The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog
Tian,Hai-Jun1,2; Xu,Yang3; Liu,Chao3; Rix,Hans-Walter2; Sesar,Branimir2; Goldman,Bertrand2,4
Source PublicationThe Astrophysical Journal Supplement Series
AbstractAbstract 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 mag. In this study, we present GPS1+, the extension GPS1 catalog down to mag, 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 0.1 mas yr?1. 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 2.0–5.0 mas yr?1. 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 ~0.1 dex 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 ~4.5 mas yr?1. 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 7.0 mas yr?1. However, the secondary ~136 million sources only have PS1 astrometry, where the average precision is worse than 15.0 mas yr?1. 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.
KeywordGalaxy kinematics Astrometry Catalogs Galaxy dynamics Proper motions
WOS IDIOP:0067-0049-248-2-ab8d27
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Center for Astronomy and Space Sciences, China Three Gorges University, Yichang 443002, People’s Republic of China;
2.Max Planck Institute for Astronomy, K?nigstuhl 17, D-69117 Heidelberg, Germany
3.Key Lab for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
4.Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l’Université, F-67000 Strasbourg, France
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GB/T 7714
Tian,Hai-Jun,Xu,Yang,Liu,Chao,等. The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog[J]. The Astrophysical Journal Supplement Series,2020,248(2).
APA Tian,Hai-Jun,Xu,Yang,Liu,Chao,Rix,Hans-Walter,Sesar,Branimir,&Goldman,Bertrand.(2020).The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog.The Astrophysical Journal Supplement Series,248(2).
MLA Tian,Hai-Jun,et al."The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog".The Astrophysical Journal Supplement Series 248.2(2020).
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