ACDS V10.0 - Detailed Description of II/349

ACDS V10.0 - Sun Jan 19 02:07:05 CET 2025

| # Detailed Description of II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    II/349       The Pan-STARRS release 1 (PS1) Survey - DR1       (Chambers+, 2016)
    ================================================================================
    The Pan-STARRS1 (PS1) release
        Chambers K.C. et al.

       =2016arXiv161205560C
       =2016arXiv161205240M
       =2016arXiv161205245W
       =2016arXiv161205244M
       =2016arXiv161205242M
       =2016arXiv161205243F
       =2017yCat.2349....0C
    ================================================================================
    ADC_Keywords: Photometry, ugriz ; Surveys ; Positional data

    Mission_Name: Pan-STARRS

    Keywords: catalogs; surveys

    Description:
        The Panoramic Survey Telescope and Rapid Response System (Pan-STARRS)
        is a system for wide-field astronomical imaging developed and operated
        by the Institute for Astronomy at the University of Hawaii.
        Pan-STARRS1 (PS1) is the first part of Pan-STARRS to be completed and
        is the basis for Data Release 1 (DR1). The PS1 survey used a 1.8m
        telescope and its 1.4 Gigapixel camera (GPC1) to image the sky in five
        broadband filters (g, r, i, z, y). PS1 took approximately 370000
        exposures from 2010 to 2015.

        The PS1 camera surveyed the sky using 5 filters: g, r, i, z, and y.
        The effective wavelengths (and spectral resolutions) of these 5
        filters are 481nm (R=3.5), 617nm (R=4.4), 752nm (R=5.8), 866nm
        (R=8.3), and 962nm (R=11.6), respectively. Please refer to Table 4 in
        Tonry+ (2012, J/ApJ/750/99) for bandpass details. Schlafly+
        (2012ApJ...756..158S) provides updated zeropoints in Table 1.

        Data for this catalog has been retrieved from STScI and was built from
        ObjectThin and StackObjectThin tables with nDetections>2.

    Acknowledging Pan-STARRS1 in publications:
        The Pan-STARRS1 Surveys were made possible through contributions by
        the Institute for Astronomy, the University of Hawaii, the Pan-STARRS
        Project Office, the Max-Planck Society and its participating
        institutes, the Max Planck Institute for Astronomy, Heidelberg and the
        Max Planck Institute for Extraterrestrial Physics, Garching, The Johns
        Hopkins University, Durham University, the University of Edinburgh,
        the Queen's University Belfast, the Harvard-Smithsonian Center for
        Astrophysics, the Las Cumbres Observatory Global Telescope Network
        Incorporated, the National Central University of Taiwan, the Space
        Telescope Science Institute, and the National Aeronautics and Space
        Administration under Grant No. NNX08AR22G issued through the Planetary
        Science Division of the NASA Science Mission Directorate, the National
        Science Foundation Grant No. AST-1238877, the University of Maryland,
        Eotvos Lorand University (ELTE), and the Los Alamos National
        Laboratory.The Pan-STARRS1 Surveys are archived at the Space Telescope
        Science Institute (STScI) and can be accessed through MAST, the
        Mikulski Archive for Space Telescopes. Additional support for the
        Pan-STARRS1 public science archive is provided by the Gordon and Betty
        Moore Foundation.

        In addition, please cite the following papers describing the
        instrument, survey, and data analysis as appropriate:

        The Pan-STARRS1 Surveys, Chambers, K.C., et al. 2016, arXiv:1612.05560
        Pan-STARRS Data Processing System,
          Magnier, E. A., et al. 2016, arXiv:1612.05240
        Pan-STARRS Pixel Processing: Detrending, Warping, Stacking,
          Waters, C. Z., et al. 2016, arXiv:1612.05245
        Pan-STARRS Pixel Analysis: Source Detection and Characterization,
          Magnier, E. A., et al. 2016, arXiv:1612.05244
        Pan-STARRS Photometric and Astrometric Calibration,
          Magnier, E. A., et al. 2016, arXiv:1612.05242
        The Pan-STARRS1 Database and Data Products,
          Flewelling, H. A., et al. 2016, arXiv:1612.05243

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × ps1.sam          511     1000   Pan-STARRS DR1 catalogue, sample output
                                      (on a total of 1,919,106,885 sources)

    See also:
      http://panstarrs.stsci.edu/ : The Pan-STARRS1 data archive home page

