I/351 The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog (Tian+, 2020)
The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog.
Tian H.-J., Xu Y., Liu C., Rix H.-W., Sesar B., Goldman B.
<Astrophys. J. Suppl. Ser., 248, 28 (2020)>
=2020ApJS..248...28T 2020ApJS..248...28T
=2021yCat.1351....0T 2021yCat.1351....0T
ADC_Keywords: Proper motions ; Positional data ; Surveys
Keywords: Galaxy kinematics ; Astrometry ; Catalogs ; Galaxy dynamics ;
Proper motions
Abstract:
The Gaia + PanSTARRS1 (PS1) + Sloan Digital Sky Survey (SDSS) + Two
Micron All-Sky Survey (2MASS) (GPS1) catalog was released in 2017. It
delivered precise proper motions for around 350 million sources down
to a magnitude of r∼20mag. In this study, we present GPS1+, the
extension GPS1 catalog down to r∼22.5mag, based on Gaia data release 2
(DR2), PS1, SDSS, and 2MASS astrometry. GPS1+ totally provides proper
motions for ∼400 million sources with a characteristic systematic
error of less than 0.1mas/yr. This catalog is divided into two
subsamples, i.e., the primary and secondary parts. The primary
∼264 million sources have either or both Gaia and SDSS astrometry,
with a typical precision of 2.0-5.0mas/yr. In this part, ∼160 million
sources have Gaia proper motions, and we provide another new proper
motion for each of them by building a Bayesian model. Relative to
Gaia's values, the precision is improved by ∼0.1dex on average; ∼50
million sources are the objects whose proper motions are missing in
Gaia DR2, and we provide their proper motions with a precision of
∼4.5mas/yr. The remaining ∼54 million faint sources are beyond Gaia
detecting capability, and we provide their proper motions for the
first time with a precision of 7.0mas/yr. However, the secondary
∼136 million sources only have PS1 astrometry, where the average
precision is worse than 15.0mas/yr. The large uncertainty probably
limits it to qualitative applications. All the proper motions have
been validated using QSOs and the existing Gaia proper motions. The
catalog will be available via the TAP Service in the German
Astrophysical Virtual Observatory.
Description:
We still use the four basic imaging surveys, i.e., Gaia, PS1 (II/349),
SDSS, and 2MASS, to build the GPS1+ catalog. Unlike GPS1 (I/343),
GPS1+ will be based on the Gaia DR2 (I/345), but the other three
astrometric data sets remain the same as those used in GPS1, i.e., the
same data version and treatment.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gps1_p.sam 311 1000 The extended Gaia-PS1-SDSS (GPS1+) proper motion
catalog, sample output
(on a total of 390,405,023 sources)
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/315 : UCAC3 Catalogue (Zacharias+ 2009)
I/317 : The PPMXL Catalog (Roeser+ 2010)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
I/331 : Absolute Proper motions Outside the Plane (APOP) (Qi+, 2015)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
I/339 : Hot Stuff for One Year (HSOY) (Altmann+, 2017)
I/343 : Gaia-PS1-SDSS (GPS1) proper motion catalog (Tian+, 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/A+A/561/A142 : Galactic extinction from SDSS BHB stars (Tian+, 2014)
J/ApJ/817/73 : QSOs & RR Lyrae in Pan-STARRS1 3π (Hernitschek+ 2016)
J/AJ/154/256 : VLM stars and BDs in Upper Sco using Gaia DR1 (Cook+, 2017)
J/AJ/156/76 : New young stars & brown dwarfs in Upper Sco (Luhman+, 2018)
J/ApJ/870/9 : Ages & masses for GPS1 WD-MS bin. systems (Fouesneau+, 2019)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
