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Optical and X-ray observations of 2S 0921-630 (1983)

Parmar, A. N. ; Mason, K. O. ; White, N. E. ; [et al.]

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Publication Date: 2011-08-18

Description: 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.

Keywords: ASTROPHYSICS

Type: Royal Astronomical Society, Monthly Notices (ISSN 0035-8711); 205; Oct. 198

Format: text

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