New variables in the Sloan Digital Sky Survey calibration fields

Details New variables in the Sloan Digital Sky Survey calibration fields New variables in the Sloan Digital Sky Survey calibration fields

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aj....115..296h&link_type=abstract

Astronomical Journal, vol. 115, p. 296

Astronomy and Astrophysics

Astronomy

32

Variable Stars, Astrometry, Charge Coupled Devices, Cepheid Variables, Astronomical Photometry, Histograms, Interstellar Extinction

Scientific paper

The U.S. Naval Observatory 0.2 m Flagstaff Astrometric Scanning Transit Telescope was used to obtain astrometric information in 16 equatorial fields in support of the Sloan Digital Sky Survey. Each field is approximately 7.6 3.2 deg in size and was scanned about 10 times with overlapping CCD strip scans; star positions accurate to +/- 50 mas in each coordinate and magnitudes good to 0.011 mag were determined. As an ancillary project, this database was searched for new variables, and the results of that search are presented here. Approximately 1500 new variables have been discovered, and accurate coordinates for about 100 previously identified variables and suspected variables are given.

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