J/ApJS/246/4 : Ultrawide binary stars from Gaia DR2 (Tian+, 2020)
http://nadc.china-vo.org/data/data/gps1p : GPS1+ on China VO
Byte-by-byte Description of file: gps1_p.sam
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Bytes Format Units Label Explanations
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1- 15 F15.11 deg RAdeg Average right ascension (ICRS) at Ep=J2010
from PS1 PV3 (ra)
17- 31 F15.11 deg DEdeg [-30.1/90] Average declination (ICRS)
at Ep=J2010 from PS1 PV3 (dec)
33- 52 I20 --- objID The unique but internal object_id in PS1
54- 62 F9.6 mag rmag [19/22.5] r-band magnitude from PS1 (mr)
64- 76 F13.3 mas/yr pmRA [-4.61E7/4.23E7] Proper motion with
robust fit in αcosδ (muXI)
78- 90 F13.3 mas/yr e_pmRA [0.1/]? Error of the proper motion with
robust fit in αcosδ (muErrXI)
92- 104 F13.3 mas/yr pmxRA [-4.61E7/4.23E7] Proper motion with
cross-validated fit in αcosδ
(muXxi)
106- 118 F13.3 mas/yr e_pmxRA [0.1/]? Error of the proper motion with
cross-validated fit in αcosδ
(muErrXxi)
120- 131 E12.6 --- Chi2RA [1.4E-18/108335]? Chi square from the robust
proper motion fit in αcosδ
(chi2XI)
133- 142 F10.3 mas/yr pmMRA [-24893/23564]?=9999 Proper motion with MCMC
sampling fit in αcosδ (muXI_mcmc)
144- 152 F9.3 mas/yr e_pmMRA [0/29117]?=9999 Error of the proper motion
with MCMC sampling fit in αcosδ
(muErrXI_mcmc)
154- 165 E12.6 --- Chi2MRA [1.2E-5/7.1E12]?=9999 Chi square from MCMC
sampling fit in αcosδ
(chi2XI_mcmc)
167- 174 F8.3 mas/yr pmGRA [-679/]?=9999 Proper motion from Gaia DR2
in αcosδ (gpmra)
176- 183 F8.3 mas/yr e_pmGRA [-366/]?=9999 Error of the proper motion from
Gaia DR2 in αcosδ (gpmraErr)
185- 197 F13.3 mas/yr pmDE [-3.4E7/3.1E7] Proper motion with robust fit
in δ (muETA)
199- 210 F12.3 mas/yr e_pmDE [0.2/1.3E7]? Error of the proper motion with
robust fit in δ (muErrETA)
212- 224 F13.3 mas/yr pmxDE [-3.4E7/3.1E7] Proper motion with
cross-validated fit in δ (muXeta)
226- 237 F12.3 mas/yr e_pmxDE [0.2/1.3E7]? Error of the proper motion with
cross-validated fit in δ (muErrXeta)
239- 250 E12.6 --- Chi2DE [2.2E-18/77236] Chi square from the robust
proper motion fit in δ (chi2ETA)
252- 261 F10.3 mas/yr pmMDE [-24075/24165]?=9999 Proper motion with MCMC
sampling fit in δ (muETA_mcmc)
263- 271 F9.3 mas/yr e_pmMDE [0.02/29101]?=9999 Error of the proper motion
with MCMC sampling fit in δ
(muErrETA_mcmc)
273- 284 E12.6 --- Chi2MDE [3.4E-4/8E12]?=9999 Chi square from MCMC
sampling fit in δ (chi2ETA_mcmc)
286- 293 F8.3 mas/yr pmGDE [-612/]?=9999 Proper motion from Gaia DR2 in
δ (gpmdec)
295- 302 F8.3 mas/yr e_pmGDE [-6.1/]?=9999 Error of the proper motion from
Gaia DR2 in δ (gpmdecErr)
304- 305 I2 --- Nobs0 [3/15] The number of SeasonAVG observations
used in the proper motion fit
307- 308 I2 --- Nobs [3/16] The number of all the observations
used in the robust proper motion fit
310- 311 I2 --- Flag [0/35] An integer number used to flag the
different data combination in the proper
motion fit (1)
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Note (1): In order to label the different survey combinations for proper motion
fit, we assign PS1, 2MASS, SDSS, and Gaia with different integer
identifiers, i.e., 0, 5, 10, and 20, respectively. Flag is the sum of
identifiers of surveys combined.
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Acknowledgment:
Bertrand Goldman [goldman _ mpia.de] and Haijun Tian [hjtian _ lamost.org]
(End) G. Monari, F.-X. Pineau, E. Perret [CDS] 28-Jan-2021