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TheGALEXUltraviolet Variability Catalog
Author(s) -
Barry Y. Welsh,
Jonathan Wheatley,
Kenneth Heafield,
Mark Seibert,
Stanley E. Browne,
Samir Salim,
R. Michael Rich,
Tom A. Barlow,
L. Bianchi,
Yong-Ik Byun,
J. Donas,
Karl Förster,
Peter G. Friedman,
Timothy M. Heckman,
Patrick N. Jelinsky,
YoungWook Lee,
Barry F. Madore,
Roger F. Malina,
D. Christopher Martin,
Bruno Milliard,
Patrick Morrissey,
S. G. Neff,
David Schiminovich,
Oswald H. W. Siegmund,
Todd Small,
Alexander S. Szalay,
Ted K. Wyder
Publication year - 2005
Publication title -
the astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.61
H-Index - 271
eISSN - 1538-3881
pISSN - 0004-6256
DOI - 10.1086/431222
Subject(s) - physics , astrophysics , ultraviolet , galaxy , variable star , stars , rr lyrae variable , astronomy , variable (mathematics) , optics , mathematical analysis , mathematics , globular cluster
We present Version 1.0 of the NASA Galaxy Evolution Explorer (GALEX)ultraviolet variability catalog (GUVV) that contains information on 84time-variable and transient sources gained with simultaneous near and farultraviolet photometric observations. These time-variable sources wereserendipitously revealed in the various 1.2 degree star fields currently beingsurveyed by the GALEX satellite in two ultraviolet bands (NUV 1750-2750A, FUV1350-1750A) with limiting AB magnitudes of 23-25. The largest-amplitudevariable objects presently detected by GALEX are M-dwarf flare stars, which canbrighten by 5-10 mag in both the NUV and FUV bands during short duration (<500s) outbursts. Other types of large-amplitude ultraviolet variable objectsinclude ab-type RR Lyrae stars, which can vary periodically by 2-5mag in theGALEX FUV band. This first GUVV catalog lists galactic positions and possiblesource identifications in order to provide the astronomical community with alist of time-variable objects that can now be repeatedly observed at otherwavelengths. We expect the total number of time-variable source detections toincrease as the GALEX mission progresses, such that later version numbers ofthe GUVV catalog will contain substantially more variable sources

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