Determination of a binary period for the variable X-ray source A1907 + 09
Open Access
- 1 November 1980
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 193 (1) , 7P-13P
- https://doi.org/10.1093/mnras/193.1.7p
Abstract
An analysis of observations of A1907 + 09 made with the Ariel V Sky Survey Instrument between 1974 November and 1980 February has revealed a binary period of 8.380 ± 0.002 day. During the last observation, in 1980 January, a long outburst was observed and limited spectral information was obtained. The light curve supports the proposition that A1907 + 09 is a member of the class of X-ray binaries containing a massive optical component.Keywords
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