The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.
Description: Contains the positional and photometric information for point-source photometry of stack detections. The information for all filters are joined into a single row, with metadata indicating if this stack object represents the primary detection. Due to overlaps in the stack tessellations, an object may appear in multiple stack images. The primary detection is the unique detection from the stack image that provides the best coverage with minimal projection stretching. All other detections of the object in that filter are secondary, regardless of their properties. The detection flagged as best is the primary detection if that detection has a psfQf value greater than 0.98; if that is not met, then any of the primary or secondary detections with the highest psfQf value is flagged as best. References: Kron, R. G. 1980, ApJS, 43, 305; Magnier et al. 2015, in prep. Name Unit Data Type Size Default Value Description objID dimensionless BIGINT 8 NA Unique object identifier. uniquePspsSTid dimensionless BIGINT 8 NA Unique internal PSPS stack identifier. ippObjID dimensionless BIGINT 8 NA IPP internal object identifier. surveyID dimensionless TINYINT 1 NA Survey identifier. Details in the Survey table. tessID dimensionless TINYINT 1 0 Tessellation identifier. Details in the TessellationType table. projectionID dimensionless SMALLINT 2 -1 Projection cell identifier. skyCellID dimensionless TINYINT 1 255 Skycell region identifier. randomStackObjID dimensionless FLOAT 8 NA Random value drawn from the interval between zero and one. primaryDetection dimensionless TINYINT 1 255 Identifies if this row is the primary stack detection. Note that in the DR1 database, about 0.5% of the objects have more than one entry with primaryDetection=1. This may be fixed in a future modification of the DR2 database. Note also that as primaryDetection is entirely a geometric issue within a skycell, it is possible for an object (particularly if near the detection limit) to be undetected on the primary area within a skycell, but to appear on the overlapping non-primary area in an adjacent skycell. Such objects will not have any measurement which is flagged as a primaryDetection. bestDetection dimensionless TINYINT 1 255 Identifies if this row is the best detection. The entries in this column are currently corrupted in the DR2 database and should not be used. We recommend using the primaryDetection flag instead (although it also has shortcomings - see above). This is planned to be fixed in DR2.1. dvoRegionID dimensionless INT 4 -1 Internal DVO region identifier. processingVersion dimensionless TINYINT 1 NA Data release version. gippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. gstackDetectID dimensionless BIGINT 8 NA Unique stack detection identifier. gstackImageID dimensionless BIGINT 8 NA Unique stack identifier for g filter detection. gra degrees FLOAT 8 -999 Right ascension from g filter stack detection. gdec degrees FLOAT 8 -999 Declination from g filter stack detection. graErr arcsec REAL 4 -999 Right ascension error from g filter stack detection. gdecErr arcsec REAL 4 -999 Declination error from g filter stack detection. gEpoch days FLOAT 8 -999 Modified Julian Date of the mean epoch of images contributing to the the g-band stack (equinox J2000). gPSFMag AB magnitudes REAL 4 -999 PSF magnitude from g filter stack detection. gPSFMagErr AB magnitudes REAL 4 -999 Error in PSF magnitude from g filter stack detection. gApMag AB magnitudes REAL 4 -999 Aperture magnitude from g filter stack detection. gApMagErr AB magnitudes REAL 4 -999 Error in aperture magnitude from g filter stack detection. gKronMag AB magnitudes REAL 4 -999 Kron (1980) magnitude from g filter stack detection. gKronMagErr AB magnitudes REAL 4 -999 Error in Kron (1980) magnitude from g filter stack detection. ginfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the g filter stack photometry. Values listed in DetectionFlags. ginfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the g filter stack photometry. Values listed in DetectionFlags2. ginfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the g filter stack photometry. Values listed in DetectionFlags3. gnFrames dimensionless INT 4 -999 Number of input frames/exposures contributing to the g filter stack detection. rippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. rstackDetectID dimensionless BIGINT 8 NA Unique stack detection identifier. rstackImageID dimensionless BIGINT 8 NA Unique stack identifier for r filter detection. rra degrees FLOAT 8 -999 Right ascension from r filter stack detection. rdec degrees FLOAT 8 -999 Declination from r filter stack detection. rraErr arcsec REAL 4 -999 Right ascension error from r filter stack detection. rdecErr arcsec REAL 4 -999 Declination error from r filter stack detection. rEpoch days FLOAT 8 -999 Modified Julian Date of the mean epoch of images contributing to the the r-band stack (equinox J2000). rPSFMag AB magnitudes REAL 4 -999 PSF magnitude from r filter stack detection. rPSFMagErr AB magnitudes REAL 4 -999 Error in PSF magnitude from r filter stack detection. rApMag AB magnitudes REAL 4 -999 Aperture magnitude from r filter stack detection. rApMagErr AB magnitudes REAL 4 -999 Error in aperture magnitude from r filter stack detection. rKronMag AB magnitudes REAL 4 -999 Kron (1980) magnitude from r filter stack detection. rKronMagErr AB magnitudes REAL 4 -999 Error in Kron (1980) magnitude from r filter stack detection. rinfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the r filter stack photometry. Values listed in DetectionFlags. rinfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the r filter stack photometry. Values listed in DetectionFlags2. rinfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the r filter stack photometry. Values listed in DetectionFlags3. rnFrames dimensionless INT 4 -999 Number of input frames/exposures contributing to the r filter stack detection. iippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. istackDetectID dimensionless BIGINT 8 NA Unique stack detection identifier. istackImageID dimensionless BIGINT 8 NA Unique stack identifier for i filter detection. ira degrees FLOAT 8 -999 Right ascension from i filter stack detection. idec degrees FLOAT 8 -999 Declination from i filter stack detection. iraErr arcsec REAL 4 -999 Right ascension error from i filter stack detection. idecErr arcsec REAL 4 -999 Declination error from i filter stack detection. iEpoch days FLOAT 8 -999 Modified Julian Date of the mean epoch of images contributing to the the i-band stack (equinox J2000). iPSFMag AB magnitudes REAL 4 -999 PSF magnitude from i filter stack detection. iPSFMagErr AB magnitudes REAL 4 -999 Error in PSF magnitude from i filter stack detection. iApMag AB magnitudes REAL 4 -999 Aperture magnitude from i filter stack detection. iApMagErr AB magnitudes REAL 4 -999 Error in aperture magnitude from i filter stack detection. iKronMag AB magnitudes REAL 4 -999 Kron (1980) magnitude from i filter stack detection. iKronMagErr AB magnitudes REAL 4 -999 Error in Kron (1980) magnitude from i filter stack detection. iinfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the i filter stack photometry. Values listed in DetectionFlags. iinfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the i filter stack photometry. Values listed in DetectionFlags2. iinfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the i filter stack photometry. Values listed in DetectionFlags3. inFrames dimensionless INT 4 -999 Number of input frames/exposures contributing to the i filter stack detection. zippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. zstackDetectID dimensionless BIGINT 8 NA Unique stack detection identifier. zstackImageID dimensionless BIGINT 8 NA Unique stack identifier for z filter detection. zra degrees FLOAT 8 -999 Right ascension from z filter stack detection. zdec degrees FLOAT 8 -999 Declination from z filter stack detection. zraErr arcsec REAL 4 -999 Right ascension error from z filter stack detection. zdecErr arcsec REAL 4 -999 Declination error from z filter stack detection. zEpoch days FLOAT 8 -999 Modified Julian Date of the mean epoch of images contributing to the the z-band stack (equinox J2000). zPSFMag AB magnitudes REAL 4 -999 PSF magnitude from z filter stack detection. zPSFMagErr AB magnitudes REAL 4 -999 Error in PSF magnitude from z filter stack detection. zApMag AB magnitudes REAL 4 -999 Aperture magnitude from z filter stack detection. zApMagErr AB magnitudes REAL 4 -999 Error in aperture magnitude from z filter stack detection. zKronMag AB magnitudes REAL 4 -999 Kron (1980) magnitude from z filter stack detection. zKronMagErr AB magnitudes REAL 4 -999 Error in Kron (1980) magnitude from z filter stack detection. zinfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the z filter stack photometry. Values listed in DetectionFlags. zinfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the z filter stack photometry. Values listed in DetectionFlags2. zinfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the z filter stack photometry. Values listed in DetectionFlags3. znFrames dimensionless INT 4 -999 Number of input frames/exposures contributing to the z filter stack detection. yippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. ystackDetectID dimensionless BIGINT 8 NA Unique stack detection identifier. ystackImageID dimensionless BIGINT 8 NA Unique stack identifier for y filter detection. yra degrees FLOAT 8 -999 Right ascension from y filter stack detection. ydec degrees FLOAT 8 -999 Declination from y filter stack detection. yraErr arcsec REAL 4 -999 Right ascension error from y filter stack detection. ydecErr arcsec REAL 4 -999 Declination error from y filter stack detection. yEpoch days FLOAT 8 -999 Modified Julian Date of the mean epoch of images contributing to the the y-band stack (equinox J2000). yPSFMag AB magnitudes REAL 4 -999 PSF magnitude from y filter stack detection. yPSFMagErr AB magnitudes REAL 4 -999 Error in PSF magnitude from y filter stack detection. yApMag AB magnitudes REAL 4 -999 Aperture magnitude from y filter stack detection. yApMagErr AB magnitudes REAL 4 -999 Error in aperture magnitude from y filter stack detection. yKronMag AB magnitudes REAL 4 -999 Kron (1980) magnitude from y filter stack detection. yKronMagErr AB magnitudes REAL 4 -999 Error in Kron (1980) magnitude from y filter stack detection. yinfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the y filter stack photometry. Values listed in DetectionFlags. yinfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the y filter stack photometry. Values listed in DetectionFlags2. yinfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the y filter stack photometry. Values listed in DetectionFlags3. ynFrames dimensionless INT 4 -999 Number of input frames/exposures contributing to the y filter stack detection.
