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Optical observations of the X-ray source 2S0921-630

Branduardi-Raymont, G; Corbet, R; Parmar, AN; Murdin, PG; Mason, KO; (1981) Optical observations of the X-ray source 2S0921-630. Space Science Reviews , 30 (1-4) pp. 279-286. 10.1007/BF01246032.

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Abstract

We report photometric observations of the optical counterpart of the X-ray source 2S0921-630. The data, obtained at the South African Astronomical Observatory during 3 weeks in 1980 and 1981, are consistent with a 17.9 day periodic modulation of the flux in the B band. Correlated variability of the (B-V) and (U-B) colour indices with the B mag. is demonstrated and quantified. The observed B mag. and colours at maximum and minimum light are used to compute some of the system parameters. A model of 2S0921-630 is proposed in terms of a binary system in which the variable inclination of a luminous accretion disc produces the long-term modulation of the optical flux. © 1981 D. Reidel Publishing Co.

Type: Article
Title: Optical observations of the X-ray source 2S0921-630
DOI: 10.1007/BF01246032
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: http://discovery.ucl.ac.uk/id/eprint/178180
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