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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
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. In the PS1 nomenclature, Detections are sources found in a single exposure, while Objects are either collections of Detections matched across exposures, or sources found in stacked images that combine multiple epochs to produce deeper detection limits. Only Objects are included in DR1; Detections will be included in DR2. Acknowledging Pan-STARRS1 in publications: The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been 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, 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), the Los Alamos National Laboratory, and 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
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 zKmag (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 gKmag (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.
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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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