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J/ApJS/96/605             Far UV Stellar Photometry     (Schmidt+ 1995)
Far-Ultraviolet Stellar Photometry: Fields in Sagittarius and Scorpius
     Schmidt E.G., Carruthers G.R.
    <Astrophys. J. Suppl. Ser. 96, 605 (1995)>
    =1995ApJS...96..605S
ADC_Keywords: Photometry, ultraviolet ; Stars, early-type

Keywords: stars: early-type -- surveys -- techniques: photometric --
          ultraviolet: stars

Abstract:
    Far-ultraviolet photometry for 741 objects in a field in Sagittarius
    centered near M8 and 541 objects in a field centered near zeta Scorpii
    is presented. These data were extracted from electrographic images
    obtained with two cameras during a shuttle flight in 1991 April/May.
    The cameras provided band passes with lambda_eff = 1375 A and
    lambda_eff = 1781 A. Synthetic colors show that these bands are
    sensitive to effective temperature for hot stars. Our measurements
    were placed on a quantitative far-ultraviolet magnitude scale by
    convolving the spectra of stars observed by IUE with our cameras'
    spectral response functions. Fifty-eight percent of the ultraviolet
    objects were identified with visible stars using the SIMBAD database
    while another 40% of the objects are blends of early type stars too
    close together to separate with our resolution. Our photometry is
    compared with that from the TD-1, OAO 2, and ANS satellites and the
    S201 (Apollo 16) far-ultraviolet camera and found to agree at the
    level of a few tenths of a magnitude. Unlike previous studies, almost
    half of the identified visual counterparts to the ultraviolet objects
    are early B stars. A plot of distance modulus against ultraviolet
    color excess reveals a significant population of stars with strong
    ultraviolet excesses.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table4            74      740  *Ultraviolet objects in the M8 field
table5            74      541  *Ultraviolet objects in the zeta Sco field

Note on table4, table5: in the printed paper,
     the right ascensions are wrong by 10 hours.
     The error was corrected in the electronic tables.


Byte-by-byte Description of file: table4 table5

   Bytes Format  Units   Label    Explanations

   1-  4  I4     ---     Star     Star number
   6-  7  I2     h       RAh     *Right ascension (1950)
   9- 10  I2     min     RAm      R.A.
  12- 13  I2     s       RAs      R.A.
      15  A1     ---     DE-      Declination sign
  16- 17  I2     deg     DEd      Declination (1950)
  19- 20  I2     arcmin  DEm      Dec.
  22- 26  F5.2   mag     m1375    []? Magnitude at 1375 Angstroems
  28- 33  F6.2   mag     m1781    []? Magnitude at 1781 Angstroems
  36- 47  A12    ---     ID       Identification
  50- 54  F5.2   mag     Mag      ? V or ptg. magnitude from SIMBAD
      55  A1     ---     n_Mag    [P] 'P' when Mag is photographic
  57- 74  A18    ---     Sp       Spectral type

Note on RAh: the printed values are all missing the '1'
        (e.g. ' 7' instead of '17')


Origin: AAS CD-ROM series, Volume 4, 1995           Lee Brotzman [ADS] 08-May-95


Historical Notes:
  * 12-Jul-1995:
    The original tables 4 and 5 where modified at CDS to place the
    magnitude flag 'P' in a dedicated column.
  * 05-Nov-1996:
    The RAh values were discovered to be wrong by 10 hours at CDS;
    all RAh values were then changed.
(End)                                                         [CDS]  12-Jul-1995