The X-ray flux variations of Cygnus X-2

Details The X-ray flux variations of Cygnus X-2 The X-ray flux variations of Cygnus X-2

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..232b&link_type=abstract

Astronomy and Astrophysics, vol. 116, no. 2, Dec. 1982, p. 232-236. Research supported by the Nederlandse Organisatie voor Zuiv

Astronomy and Astrophysics

Astronomy

11

Cygnus Constellation, Radiant Flux Density, X Ray Sources, Cos-B Satellite, Ultraviolet Astronomy

Scientific paper

Results of a 47 d observation of Cygnus X-2 by the COS-B X-ray experiment are presented. The observed variability of the X-ray intensity is investigated for the presence of modulation at either the 9.843 d optical period or the 11.23 d X-ray period claimed for this source. Upper limits are given to pulse amplitudes for periods between 1 d and 200 s. Clear dips were observed during the time of highest source intensity, with transitions of up to 40 percent in the source flux in less than 1000-2000 s. It is suggested that the dips may be connected to the reported UV flaring activity.

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