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III/122     Interstellar 217-nm Band: Equivalent Widths 3 (Friedemann+ 1987)
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The Interstellar 217-nm Band: A Third Catalogue of Equivalent Widths
    Friedemann C., Roder U.K.
    <Astron. Nachr. 308, 41 (1987)>
    =1987AN....308...41F
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ADC_Keywords: Equivalent widths; Interstellar medium

Abstract:
   Using the data obtained with the ultraviolet photometer in the Astronomical 
   Netherlands Satellite, the equivalent widths of the interstellar 217 nm band
   as well as other parameters characterizing the behavior of the continuous 
   interstellar extinction in the wavelength region of the band have been 
   derived for 790 O, B stars with color excesses E(B-V) >= 0.4 mag.

File Summary:
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 FileName     Lrecl  Records   Explanations
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ReadMe           80        .   This file
data.dat         53      790   Equivalent width data
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Byte-by-byte Description of file: data.dat
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   Bytes Format  Units   Label    Explanations
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   1-  9  A9     ---     ID      *HD or BD Identification
  11- 14  F4.2   mag     E(B-V)   E(B-V) Color excess
  16- 21  F6.3   ---     alpha   *{alpha} parameter
  23- 28  F6.3   ---     beta    *{beta}  parameter
  30- 35  F6.3   ---     gamma   *{gamma} parameter
  37- 40  I4     0.1nm   W        Equivalent width in Angstroms
  42- 44  I3     10-3mag S2200   *Standard deviation (Wesselius et al. 1982)
  46- 47  I2     ---     N        Number of separate observations (Ibid.)
  49- 53  A5     ---     rem     *Remarks
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Note on ID:
   HD is right justified to byte 6.
   BD zone appears in bytes 1-3. BD number is right justified to byte 9.

Note on alpha beta gamma:
   Parameters as defined in Gurtler et al. (1982).
   Actual values are in Friedemann and Roder (1987) derived from ANS data 
     compiled by Wesselius et al. (1982).
   Each is given in units of microns to the power of 5/3.

Note on S2200:
   Standard deviation in 0.001mag in the 2200 A band according to Wesselius et 
     al. (1982)

Note on rem:
    3  =  common star with an entry in the catalog compiled by Dorschner et 
            al. (1984)
    4  =  at least two stars are present within one arcminute of the pointing 
            position
    5  =  ultraviolet results indicate variability
   50  =  suspected variable
    6  =  equivalent width W deviates two to three times the standard deviation
            of the mean relation W ~ E(B-V)
   70  =  possibly a deviating extinction law
    8  =  lying in a cluster that probably affects the ultraviolet data
    9  =  equivalent width W deviates at least three times the standard 
            deviation from the mean relation W ~ E(B-V)

Remarks:
   supersedes III/95

References:
   Friedemann C. 1987, Bull. Inf. CDS No. 32.
   Friedemann C. and Roder U.K. 1987, Astron. Nachr. 308, 41.
   Gurtler J., Schielicke R., Dorschner J. and Friedemann C. 1982, Astron. 
     Nachr., 303, 105.
   Wesselius P.R., van Duinen R.J., de Jonge A.R.W., Aalders J.W.G, Luinge W.,
     Wildeman K.J. 1982, Astron. Astrophys. Suppl. Ser., 49, 427.
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(End)                                  Julie Anne Watko [SSDOO/ADC]  15-AUG-1996