The Extended Gaia–PS1–SDSS (GPS1+) Proper Motion Catalog
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 ~ 20 mag. In this release, the author presents GPS1+, the extension GPS1 catalog down to r ~ 22.5 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. The secondary ∼136 million sources only have PS1 astrometry, where the average precision is worse than 15.0 mas yr−1. All the proper motions have been validated using QSOs and the existing Gaia proper motions.
· Data access ·
GPS 1；catalog , proper motion , astrometry
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