Optical Eclipses in 2S0921-630

Details Optical Eclipses in 2S0921-630 Optical Eclipses in 2S0921-630

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....94l...3c&link_type=abstract

Astronomy and Astrophysics, Vol. 94, P. L3, 1981

Astronomy and Astrophysics

Astrophysics

18

Scientific paper

Optical photometry of the 2S 0921-630 optical counterpart reveals deep recurrent eclipses. Observations presently available are consistent with either a 19.99 h period or a period longer than 4 d. The exit from eclipse takes place with no U-B color change but there is a D.2 mag change in B-V. The data are consistent with a binary model where a low-mass late-type companion periodically occults part of an accretion disk surrounding the X-ray source.

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