Two ROSAT HRI observations of GRO J1655-40.
Abstract
GRO J1655-40 was observed with the ROSAT HRI on two occasions: ones (in August 1994) between the first and the second outbursts in 1994, and ones between a soft and a hard X-ray outburst (in March 1995). The first observation allowed to improve the X-ray position, thus confirming the optical and radio identification. In addition, a distance of d=~3kpc is derived using the dust scattering halo. The combination with radio measurements suggests that the X-ray emission originated in an accretion disk or corona rather then in a jet. The results of the second ROSAT observation and the comparison with earlier TTM observations suggest that the X-rays at this epoch were emitted from an accretion disk.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- December 1996
- Bibcode:
- 1996A&AS..120C.239G
- Keywords:
-
- STARS: INDIVIDUAL: GRO J1655-40;
- X-RAYS: STARS;
- STARS: DISTANCES;
- BINARIES: ECLIPSING;
- ACCRETION;
- ACCRETION DISK