The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.


Description: Contains the positional information for objects in a number of coordinate systems. The objects associate single epoch detections and the stacked detections within a one arcsecond radius. The mean position from the single epoch data is used as the basis for coordinates when available, or the position of an object in the stack when it is not. The right ascension and declination for both the stack and single epoch mean is provided. The number of detections in each filter from single epoch data is listed, along with which filters the object has a stack detection. References: Szalay, A. S., Gray, J., Fekete, G., et al. 2007, arXiv:cs/0701164.
NameUnitData TypeSizeDefault ValueDescription
objNamedimensionlessVARCHAR(32)32NAIAU name for this object.
objPSONamedimensionlessVARCHAR(32)32NAAlternate Pan-STARRS name for this object.
objAltName1dimensionlessVARCHAR(32)32NAAlternate name for this object.
objAltName2dimensionlessVARCHAR(32)32
Altername name for this object.
objAltName3dimensionlessVARCHAR(32)32
Altername name for this object.
objPopularNamedimensionlessVARCHAR(140)140
Well known name for this object.
objIDdimensionlessBIGINT8NAUnique object identifier.
uniquePspsOBiddimensionlessBIGINT8NAUnique internal PSPS object identifier.
ippObjIDdimensionlessBIGINT8NAIPP internal object identifier.
surveyIDdimensionlessTINYINT1NASurvey identifier. Details in the Survey table.
htmIDdimensionlessBIGINT8NAHierarchical triangular mesh (Szalay 2007) index.
zoneIDdimensionlessINT4NALocal zone index, found by dividing the sky into bands of declination 1/2 arcminute in height: zoneID = floor((90 + declination)/0.0083333).
tessIDdimensionlessTINYINT10Tessellation identifier. Details in the TessellationType table.
projectionIDdimensionlessSMALLINT2-1Projection cell identifier.
skyCellIDdimensionlessTINYINT1255Skycell region identifier.
randomIDdimensionlessFLOAT8NARandom value drawn from the interval between zero and one.
batchIDdimensionlessBIGINT8NAInternal database batch identifier.
dvoRegionIDdimensionlessINT4-1Internal DVO region identifier.
processingVersiondimensionlessTINYINT1NAData release version.
objInfoFlagdimensionlessINT40Information flag bitmask indicating details of the photometry. Values listed in ObjectInfoFlags and here
qualityFlagdimensionlessTINYINT10Subset of objInfoFlag denoting whether this object is real or a likely false positive. Values listed in ObjectQualityFlags and here
raStackdegreesFLOAT8-999Right ascension from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information.
decStackdegreesFLOAT8-999Declination from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information.
raStackErrarcsecREAL4-999Right ascension standard deviation from stack detections.
decStackErrarcsecREAL4-999Declination standard deviation from stack detections.
raMeandegreesFLOAT8-999Right ascension from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean.
decMeandegreesFLOAT8-999Declination from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean.
raMeanErrarcsecREAL4-999Right ascension standard deviation from single epoch detections.
decMeanErrarcsecREAL4-999Declination standard deviation from single epoch detections.
epochMeandaysFLOAT8-999Modified Julian Date of the mean epoch corresponding to raMean, decMean (equinox J2000). Note that Gaia DR1 data is sometimes included in the mean position (see the FAQ for details); in those cases, the epochMean value is near the Gaia DR1 epoch 2015.5 = MJD 15023.  As a result, epochMean is not necessarily near the mean value of the PS1 measurement dates.
posMeanChisqdimensionlessREAL4-999Reduced chi squared value of mean position.
cxdimensionlessFLOAT8NACartesian x on a unit sphere.
cydimensionlessFLOAT8NACartesian y on a unit sphere.
czdimensionlessFLOAT8NACartesian z on a unit sphere.
lambdadegreesFLOAT8-999Ecliptic longitude.
betadegreesFLOAT8-999Ecliptic latitude.
ldegreesFLOAT8-999Galactic longitude.
bdegreesFLOAT8-999Galactic latitude.
nStackObjectRowsdimensionlessSMALLINT2-999Number of independent StackObjectThin rows associated with this object.
nStackDetectionsdimensionlessSMALLINT2-999Number of stack detections.
nDetectionsdimensionlessSMALLINT2-999Number of single epoch detections in all filters.
ngdimensionlessSMALLINT2-999Number of single epoch detections in g filter.
nrdimensionlessSMALLINT2-999Number of single epoch detections in r filter.
nidimensionlessSMALLINT2-999Number of single epoch detections in i filter.
nzdimensionlessSMALLINT2-999Number of single epoch detections in z filter.
nydimensionlessSMALLINT2-999Number of single epoch detections in y filter.

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