The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog
Abstract
URAT1 is an observational, astrometric catalog covering most of the δ ≥slant -15° area and a magnitude range of about R = 3-18.5. Accurate positions (typically 10-30 mas standard error) are given for over 228 million objects at a mean epoch around 2013.5. For the over 188 million objects matched with the Two Micron All Sky Survey (2MASS) point-source catalog proper motions (typically 5-7 mas yr-1 standard errors) are provided. These data are supplemented by 2MASS and AAVSO Photometric All-Sky Survey (APASS) photometry. Observations, reductions, and catalog construction are described, together with results from external data verifications. The catalog data are served by CDS, Starsbourg (I/329).
- Publication:
-
The Astronomical Journal
- Pub Date:
- October 2015
- DOI:
- 10.1088/0004-6256/150/4/101
- arXiv:
- arXiv:1508.04637
- Bibcode:
- 2015AJ....150..101Z
- Keywords:
-
- astrometry;
- catalogs;
- proper motions;
- Astrophysics - Instrumentation and Methods for Astrophysics
- E-Print:
- accepted by AJ, 21 pages, 17 figures, 5 tables