The Optical Gravitational Lensing Experiment: catalogue of stellar proper motions in the OGLE-II Galactic bulge fields
Abstract
We present a proper-motion (μ) catalogue of 5 080 236 stars in 49 Optical Gravitational Lensing Experiment II (OGLE-II) Galactic bulge (GB) fields, covering a range of -11° < l < 11° and -6° < b < 3°, the total area close to 11 deg2. The proper-motion measurements are based on 138-555 I-band images taken during four observing seasons: 1997-2000. The catalogue stars are in the magnitude range 11 < I < 18 mag. In particular, the catalogue includes red clump giants and red giants in the GB, and main-sequence stars in the Galactic disc. The proper motions up to μ= 500 mas yr-1 were measured with a mean accuracy of 0.8-3.5 mas yr-1, depending on the brightness of a star. This catalogue may be useful for studying the kinematics of stars in the GB and the Galactic disc.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 2004
- DOI:
- 10.1111/j.1365-2966.2004.07457.x
- arXiv:
- arXiv:astro-ph/0305315
- Bibcode:
- 2004MNRAS.348.1439S
- Keywords:
-
- astrometry;
- Galaxy: bulge;
- Galaxy: centre;
- Galaxy: kinematics and dynamics;
- Galaxy: structure;
- Astrophysics
- E-Print:
- 13 pages, 16 figures, MNRAS in press