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J/AJ/130/825       GALEX ultraviolet variability catalog          (Welsh+, 2005)
The GALEX ultraviolet variability catalog.
    Welsh B.Y., Wheatley J.M., Heafield K., Seibert M., Browne S.E., Salim S.,
    Rich R.M., Barlow T.A., Bianchi L., Byun Y.-I., Donas J., Forster K.,
    Friedman P.G., Heckman T.M., Jelinsky P.N., Lee Y.-W., Madore B.F.,
    Malina R.F., Martin D.C., Milliard B., Morrissey P., Neff S.G.,
    Schiminovich D., Siegmund O.H.W., Small T., Szalay A.S., Wyder T.K.
   <Astron. J., 130, 825-831 (2005)>
   =2005AJ....130..825W
ADC_Keywords: Stars, variable ; Ultraviolet ; Photometry

Keywords: stars: flare - stars: variables: other - ultraviolet: stars


Abstract:
    We present version 1.0 of the NASA Galaxy Evolution Explorer (GALEX)
    ultraviolet variability (GUVV) catalog, which contains information on
    84 time-variable and transient sources gained with simultaneous
    near-ultraviolet (NUV) and far-ultraviolet (FUV) photometric
    observations. These time-variable sources were serendipitously
    revealed in the various 1.2° diameter star fields currently being
    surveyed by the GALEX satellite in two ultraviolet bands (NUV
    1750-2750Å, FUV 1350-1750Å) with limiting AB magnitudes of
    23-25. The largest amplitude variable objects currently detected by
    GALEX are M dwarf flare stars, which can brighten by 5-10mag 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.

Description:
    We have used the GALEX FUV- and NUV-band photometric imaging data
    recorded during the period 2003 June to 2004 August, which reside in
    the Multi-Mission Archive at the Space Telescope Science Institute
    (MAST).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       131       44   GALEX Ultraviolet Variability catalog, V1.0.


See also:
  I/284  : The USNO-B1.0 Catalog (Monet+ 2003)
  II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 18  A18   ---     GUVV      GALEX Ultraviolet Variability catalog ID
                                   (JHHMMSS.s+DDMMSS.s)
      20  A1    ---     Var       [VT] Variable or Transient variability type
  22- 33  A12   ---     USNO      The USNO-B1.0 all-sky catalog (Cat. I/284)
                                   designation
  35- 58  A24   ---     OName     Possible identification
  60- 77  A18   ---     Type      Most likely source type (2)
  79- 81  A3    ---     Survey    GALEX survey mode of the sky field in which
                                   the object was discovered (3)
  83- 85  I3    ---     NUVobs    Number of NUV (175-275nm) observations
  87- 88  I2    ---     NUVdet    Number of NUV (175-275nm) detections
  90- 94  F5.2  mag     NUVmax    Maximum near-UV (175-275nm) magnitude
  96- 99  F4.2  mag     NUVdm     ? The near-UV (175-275nm) amplitude
 101-103  I3    ---     FUVobs    Number of FUV (135-175nm) observations
 105-106  I2    ---     FUVdet    Number of FUV (135-175nm) detections
 108-112  F5.2  mag     FUVmax    ? Maximum far-UV (135-175nm) magnitude
 114-117  F4.2  mag     FUVdm     ? The far-UV (135-175nm) amplitude
 119-123  F5.2  mag     gmag      ? SDSS DR3 (Cat. II/259) g band magnitude
     124  A1    ---     f_gmag    [*] Indicates an uncertain SDSS magnitude
 126-130  F5.2  mag     rmag      ? SDSS DR3 (Cat. II/259) r band magnitude
     131  A1    ---     f_rmag    [*] Indicates an uncertain SDSS magnitude

Note (2): PV indicates a periodic variable.

Note (3): The GALEX survey modes are defined as follows:
    AIS = All-sky Imaging Survey
    MIS = Medium Imaging Survey
    DIS = Deep Imaging Survey
    NGS = Nearby Galaxy Survey


History:
    * 08-Feb-2006: From electronic version of the journal
    * 01-Dec-2008: Unique entries in table2 (duplicated lines were removed)
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    26-Oct-2005