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

Description: Contains single epoch photometry of individual detections from a single exposure. The identifiers connecting the detection back to the original image and to the object association are provided. PSF, aperture, and Kron (1980) photometry are included, along with sky and detector coordinate positions. References: Kron, R. G. 1980, ApJS, 43, 305. |
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Name | Unit | Data Type | Size | Default Value | Description |
---|---|---|---|---|---|

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

uniquePspsP2id | dimensionless | BIGINT | 8 | NA | Unique internal PSPS detection identifier. |

detectID | dimensionless | BIGINT | 8 | NA | Unique detection identifier. |

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

ippDetectID | dimensionless | BIGINT | 8 | NA | IPP internal detection identifier. |

filterID | dimensionless | TINYINT | 1 | NA | Filter identifier. Details in the Filter table. |

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

imageID | dimensionless | BIGINT | 8 | NA | Unique image identifier. Constructed as (100 * frameID + ccdID). |

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

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

obsTime | days | FLOAT | 8 | -999 | Modified Julian Date at the midpoint of the observation. Note these are international atomic time rather than UTC, so if you want UTC times you will need to add 34 or 35 seconds to correct for leap seconds. |

xPos | raw pixels | REAL | 4 | -999 | PSF x center location. |

yPos | raw pixels | REAL | 4 | -999 | PSF y center location. |

xPosErr | raw pixels | REAL | 4 | -999 | Error in PSF x center location. |

yPosErr | raw pixels | REAL | 4 | -999 | Error in PSF y center location. |

pltScale | arcsec/pixel | REAL | 4 | -999 | Local plate scale at this location. |

posAngle | degrees | REAL | 4 | -999 | Position angle (sky-to-chip) at this location. |

ra | degrees | FLOAT | 8 | -999 | Right ascension. |

dec | degrees | FLOAT | 8 | -999 | Declination. |

raErr | arcsec | REAL | 4 | -999 | Right ascension error. |

decErr | arcsec | REAL | 4 | -999 | Declination error. |

extNSigma | dimensionless | REAL | 4 | 0 | An extendedness measure based on the deviation between PSF and Kron (1980) magnitudes, normalized by the PSF magnitude uncertainty. |

zp | magnitudes | REAL | 4 | 0 | Photometric zeropoint. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. |

telluricExt | magnitudes | REAL | 4 | NA | Estimated Telluric extinction due to non-photometric observing conditions. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. |

expTime | seconds | REAL | 4 | -999 | Exposure time of the frame/exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. |

airMass | dimensionless | REAL | 4 | 0 | Airmass at midpoint of the exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. |

psfFlux | Janskys | REAL | 4 | -999 | Flux from PSF fit. |

psfFluxErr | Janskys | REAL | 4 | -999 | Error on flux from PSF fit. |

psfMajorFWHM | arcsec | REAL | 4 | -999 | PSF major axis FWHM. |

psfMinorFWHM | arcsec | REAL | 4 | -999 | PSF minor axis FWHM. |

psfTheta | degrees | REAL | 4 | -999 | PSF major axis orientation. |

psfCore | dimensionless | REAL | 4 | -999 | PSF core parameter k, where F = F0 / (1 + k r^2 + r^3.33). |

psfQf | dimensionless | REAL | 4 | -999 | PSF coverage factor. |

psfQfPerfect | dimensionless | REAL | 4 | -999 | PSF weighted fraction of pixels totally unmasked. |

psfChiSq | dimensionless | REAL | 4 | -999 | Reduced chi squared value of the PSF model fit. |

psfLikelihood | dimensionless | REAL | 4 | -999 | Likelihood that this detection is best fit by a PSF. |

momentXX | arcsec^2 | REAL | 4 | -999 | Second moment M_xx. |

momentXY | arcsec^2 | REAL | 4 | -999 | Second moment M_xy. |

momentYY | arcsec^2 | REAL | 4 | -999 | Second moment M_yy. |

momentR1 | arcsec | REAL | 4 | -999 | First radial moment. |

momentRH | arcsec^0.5 | REAL | 4 | -999 | Half radial moment (r^0.5 weighting). |

momentM3C | arcsec^2 | REAL | 4 | -999 | Cosine of trefoil second moment term: r^2 cos(3 theta) = M_xxx - 3 * M_xyy. |

momentM3S | arcsec^2 | REAL | 4 | -999 | Sine of trefoil second moment: r^2 sin (3 theta) = 3 * M_xxy - M_yyy. |

momentM4C | arcsec^2 | REAL | 4 | -999 | Cosine of quadrupole second moment: r^2 cos (4 theta) = M_xxxx - 6 * M_xxyy + M_yyyy. |

momentM4S | arcsec^2 | REAL | 4 | -999 | Sine of quadrupole second moment: r^2 sin (4 theta) = 4 * M_xxxy - 4 * M_xyyy. |

apFlux | Janskys | REAL | 4 | -999 | Flux in seeing-dependent aperture. |

apFluxErr | Janskys | REAL | 4 | -999 | Error on flux in seeing-dependent aperture. |

apFillF | dimensionless | REAL | 4 | -999 | Aperture fill factor. |

apRadius | arcsec | REAL | 4 | -999 | Aperture radius. |

kronFlux | Janskys | REAL | 4 | -999 | Kron (1980) flux. |

kronFluxErr | Janskys | REAL | 4 | -999 | Error on Kron (1980) flux. |

kronRad | arcsec | REAL | 4 | -999 | Kron (1980) radius. |

sky | Janskys/arcsec^2 | REAL | 4 | -999 | Background sky level. |

skyErr | Janskys/arcsec^2 | REAL | 4 | -999 | Error in background sky level. |

infoFlag | dimensionless | BIGINT | 8 | 0 | Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags. |

infoFlag2 | dimensionless | INT | 4 | 0 | Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags2. |

infoFlag3 | dimensionless | INT | 4 | 0 | Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags3. |

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