DetectorVisitProcessingSummary

Properties of an image from one processing of a single detector in a visit.

Columns

name datatype description unit nullable ivoa:ucd
visit long Id of the visit this visit was a part of. false meta.id;obs.image
detector short Id of the detector on the instrument that took this visit. Datatype short instead of byte because of DB concerns about unsigned bytes. false meta.id;obs.image
ra double Right Ascension of detector center. deg true
dec double Declination of detector center. deg true
pixelScale float Measured detector pixel scale. arcsec/pixel true
zeroPoint float Zero-point for the detector, estimated at detector center. mag true
psfSigma float PSF model second-moments determinant radius (center of detector). pixel true
skyBg float Average sky background. adu true
skyNoise float RMS noise of the sky background. adu true
seeing double Mean measured FWHM of the PSF. arcsec true
xSize long Number of columns in the image. pixel false
ySize long Number of rows in the image. pixel false
llcra double RA of lower left corner. deg true
llcdec double Declination of lower left corner. deg true
ulcra double RA of upper left corner. deg true
ulcdec double Declination of upper left corner. deg true
urcra double RA of upper right corner. deg true
urcdec double Declination of upper right corner. deg true
lrcra double RA of lower right corner. deg true
lrcdec double Declination of lower right corner. deg true
psfAdaptiveThresholdValue double Threshold value used in the adaptive threshold detection pass for PSF modelling. true
psfAdaptiveIncludeThresholdMultiplier double Threshold multiplier used in the adaptive threshold detection pass for PSF modelling. true
nShapeletsStar int Number of sources used in the shapelet decomposition. true
shapeletsOnlyIqScore double The dimensionless image quality score as determined from the shapelets decomposition that includes power only from the non-atmospheric decomposition coefficients. The score spans the range [0.0, 1.0] with lower values indicating better image quality. true
shapeletsIqScore double The dimensionless image quality score as determined from the shapelets decomposition that includes power from the median centroid offset between those used in the decomposition and those of the centroid slot in addition to non-atmospheric decomposition coefficients. The score spans the range [0.0, 1.0] with lower values indicating better image quality. true
centroidDiffShapeletsVsSlotMedian double Median centroid difference (sqrt((slot_x - shapelet_x)**2 + (slot_y - shapelet_y)**2)) for sources used in the shapelet decomposition. pixel true
shapeletsStarEMedian double Median ellipticity (sqrt(starE1**2.0 + starE2**2.0)) of the sources used in the shapelet decomposition. true
shapeletsStarUnNormalizedEMedian double Median un-normalized ellipticity (sqrt((starXX - starYY)**2.0 + (2.0*starXY)**2.0)) of the sources used in the shapelet decomposition. pixel**2 true
refCatSourceDensity float Source density for the detector region as computed from the loaded reference catalog (number per degrees**2) count/deg**2 true
astromOffsetMean double Mean offset of astrometric calibration matches (arcsec). arcsec true
astromOffsetStd double Standard deviation of offsets of astrometric calibration matches (arcsec). arcsec true
starComa1Median double Coma-like higher-order moment combination (median M30 + M12 of the stars used in the PSF model) true
starComa2Median double Coma-like higher-order moment combination (median M21 + M03 of the stars used in the PSF model) true
starTrefoil1Median double Trefoil-like higher-order moment combination (median M30 - 3*M12 of the stars used in the PSF model) true
starTrefoil2Median double Trefoil-like higher-order moment combination (median 3*M21 - M03 of the stars used in the PSF model) true
starKurtosisMedian double Kurtosis-like higher-order moment combination (median M40 + 2*M22 + M04 of the stars used in the PSF model) true
starE41Median double Fourth-order ellipticity-like higher-order moment combination (median M40 - M04 of the stars used in the PSF model) true
starE42Median double Fourth-order ellipticity-like higher-order moment combination (median 2*(M31 + M13) of the stars used in the PSF model) true
nPsfStar int Number of stars used for PSF model. false
psfStarDeltaE1Median double Median E1 residual (starE1 - psfE1) for psf stars. true
psfStarDeltaE2Median double Median E2 residual (starE2 - psfE2) for psf stars. true
psfStarDeltaE1Scatter double Scatter (via MAD) of E1 residual (starE1 - psfE1) for psf stars. true
psfStarDeltaE2Scatter double Scatter (via MAD) of E2 residual (starE2 - psfE2) for psf stars. true
psfStarDeltaSizeMedian double Median size residual (starSize - psfSize) for psf stars (pixel). pixel true
psfStarDeltaSizeScatter double Scatter (via MAD) of size residual (starSize - psfSize) for stars (pixel). pixel true
psfStarScaledDeltaSizeScatter double Scatter (via MAD) of size residual scaled by median size squared. true
psfTraceRadiusDelta double Delta (max - min) of model psf trace radius values evaluated on a grid of unmasked pixels (pixel). pixel true
psfApFluxDelta double Delta (max - min) of model psf aperture flux (with aperture radius of max(2, 3*psfSigma)) values evaluated on a grid of unmasked pixels true
psfApCorrSigmaScaledDelta double Delta (max - min) of psf flux aperture correction factors scaled (divided) by the psfSigma evaluated on a grid of unmasked pixels true
maxDistToNearestPsf double Maximum distance of an unmasked pixel to its nearest model psf star (pixel). pixel true
starEMedian double Median ellipticity (sqrt(starE1**2.0 + starE2**2.0)) of the stars used in the PSF model true
starUnNormalizedEMedian double Median un-normalized ellipticity (sqrt((starXX - starYY)**2.0 + (2.0*starXY)**2.0)) of the stars used in the PSF model pixel**2 true