    Byte-by-byte Description of file:  ps1.sam

       Bytes Format  Units   Label    Explanations

       1- 13  F13.9  deg     RAdeg    Right ascension (J2000) (weighted mean)
                                       at epoch "Epoch" (raMean) (1)
      15- 27  F13.9  deg     DEdeg    Declination (J2000) (weighted mean)
                                       at epoch "Epoch" (decMean) (1)
      29- 46  I18    ---     objID    Unique object identifier (objID)
      48- 51  I4     ---     cell     [559/2643] Projection cell identifier
                                       (projectionID)
      53- 54  I2     ---     sky      [0/99] Skycell region identifier
                                       (skyCellID)
      56- 65  I10    ---     f_objID  Information flag bitmask indicating
                                       details of the photometry (objInfoFlag) (2)
      67- 69  I3     ---     Qual     Subset of objInfoFlag denoting
                                       whether this object is real or
                                       a likely false positive (qualityFlag) (3)
      71- 82  F12.4  arcsec  e_RAdeg  ? Right ascension standard deviation
                                       from single epoch detections (raMeanErr)
      84- 95  F12.4  arcsec  e_DEdeg  ? Declination standard deviation
                                       from single epoch detections (decMeanErr)
      97-111  F15.9  d       Epoch    ? Modified Julian Date (MJD) of the mean
                                       epoch (epochMean)
     113-114  I2     ---     Ns       [0/50] Number of stack detections
                                       (nStackDetections)
     116-118  I3     ---     Nd       [3/369] Number of single epoch detections in
                                       all filters (nDetections)
     120-121  I2     ---     Ng       [0/52] Number of single epoch detections in
                                       g filter (ng)
     123-125  I3     ---     Nr       [0/368] Number of single epoch detections in
                                       r filter (nr)
     127-128  I2     ---     Ni       [0/88] Number of single epoch detections in
                                       i filter (ni)
     130-131  I2     ---     Nz       [0/44] Number of single epoch detections in
                                       z filter (nz)
     133-134  I2     ---     Ny       [0/53] Number of single epoch detections in
                                       y filter (ny)
     136-143  F8.6   ---     gPSFf    ? Maximum PSF weighted fraction of pixels
                                       totally unmasked from g filter detections
                                       (gQfPerfect)
     145-152  F8.4   mag     gmag     [-33/33]? Mean PSF AB magnitude from g filter
                                       (4866Å) detections (gMeanPSFMag)
     154-159  F6.4   mag     e_gmag   [0/0.5]? Error in gmag (gMeanPSFMagErr)
     161-167  F7.4   mag     gmagStd  ? Standard deviation of PSF AB magnitudes from
                                       g filter detections (gMeanPSFMagStd)
     169-170  I2     ---     o_gmag   [0/49] Number of measurements included in
                                       mean PSF magnitude from g filter detections
                                       (gMeanPSFMagNpt)
     172-178  F7.4   mag     b_gmag   ? Minimum PSF AB magnitude from g filter
                                       detections (gMeanPSFMagMin)
     180-186  F7.4   mag     B_gmag   ? Maximum PSF AB magnitude from g filter
                                       detections (gMeanPSFMagMax)
     188-194  F7.4   mag     gKmag    ? Mean Kron (1980) AB magnitude from g
                                       filter detections (gMeanKronMag)
     196-201  F6.4   mag     e_gKmag  ? Error in gKmag (gMeanKronMagErr)
     203-210  I8     ---     gFlags   Information flag bitmask for mean object
                                       from g filter detections (gFlags) (4)
     212-219  F8.6   ---     rPSFf    ? Maximum PSF weighted fraction of pixels
                                       totally unmasked from r filter detections
                                       (rQfPerfect)
     221-227  F7.4   mag     rmag     [-6/30]? Mean PSF AB magnitude from r filter
                                       (6215Å) detections (rMeanPSFMag)
     229-234  F6.4   mag     e_rmag   [0/0.5]? Error in rmag (rMeanPSFMagErr)
     236-242  F7.4   mag     rmagStd  ? Standard deviation of PSF AB magnitudes
                                       from r filter detections (rMeanPSFMagStd)
     244-246  I3     ---     o_rmag   [0/179] Number of measurements included in
                                       mean PSF magnitude from r filter detections
                                       (rMeanPSFMagNpt)
     248-254  F7.4   mag     b_rmag   ? Minimum PSF AB magnitude from r filter
                                       detections (rMeanPSFMagMin)
