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Title:
The First MOTESS-GNAT Variable-Star Survey
Authors:
Kraus, Adam L.; Craine, Eric R.; Giampapa, Mark S.; Scharlach, Werner W. G.; Tucker, Roy A.
Affiliation:
AA(Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA ), AB(Global Network of Astronomical Telescopes ), AC(National Solar Observatory; and National Optical Astronomy ObservatoryThe National Solar Observatory and National Optical Astronomical Observatory are each operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. ), AD(Global Network of Astronomical Telescopes ), AE(Goodricke-Pigott Observatory)
Publication:
The Astronomical Journal, Volume 134, Issue 4, pp. 1488-1502 (2007). (AJ Homepage)
Publication Date:
10/2007
Origin:
IOP
DOI:
10.1086/521148
Bibliographic Code:
2007AJ....134.1488K

Abstract

We present the results of the first MOTESS-GNAT variable-star survey, a deep, wide-field variability survey conducted over 2 yr with a total sky coverage of 300 deg2. In this survey, we identified 26,042 variable-star candidates with magnitudes R = 13-19, including 5271 that are periodic at the 99% confidence level. We recovered 59 out of 68 members of the General Catalogue of Variable Stars (GCVS) that are in this brightness range. We discuss the implications for completeness and accuracy for both this survey and the GCVS; the implied completeness for distinctly classifiable variable stars in our survey is ~85%-90%. We also discuss some of the caveats of our survey results. We conclude that this instrument design is ideal for an inexpensive, longitudinally distributed telescope network that could be used to study faint or rare transient phenomena in a previously unexplored regime of parameter space.
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