Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-12-10
2001, AJ, 121, 861
Astronomy and Astrophysics
Astrophysics
A copy of the paper with full-resolution embedded figures can be retrieved from ftp://cfa-ftp.harvard.edu/pub/kstanek/DIRECT
Scientific paper
10.1086/318772
The DIRECT project aims to determine direct distances to two important galaxies in the cosmological distance ladder -- M31 and M33 -- using detached eclipsing binaries (DEBs) and Cepheids. The search for these variables requires time-series photometry of large areas of the target galaxies and yields magnitudes and positions for tens of thousands of stellar objects, which may be of use to the astronomical community at large. During the first phase of the project, between September 1996 and October 1997, we were awarded 95 nights on the F. L. Whipple Observatory 1.2 m telescope and 36 nights on the Michigan-Dartmouth-MIT 1.3 m telescope to search for DEBs and Cepheids in the M31 and M33 galaxies. This paper, the first in our series of stellar catalogs, lists the positions, three-color photometry, and variability indices of 57,581 stars with 14.4 < V < 23.6 in the central part of M33. The catalog is available from our FTP site at ftp://cfa-ftp.harvard.edu/pub/kstanek/DIRECT/star_catalog/M33ABC/
Kaluzny Janusz
Krockenberger Martin
Macri Lucas M.
Sasselov Dimitar D.
Stanek Kris Z.
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