ACDS V10.0 - Thu May 02 06:20:39 CEST 2019
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Detailed Description of II/349 :
The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
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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 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.
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