III/164 Catalog of Eq.Widths of Interstellar 217nm Band (Friedemann 1992)
A Master Catalogue of Equivalent Widths of the Interstellar 217nm band
Friedemann C.
=1992BICDS..40...31F 1992BICDS..40...31F
ADC_Keywords: Equivalent widths; Interstellar medium; Spectra, ultraviolet;
Photometry, ultraviolet
Description:
(from CDS Inf. Bull. 40, 31)
The main task of the catalogue consists in a comprehensive collection
of equivalent widths of the 217nm band derived from both
spectrophotometric and filterphotometric measurements obtained with
TD-1, OAO-2 and ANS satellites. These data concern reddened O, B stars
with color excesses E(B-V) ≥ 0.02 mag.
The extinction curve is approximated by the empirical formula
introduced by Guertler et al. (1982AN....303..105G 1982AN....303..105G)
e(λ) = A(i/λ - 1/λo)n + B + C κ(λ)
The relative errors amount to about δA/A = ± 0.10,
δB/B = ± 0.02 and δC/C = ± 0.03.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 64 2861 Catalog Data
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
14- 18 F5.2 mag E(B-V) ? E(B-V) Color excess
20- 23 I4 0.1nm lam_c ? Central wavelength of the 2200 band (Å)
25- 31 F7.4 --- A A parameter (see "Description" section above)
33- 39 F7.4 --- B B parameter (see "Description" section above)
41- 47 F7.4 --- C C parameter (see "Description" section above)
49- 52 I4 0.1nm W *Equivalent width (Å)
54- 56 I3 --- N Number of observations
58- 64 A7 --- rem *Remarks
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Note on W:
A negative value indicates that a flat minimum instead of a maximum
has been found in the extinction curve in the wavelength region of the
2200Å band. In these cases W was computed with lam_c = 2182Å.
Note on rem: the following symbols are used:
O: Filterphotometry from OAO-2
J: Spectral flux data from LSR of IUE
C: The wavelength of the centre of the absorption band has been fixed
to the average value lam_c = 2182Å because the searching procedure
for lam_c had led to a value lam_c outside the presumed interval
from 2182 - 2228Å. The parameters A B C and W were computed with
the average value lam_c = 2182Å.
D: within one arcminute of the pointing position at least two stars
are present (Wesselius et al. 1982A&AS...49..427W 1982A&AS...49..427W)
V: Ultraviolet ANS data (Wesselius et al., 1982A&AS...49..427W 1982A&AS...49..427W)
indicate variability
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History:
* 26-Feb-1992: Original Version
* 04-Jun-1996: Catalog standardized (Julie Anne Watko, SSDOO/ADC)
* 15-Mar-2005: Name of the stars standardized (added "HD" or "BD")
References:
Dorschner J., Friedemann C., Gurtler J. and Schielicke R. 1984, Bull. Inf.
CDS 27, 137
Friedemann C. 1987, Bull. Inf. CDS 32, 77
Friedemann C. 1988, Bull. Inf. CDS 35, 157
Guertler J., Schielicke R., Dorschner J., Friedemann C: 1982,
1982AN....303..105G 1982AN....303..105G
Wesselius P.R., van Duinen R.J., de Jonge A.R.W., Aalders J.W.G.,
Luinge W., Wildeman K.J.: 1982A&AS...49..427W 1982A&AS...49..427W
(End) Julie Anne Watko [SSDOO/ADC], Francois Ochsenbein [CDS] 15-Mar-2005