The X-ray flux variations of CYG X-2.
Abstract
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- December 1982
- Bibcode:
- 1982A&A...116..232B
- Keywords:
-
- Cygnus Constellation;
- Radiant Flux Density;
- X Ray Sources;
- Cos-B Satellite;
- Ultraviolet Astronomy;
- Astronomy