GRO J1655-40: ASCA and XMM-Newton Observations
Abstract
We have analyzed four ASCA observations (1994-1995, 1996-1997) and three XMM-Newton observations (2005) of this source, in all of which the source is in high/soft state. We modeled the continuum spectra with relativistic disk model kerrbb, estimated the spin of the central black hole, and constrained the spectral hardening factor fcol and the distance. If the kerrbb model applies, for normally used value of fcol (1.7), the distance cannot be very small, and fcol changes with observations.
- Publication:
-
The Central Engine of Active Galactic Nuclei
- Pub Date:
- October 2007
- DOI:
- 10.48550/arXiv.0704.0734
- arXiv:
- arXiv:0704.0734
- Bibcode:
- 2007ASPC..373..263Z
- Keywords:
-
- Astrophysics
- E-Print:
- 2 pages, 1 figure, Conference proceedings to appear in "The Central Engine of Active Galactic Nuclei", ed. L. C. Ho and J.-M. Wang (San Francisco: ASP)