III/195 Atlas of Optical Spectral Classification OB Stars (Walborn+ 1990)
Contempory Optical Spectral Classification of the OB Stars: A Digital Atlas
Walborn N.R., Fitzpatrick E.L.
<Pub. Astr. Soc. Pac. 102, 379 (1990)>
=1990PASP..102..379W 1990PASP..102..379W
ADC_Keywords: Stars, early-type; MK spectral classification; Stars, OB
Description:
The Atlas provides digital spectra to assist the classification
of OB spectra for 78 standard objects in the wavelength range
395.0-475.0 nm. Spectral types range from O3 - B3 (-B8 at Ia).
The Atlas provides contemporary digital data comparable to the
earlier printed Atlasses by Morgan et al. (1943), Abt et al.
(1968), Yamashita et al. (1977) and Morgan et al. (1978).
The digital data were obtained with the Shectman/Heathcote two-
dimensional, photon-counting detector on the Casegrain spectrograph
at the CTIO 1-meter telescope during October 1988 and March 1989.
The 3-pixel resolution is 1.5 Angstroem, and the full wavelength
coverage is 3800-5000 A. The data were extracted and rectified by
using a uniform template followed by a low-order spine fit.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
objects.dat 66 78 List of OB stars included in the Atlas
fits/* . 78 Directory with the 78 FITS Spectra
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Byte-by-byte Description of file: objects.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- FileName Name of FITS file in subdirectory fits
14- 15 I2 h RAh Right Ascension J2000 (hours) (1)
17- 18 I2 min RAm Right Ascension J2000 (minutes) (1)
20- 23 F4.1 s RAs Right Ascension J2000 (seconds) (1)
25 A1 --- DE- Declination J2000 (sign)
26- 27 I2 deg DEd Declination J2000 (degrees) (1)
29- 30 I2 arcmin DEm Declination J2000 (minutes) (1)
32- 33 I2 arcsec DEs ? DEs Declination J2000 (seconds) (1)
35- 39 F5.2 mag Vmag Visual magnitude (1)
41- 45 A5 --- Sp Spectral Type
47- 54 A8 --- LClass Luminosity Class
56- 64 A9 --- alt Other name
66 A1 --- note [ a] a=not in the published atlas
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Note (1): data added at CDS, using the SIMBAD data-base.
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References:
Morgan, W.W., Keenan, P.C. and Kellman, E. 1943, An Atlas of Stellas
Spectra (Chicago: University of Chicago Press).
Abt, H.A., Meinel, A.B., Morgan, W.W., and Tabscott, J.W. 1968,
An Atlas of Low-Dispersion Grating Stellar Spectra.
Yamashita, Y., Nariai, K., Norimoto, Y. 1977, An Atlas of Representative
Stellar Spectra (Tokyo: University of Tokyo Press).
Morgan, W.W., Abt, H.A., and Tabscott, J.W. 1978, Revised MK Spectral
Atlas for Types Earlier than the Sun
(End) Paul Kuin (NASA/ADC) 25-Feb-1997