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Description: Contains the metadata describing the stacked image produced from the combination of a set of single epoch exposures. The nature of the stack is given by the StackTypeID. The astrometric and photometric calibration of the stacked image are listed.
NameUnitData TypeSizeDefault ValueDescription
stackImageIDdimensionlessBIGINT8NAUnique stack identifier.
batchIDdimensionlessBIGINT8NAInternal database batch identifier.
surveyIDdimensionlessTINYINT1NASurvey identifier. Details in the Survey table.
filterIDdimensionlessTINYINT1NAFilter identifier. Details in the Filter table.
stackTypeIDdimensionlessTINYINT10Stack type identifier. Details in the StackType table.
tessIDdimensionlessTINYINT10Tessellation identifier. Details in the TessellationType table.
projectionIDdimensionlessSMALLINT2-1Projection cell identifier.
skyCellIDdimensionlessTINYINT1255Skycell region identifier.
photoCalIDdimensionlessINT4NAPhotometric calibration identifier. Details in the PhotoCal table.
analysisVerdimensionlessVARCHAR(100)100 IPP software analysis release version.
md5sumdimensionlessVARCHAR(100)100 IPP MD5 Checksum.
expTimesecondsREAL4-999Exposure time of the stack. Necessary for converting listed fluxes and magnitudes back to measured ADU counts.
nP2ImagesdimensionlessSMALLINT2-999Number of input exposures/frames contributing to this stack.
detectionThresholdmagnitudesREAL4-999Reference magnitude for detection efficiency calculation.
astroScatdimensionlessREAL4-999Measurement of the calibration (not astrometric error) defined to be the sum in quadrature of the standard deviations in the X and Y directions.
photoScatdimensionlessREAL4-999Photometric scatter relative to reference catalog.
nAstroRefdimensionlessINT4-999Number of astrometric reference sources.
nPhotoRefdimensionlessINT4-999Number of photometric reference sources.
recalAstroScatXarcsecREAL4-999Measurement of the re-calibration (not astrometric error) in the X direction.
recalAstroScatYarcsecREAL4-999Measurement of the re-calibration (not astrometric error) in the Y direction.
recalNAstroStarsdimensionlessINT4-999Number of astrometric reference sources used in recalibration.
recalphotoScatmagnitudesREAL4-999Photometric scatter relative to reference catalog.
recalNPhotoStarsdimensionlessINT4-999Number of astrometric reference sources used in recalibration.
psfModelIDdimensionlessINT4-999PSF model identifier.
psfFWHMarcsecREAL4-999Mean PSF full width at half maximum at image center.
psfWidMajorarcsecREAL4-999PSF major axis FWHM at image center.
psfWidMinorarcsecREAL4-999PSF minor axis FWHM at image center.
psfThetadegreesREAL4-999PSF major axis orientation at image center.
photoZeromagnitudesREAL4-999Locally derived photometric zero point for this stack.
ctype1dimensionlessVARCHAR(100)100 Name of astrometric projection in right ascension.
ctype2dimensionlessVARCHAR(100)100 Name of astrometric projection in declination.
crval1degreesFLOAT8-999Right ascension corresponding to reference pixel.
crval2degreesFLOAT8-999Declination corresponding to reference pixel.
crpix1sky pixelsFLOAT8-999Reference pixel for right ascension.
crpix2sky pixelsFLOAT8-999Reference pixel for declination.
cdelt1degrees/pixelFLOAT8-999Pixel scale in right ascension.
cdelt2degrees/pixelFLOAT8-999Pixel scale in declination.
pc001001dimensionlessFLOAT8-999Linear transformation matrix element between image pixel x and right ascension.
pc001002dimensionlessFLOAT8-999Linear transformation matrix element between image pixel y and right ascension.
pc002001dimensionlessFLOAT8-999Linear transformation matrix element between image pixel x and declination.
pc002002dimensionlessFLOAT8-999Linear transformation matrix element between image pixel y and declination.
processingVersiondimensionlessTINYINT1NAData release version.
tbd7