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J/ApJ/562/368       UV photometry in NGC 2808                    (Brown+, 2001)
Flash mixing on the white dwarf cooling curve: understanding hot horizontal
branch anomalies in NGC 2808.
    Brown T.M., Sweigart A.V., Lanz T., Landsman W.B., Hubeny I.
   <Astrophys. J. 562, 368 (2001)>
   =2001ApJ...562..368B
ADC_Keywords: Clusters, globular ; Photometry, ultraviolet

Keywords: globular clusters: individual (NGC 2808) - stars: atmospheres -
          stars: evolution - stars: horizontal-branch - ultraviolet: stars

Description:
    We examine new observations of NGC 2808, taken with the far-UV and
    near-UV cameras on the Space Telescope Imaging Spectrograph (STIS) on
    board the Hubble Space Telescope (HST).
    Images were obtained in the far-UV crystal quartz (FUV/F25QTZ; pivot
    wavelength 1600Å), near-UV 2700Å continuum (NUV/F25CN270), and
    clear CCD (CCD/50CCD; pivot wavelength 5850Å) modes, employing a
    cross-shaped dither pattern.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        48      295   Photometric catalog


See also:
   J/A+AS/84/59 : BV photometry of NGC 2808 (Ferraro+, 1990)


Table 1: UV Imaging
--------------------------------------------------------------------------------
 STIS Band     Exposure     Observation Dates (2000)    Coverage
                 (s)                                   (arcmin2)
--------------------------------------------------------------------------------
 FUV/F25QTZ     8916        Jan 18, Feb 16               1744
 NUV/F25CN270   8906        Jan 19, Feb 20               1752

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

   Bytes Format Units   Label     Explanations

       1  I1    h       RAh       Right Ascension (J2000) (1)
   3-  4  I2    min     RAm       Right Ascension (J2000) (1)
   6- 12  F7.4  s       RAs       Right Ascension (J2000) (1)
      14  A1    ---     DE-       Declination (J2000) (1)
  15- 16  I2    deg     DEd       Declination (J2000) (1)
  18- 19  I2    arcmin  DEm       Declination (J2000) (1)
  21- 26  F6.3  arcsec  DEs       Declination (J2000) (1)
  28- 32  F5.2  mag     FUVmag    The Far-UV STMAG magnitude (1600Å)
  34- 37  F4.2  mag     e_FUVmag  The error in FUVmag
  39- 43  F5.2  mag     NUVmag    The Near-UV STMAG magnitude (2700Å)
  45- 48  F4.2  mag     e_NUVmag  The error in NUVmag

Note (1): The relative astrometry is very accurate (tenths of a 0.025arcsec
    STIS pixel), but the absolute astrometry is subject to a 1-2 arcsec
    uncertainty (associated with the position of the guide stars). Objects
    identified as [BSL2001] JHHMMSS.ssss+DDMMSS.sss in Simbad


History:
    From electronic version of the journal
(End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    29-Jan-2002