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arXiv:astro-ph/0504489 (astro-ph)
[Submitted on 21 Apr 2005]

Title:The Galex Ultraviolet Variability (GUVV) Catalog

Authors:Barry Y. Welsh, Jonathan M. Wheatley, Kenneth Heafield, Mark Seibert, Stanley E. Browne, Samir Salim, R. Michael Rich, Tom A. Barlow, Luciana Bianchi, Yong-Ik Byun, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young-Wook Lee, Barry F. Madore, Roger F. Malina, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, Susan G. Neff, David Schiminovich, Oswald H. W. Siegmund, Todd Small, Alex S. Szalay, Ted K. Wyder
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Abstract: We present Version 1.0 of the NASA Galaxy Evolution Explorer (GALEX) ultraviolet variability catalog (GUVV) that contains information on 84 time-variable and transient sources gained with simultaneous near and far ultraviolet photometric observations. These time-variable sources were serendipitously revealed in the various 1.2 degree star fields currently being surveyed by the GALEX satellite in two ultraviolet bands (NUV 1750-2750A, FUV 1350-1750A) with limiting AB magnitudes of 23-25. The largest-amplitude variable objects presently detected by GALEX are M-dwarf flare stars, which can brighten by 5-10 mag in both the NUV and FUV bands during short duration (< 500s) outbursts. Other types of large-amplitude ultraviolet variable objects include ab-type RR Lyrae stars, which can vary periodically by 2-5mag in the GALEX FUV band. This first GUVV catalog lists galactic positions and possible source identifications in order to provide the astronomical community with a list of time-variable objects that can now be repeatedly observed at other wavelengths. We expect the total number of time-variable source detections to increase as the GALEX mission progresses, such that later version numbers of the GUVV catalog will contain substantially more variable sources.
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0504489
  (or arXiv:astro-ph/0504489v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0504489
Journal reference: Astron.J.130:825-831,2005
Related DOI: https://doi.org/10.1086/431222

Submission history

From: Jonathan Wheatley [view email]
[v1] Thu, 21 Apr 2005 21:57:27 UTC (34 KB)
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