     256-262  F7.4   mag     B_rmag   ? Maximum PSF AB magnitude from r filter
                                       detections (rMeanPSFMagMax)
     264-270  F7.4   mag     rKmag    ? Mean Kron (1980) AB magnitude from r filter
                                       detections (rMeanKronMag)
     272-277  F6.4   mag     e_rKmag  ? Error in rKmag (rMeanKronMagErr)
     279-286  I8     ---     rFlags   Information flag bitmask for mean object
                                       from r filter detections (rFlags) (4)
     288-295  F8.6   ---     iPSFf    ? Maximum PSF weighted fraction of pixels
                                       totally unmasked from i filter detections
                                       (iQfPerfect)
     297-303  F7.4   mag     imag     [-5/30]? Mean PSF AB magnitude from i filter
                                       (7545Å) detections (iMeanPSFMag)
     305-310  F6.4   mag     e_imag   [0/0.5]? Error in imag (iMeanPSFMagErr)
     312-318  F7.4   mag     imagStd  ? Standard deviation of PSF AB magnitudes
                                       from i filter detections (iMeanPSFMagStd)
     320-321  I2     ---     o_imag   [0/85] Number of measurements included in
                                       mean PSF magnitude from i filter detections
                                       (iMeanPSFMagNpt)
     323-329  F7.4   mag     b_imag   ? Minimum PSF AB magnitude from i filter
                                       detections (iMeanPSFMagMin)
     331-337  F7.4   mag     B_imag   ? Maximum PSF AB magnitude from i filter
                                       detections (iMeanPSFMagMax)
     339-345  F7.4   mag     iKmag    ? Mean Kron (1980) AB magnitude from i filter
                                       detections (iMeanKronMag)
     347-352  F6.4   mag     e_iKmag  ? Error in iKmag (iMeanKronMagErr)
     354-361  I8     ---     iFlags   Information flag bitmask for mean object
                                       from i filter detections (iFlags) (4)
     363-370  F8.6   ---     zPSFf    ? Maximum PSF weighted fraction of pixels
                                       totally unmasked from z filter detections
                                       (zQfPerfect)
     372-378  F7.4   mag     zmag     [-5/29]? Mean PSF AB magnitude from z filter
                                       (8679Å) detections (zMeanPSFMag)
     380-385  F6.4   mag     e_zmag   [0/0.5]? Error in zmag (zMeanPSFMagErr)
     387-393  F7.4   mag     zmagStd  ? Standard deviation of PSF AB magnitudes
                                       from z filter detections (zMeanPSFMagStd)
     395-396  I2     ---     o_zmag   [0-37] Number of measurements included in mean
                                       PSF magnitude from z filter detections
                                       (zMeanPSFMagNpt)
     398-404  F7.4   mag     b_zmag   ? Minimum PSF AB magnitude from z filter
                                       detections (zMeanPSFMagMin)
     406-412  F7.4   mag     B_zmag   ? Maximum PSF AB magnitude from z filter
                                       detections (zMeanPSFMagMax)
     414-420  F7.4   mag     zKmag    ? Mean Kron (1980) AB magnitude from z filter
                                       detections (zMeanKronMag)
     422-427  F6.4   mag     e_zKmag  ? Error in zKmag (zMeanKronMagErr)
     429-436  I8     ---     zFlags   Information flag bitmask for mean object
                                       from z filter detections (zFlags) (4)
     438-445  F8.6   ---     yPSFf    ? Maximum PSF weighted fraction of pixels
                                       totally unmasked from y filter detections
                                       (yQfPerfect)
     447-453  F7.4   mag     ymag     [-5/29]? Mean PSF AB magnitude from y filter
                                       (9633Å) detections (yMeanPSFMag)
     455-460  F6.4   mag     e_ymag   [0/0.5]? Error in ymag (yMeanPSFMagErr)
     462-468  F7.4   mag     ymagStd  ? Standard deviation of PSF AB magnitudes
                                       from y filter detections (yMeanPSFMagStd)
     470-471  I2     ---     o_ymag   [0/51] Number of measurements included in mean
                                       PSF magnitude from y filter detections
                                       (yMeanPSFMagNpt)
     473-479  F7.4   mag     b_ymag   ? Minimum PSF AB magnitude from y filter
                                       detections (yMeanPSFMagMin)
     481-487  F7.4   mag     B_ymag   ? Maximum PSF AB magnitude from y filter
                                       detections (yMeanPSFMagMax)
     489-495  F7.4   mag     yKmag    ? Mean Kron (1980) AB magnitude from y filter
                                       detections (yMeanKronMag)
     497-502  F6.4   mag     e_yKmag  ? Error in yKmag (yMeanKronMagErr)
     504-511  I8     ---     yFlags   Information flag bitmask for mean object
                                       from y filter detections (yFlags) (4)

