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. |
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Name | Unit | Data Type | Size | Default Value | Description |
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objName | dimensionless | VARCHAR(32) | 32 | NA | IAU name for this object. |

objPSOName | dimensionless | VARCHAR(32) | 32 | NA | Alternate Pan-STARRS name for this object. |

objAltName1 | dimensionless | VARCHAR(32) | 32 | NA | Alternate name for this object. |

objAltName2 | dimensionless | VARCHAR(32) | 32 | Altername name for this object. | |

objAltName3 | dimensionless | VARCHAR(32) | 32 | Altername name for this object. | |

objPopularName | dimensionless | VARCHAR(140) | 140 | Well known name for this object. | |

objID | dimensionless | BIGINT | 8 | NA | Unique object identifier. |

uniquePspsOBid | dimensionless | BIGINT | 8 | NA | Unique internal PSPS object identifier. |

ippObjID | dimensionless | BIGINT | 8 | NA | IPP internal object identifier. |

surveyID | dimensionless | TINYINT | 1 | NA | Survey identifier. Details in the Survey table. |

htmID | dimensionless | BIGINT | 8 | NA | Hierarchical triangular mesh (Szalay 2007) index. |

zoneID | dimensionless | INT | 4 | NA | Local zone index, found by dividing the sky into bands of declination 1/2 arcminute in height: zoneID = floor((90 + declination)/0.0083333). |

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. |

randomID | dimensionless | FLOAT | 8 | NA | Random value drawn from the interval between zero and one. |

batchID | dimensionless | BIGINT | 8 | NA | Internal database batch identifier. |

dvoRegionID | dimensionless | INT | 4 | -1 | Internal DVO region identifier. |

processingVersion | dimensionless | TINYINT | 1 | NA | Data release version. |

objInfoFlag | dimensionless | INT | 4 | 0 | Information flag bitmask indicating details of the photometry. Values listed in ObjectInfoFlags and here |

qualityFlag | dimensionless | TINYINT | 1 | 0 | Subset of objInfoFlag denoting whether this object is real or a likely false positive. Values listed in ObjectQualityFlags and here |

raStack | degrees | FLOAT | 8 | -999 | Right ascension from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information. |

decStack | degrees | FLOAT | 8 | -999 | Declination from stack detections, weighted mean value across filters, in equinox J2000. See StackObjectThin for stack epoch information. |

raStackErr | arcsec | REAL | 4 | -999 | Right ascension standard deviation from stack detections. |

decStackErr | arcsec | REAL | 4 | -999 | Declination standard deviation from stack detections. |

raMean | degrees | FLOAT | 8 | -999 | Right ascension from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean. |

decMean | degrees | FLOAT | 8 | -999 | Declination from single epoch detections (weighted mean) in equinox J2000 at the mean epoch given by epochMean. |

raMeanErr | arcsec | REAL | 4 | -999 | Right ascension standard deviation from single epoch detections. |

decMeanErr | arcsec | REAL | 4 | -999 | Declination standard deviation from single epoch detections. |

epochMean | days | FLOAT | 8 | -999 | Modified 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. |

posMeanChisq | dimensionless | REAL | 4 | -999 | Reduced chi squared value of mean position. |

cx | dimensionless | FLOAT | 8 | NA | Cartesian x on a unit sphere. |

cy | dimensionless | FLOAT | 8 | NA | Cartesian y on a unit sphere. |

cz | dimensionless | FLOAT | 8 | NA | Cartesian z on a unit sphere. |

lambda | degrees | FLOAT | 8 | -999 | Ecliptic longitude. |

beta | degrees | FLOAT | 8 | -999 | Ecliptic latitude. |

l | degrees | FLOAT | 8 | -999 | Galactic longitude. |

b | degrees | FLOAT | 8 | -999 | Galactic latitude. |

nStackObjectRows | dimensionless | SMALLINT | 2 | -999 | Number of independent StackObjectThin rows associated with this object. |

nStackDetections | dimensionless | SMALLINT | 2 | -999 | Number of stack detections. |

nDetections | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in all filters. |

ng | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in g filter. |

nr | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in r filter. |

ni | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in i filter. |

nz | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in z filter. |

ny | dimensionless | SMALLINT | 2 | -999 | Number of single epoch detections in y filter. |