
This directory contains flux files for HST spectrophotometric
standards. The STSDAS tables ( for 27 stars ) in the CALSPEC
directory from STScI have been processed to give .TAB files
compatible with existing spectrophotometric standard star files
already used by FIGARO. Those .TAB files with a root name ending
in an A have wavelength and ABMAG listed, whilst those without an
A at the end of the rootname ( except ETAUMA and GAMMAUMA ) have
wavelength and milliJy listed, following the previous convention.

The basic reference for HST standards is Turnshek et al., Astron.
J., 99, 1243, 1990. See also Bohlin, STScI Newsletter, Vol. 9,
No. 2, September, 1992 for details of the processing. This 
directory contains both Category 1 and Category 2 HST standards
( see Bohlin, 1992 for listing ).

For details of the processing of these files please refer to J. R.
Walsh at ST-ECF ( JWALSH@ESO.ORG or ESO::JWALSH ).

Data last updated August 1992.

-----------------------------------------------------------------------------

The HST spectrophotometric standards cover the approximate wavelength range
800 to 12,000 Angstrom.  The following table gives summary details for
the standard stars.  It was assembled from SIMBAD (in July 2002) and
consequently the data are somewhat heterogenous.  Similar data are available
in Table 1 of Turnshek et al. (1990).  The Turnshek et al. and SIMBAD V
magnitudes usually agree to within a few tenths of a magnitude, but there
are some significant differences in the spectral types.  Turnshek et al.
give the following position for BPM 16274: 0 50 03.18, -52 08 17.4, which
may be preferable to the unusually imprecise SIMBAD position.  An asterisk
(`*') in the final column of the table indicates that the star is also
included in the companion set of Oke spectrophotometric standards.

  Star            R.A.           Dec.          V     Sp.    Oke
  Name           (2000)         (2000)               Type 
  AG+81 266   09 21 19.1801  +81 43 27.642   12.10   B2
  Alpha Lyr   18 36 56.3364  +38 47 01.291    0.03   A0V
  BD+28 4211  21 51 11.0222  +28 51 50.364   10.54   Op      *
  BD+33 2642  15 51 59.8855  +32 56 54.324   10.81   B2IVp   *
  BD+75 325   08 10 49.4903  +74 57 57.929    9.50   O5pvar  *
  BPM 16274   00 50.1        -52 09          14.16   DA...
  Eta UMA     13 47 32.4377  +49 18 47.754    1.852  B3V
  Feige 110   23 19 58.3977  -05 09 56.207   11.4    DA:     *
  Feige 34    10 39 36.7400  +43 06 09.252   11.0    DA:     *
  G 191-B2B   05 05 30.6119  +52 49 51.945   11.79   DAw...  *
  G 93-48     21 52 25.3835  +02 23 19.556   12.73   DA
  Gamma UMa   11 53 49.8475  +53 41 41.136    2.427  A0V
  GD 108      10 00 47       -07 33.5        13.56   B       *
  GD 50       03 48 50.10    -00 58 28.5     13.98   DAw...
  GRW+70 5824 13 38 50.4743  +70 17 07.619   12.80   DA:     *
  HD 49798    06 48 04.6995  -44 18 58.431    8.27   sdO6p
  HD 60753    07 33 27.3188  -50 35 03.319    6.682  B2III
  HD 93521    10 48 23.5112  +37 34 13.090    7.06   O9Vp    *
  HZ 21       12 13 56.27    +32 56 31.4     14.22   DA:     *
  HZ 2        04 12 43.49    +11 51 50.6     13.86   DA:
  HZ 44       13 23 35.258   +36 07 59.51    11.3    B2      *
  HZ 4        03 55 21.77    +09 47 18.4     14.47   DA:     *
  LB 227      04 09 28.50    +17 07 55.2     15.35   DA
  LDS 749B    21 32 16.1     +00 15 15       14.58   DB
  Mu Col      05 45 59.8950  -32 18 23.166    5.148  O9.5V
  NGC 7293    22 29 48.4     -20 49 26       13.54           *
  Zeta Cas    00 36 58.2846  +53 53 48.874    3.666  B2IV


These files were previously available on Starlink's VAX/VMS service STADAT.
They were recovered and converted to Unix format in July 2002.  If you
encounter any problems using these files then please send an e-mail message
to username:

  figaro@star.rl.ac.uk

Clive Davenhall,
2/8/02.
