arcsec/pixel
REAL
4
-999
Local plate scale at this location.
posAngle
degrees
REAL
4
-999
Position angle (sky-to-chip) at this location.
ra
degrees
FLOAT
8
-999
Right ascension.
dec
degrees
FLOAT
8
-999
Declination.
raErr
arcsec
REAL
4
-999
Right ascension error.
decErr
arcsec
REAL
4
-999
Declination error.
extNSigma
dimensionless
REAL
4
0
An extendedness measure based on the deviation between PSF and Kron (1980) magnitudes, normalized by the PSF magnitude uncertainty.
zp
magnitudes
REAL
4
0
Photometric zeropoint. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.
telluricExt
magnitudes
REAL
4
NA
Estimated Telluric extinction due to non-photometric observing conditions. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.
expTime
seconds
REAL
4
-999
Exposure time of the frame/exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.
airMass
dimensionless
REAL
4
0
Airmass at midpoint of the exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.
psfFlux
Janskys
REAL
4
-999
Flux from PSF fit.
psfFluxErr
Janskys
REAL
4
-999
Error on flux from PSF fit.
psfMajorFWHM
arcsec
REAL
4
-999
PSF major axis FWHM.
psfMinorFWHM
arcsec
REAL
4
-999
PSF minor axis FWHM.
psfTheta
degrees
REAL
4
-999
PSF major axis orientation.
psfCore
dimensionless
REAL
4
-999
PSF core parameter k, where F = F0 / (1 + k r^2 + r^3.33).
psfQf
dimensionless
REAL
4
-999
PSF coverage factor.
psfQfPerfect
dimensionless
REAL
4
-999
PSF weighted fraction of pixels totally unmasked.
psfChiSq
dimensionless
REAL
4
-999
Reduced chi squared value of the PSF model fit.
psfLikelihood
dimensionless
REAL
4
-999
Likelihood that this detection is best fit by a PSF.
momentXX
arcsec^2
REAL
4
-999
Second moment M_xx.
momentXY
arcsec^2
REAL
4
-999
Second moment M_xy.
momentYY
arcsec^2
REAL
4
-999
Second moment M_yy.
momentR1
arcsec
REAL
4
-999
First radial moment.
momentRH
arcsec^0.5
REAL
4
-999
Half radial moment (r^0.5 weighting).
momentM3C
arcsec^2
REAL
4
-999
Cosine of trefoil second moment term: r^2 cos(3 theta) = M_xxx - 3 * M_xyy.
momentM3S
arcsec^2
REAL
4
-999
Sine of trefoil second moment: r^2 sin (3 theta) = 3 * M_xxy - M_yyy.
momentM4C
arcsec^2
REAL
4
-999
Cosine of quadrupole second moment: r^2 cos (4 theta) = M_xxxx - 6 * M_xxyy + M_yyyy.
momentM4S
arcsec^2
REAL
4
-999
Sine of quadrupole second moment: r^2 sin (4 theta) = 4 * M_xxxy - 4 * M_xyyy.
apFlux
Janskys
REAL
4
-999
Flux in seeing-dependent aperture.
apFluxErr
Janskys
REAL
4
-999
Error on flux in seeing-dependent aperture.
apFillF
dimensionless
REAL
4
-999
Aperture fill factor.
apRadius
arcsec
REAL
4
-999
Aperture radius.
kronFlux
Janskys
REAL
4
-999
Kron (1980) flux.
kronFluxErr
Janskys
REAL
4
-999
Error on Kron (1980) flux.
kronRad
arcsec
REAL
4
-999
Kron (1980) radius.
sky
Janskys/arcsec^2
REAL
4
-999
Background sky level.
skyErr
Janskys/arcsec^2
REAL
4
-999
Error in background sky level.
infoFlag
dimensionless
BIGINT
8
0
Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags.
infoFlag2
dimensionless
INT
4
0
Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags2.
infoFlag3
dimensionless
INT
4
0
Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags3.