Optical and X-ray observations of 2S 0921-630

Details Optical and X-ray observations of 2S 0921-630 Optical and X-ray observations of 2S 0921-630

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..403b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Oct. 1983, p. 403-416. Research supported by the S

Astronomy and Astrophysics

Astronomy

20

Eclipsing Binary Stars, Light Curve, Radial Velocity, Stellar Motions, Stellar Spectrophotometry, X Ray Sources, Astronomical Photography, Orbital Elements, Spectral Line Width, Stellar Models, Ubv Spectra, X Ray Spectra

Scientific paper

The present investigation is concerned with photometric and spectroscopic measurements of 2S 0921-630 covering the years 1975-82. The X-ray source 2S 0921-630 was discovered by Li et al. (1978) and identified with an approximately 17th magnitude star showing He II 4686 A and H-beta in emission. Attention is given to photoelectric photometry, photographic photometry, aspects of periodic behavior, spectroscopy, radial velocity measurements and equivalent widths, and X-ray observations. It is found that the radial velocity data confirm the 9-day period previously suggested for the system and exclude alternative periods of 17.9 and 7.7 days.

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