Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aj....122.3482w&link_type=abstract
The Astronomical Journal, Volume 122, Issue 6, pp. 3482-3484.
Astronomy and Astrophysics
Astronomy
10
Stars: Binaries: General, Stars: Binaries: Visual, Catalogs
Scientific paper
The Photometric Magnitude Difference Catalog, maintained at the US Naval Observatory, is a collection of magnitude-difference measures for double stars and serves as a repository for double star observations where no astrometry is given. At the present time, it consists of 19,594 measures of 10,475 systems with a mean Δm of 1.90. Because of the nonuniformity of filters and the possible variability of one or more components in a system, no ``WDS-like'' summary line is provided. Rather, all the data are presented and their interpretation is left as an ``exercise for the reader.'' This catalog is one of four USNO double star catalogs to be included on a new CD-ROM. A brief summary and statistical analysis of the contents of the catalog are presented.
Mason Brian D.
Worley Charles E.
Wycoff Gary L.
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