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29 March 2024
 
  » arxiv » astro-ph/0504489

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The Galex Ultraviolet Variability (GUVV) Catalog
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 ;
Date 21 Apr 2005
Subject astro-ph
AbstractWe 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.
Source arXiv, astro-ph/0504489
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