    Note (1): Coordinates from single epoch detections (weighted mean) in equinox
              J2000 at the mean epoch given by epochMean ("Epoch" column).
    Note (2): objInfoFlag from ObjectInfoFlags table:
              1 = Used within relphot (FEW); skip star.
              2 = Used within relphot (POOR); skip star.
              4 = object IDed with known ICRF quasar (may have ICRF position
                   measurement)
              8 = identified as likely QSO (Hernitschek+ 2015ApJ...801...45H),
                   PQSO>=0.60
             16 = identified as possible QSO (Hernitschek+ 2015ApJ...801...45H),
                   PQSO>=0.05
             32 = identified as likely RR Lyra (Hernitschek+ 2015ApJ...801...45H),
                   PRRLyra>=0.60
             64 = identified as possible RR Lyra (Hernitschek+ 2015ApJ...801...45H),
                   PRRLyra>=0.05
            128 = identified as a variable based on ChiSq
                   (Hernitschek+ 2015ApJ...801...45H)
            256 = identified as a non-periodic (stationary) transient
            512 = at least one detection identified with a known solar-system object
                   (asteroid or other).
           1024 = most detections identified with a known solar-system object
                   (asteroid or other).
           2048 = star with large proper motion
           4096 = simple weighted average position was used (no IRLS fitting)
           8192 = average position was fitted
          16384 = proper motion model was fitted
          32768 = parallax model was fitted
          65536 = average position used (not PM or PAR)
         131072 = proper motion used (not AVE or PAR)
         262144 = parallax used (not AVE or PM)
         524288 = mean astrometry could not be measured
        1048576 = stack position used for mean astrometry
        2097152 = mean astrometry used for stack position
        4194304 = failure to measure proper-motion model
        8388608 = extended in our data (eg, PS)
       16777216 = extended in external data (eg, 2MASS)
       33554432 = good-quality measurement in our data (eg,PS)
       67108864 = good-quality measurement in external data (eg, 2MASS)
      134217728 = good-quality object in the stack (>1 good stack measurement)
      268435456 = the primary stack measurements are the best measurements
      536870912 = suspect object in the stack (no more than 1 good measurement,
                   2 or more suspect or good stack measurement)
     1073741824 = poor-quality stack object (no more than 1 good or suspect
                   measurement)
    Note (3): Quality flags from ObjectQualityFlags:
         1 = Extended in our data (eg, PS)
         2 = Extended in external data (eg, 2MASS)
         4 = Good-quality measurement in our data (eg,PS)
         8 = Good-quality measurement in external data (eg, 2MASS)
        16 = good-quality object in the stack (>1 good stack measurement)
        32 = the primary stack measurements are the best measurements
        64 = suspect object in the stack (no more than 1 good measurement,
             2 or more suspect or good stack measurement)
       128 = poor-quality stack object (no more than 1 good or suspect measurement)
    Note (4): Flag values from ObjectFilterFlags table:
         1 = Used within relphot (SECFSTARFEW): skip star.
         2 = Used within relphot (SECFSTARPOOR): skip star.
         4 = Synthetic photometry used in average measurement.
         8 = Ubercal photometry used in average measurement.
        16 = PS1 photometry used in average measurement.
        32 = PS1 stack photometry exists.
        64 = Tycho photometry used for synthetic magnitudes.
       128 = Synthetic magnitudes repaired with zeropoint map.
       256 = Average magnitude calculated in 0th pass.
       512 = Average magnitude calculated in 1th pass.
      1024 = Average magnitude calculated in 2th pass.
      2048 = Average magnitude calculated in 3th pass.
      4096 = Average magnitude calculated in 4th pass.
      8192 = Extended in this band (PSPS only).
     16384 = PS1 stack photometry comes from primary skycell.

    History:
        Data has been retrieved from STScI through Bernie Shiao and Brian McLean
        whose help is gratefully acknowledged.
        This catalog was built from ObjectThin and StackObjectThin tables with
        nDetections>2.

    Acknowledgements:
        It is a pleasure to thank Brian McLean and Bernie Shiao (STScI),
        who provided us with the files to build this catalogue.
    ================================================================================
    (End)                     T. Boch, F.-X. Pineau, E. Perret [CDS]    07-Jul-2017