III/122 Interstellar 217-nm Band: Equivalent Widths (Friedemann+ 1987)
The Interstellar 217-nm Band: A Third Catalogue of Equivalent Widths
Friedemann C., Roder U.K.
<Astron. Nachr. 308, 41 (1987)>
=1987AN....308...41F 1987AN....308...41F
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 *α parameter
23- 28 F6.3 --- beta *β parameter
30- 35 F6.3 --- gamma *γ 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)
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Remarks:
Supersedes III/95
Superseded by III/164
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.
(End) Julie Anne Watko [SSDOO/ADC] 15-Aug-1996