Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17079c&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present timing and broad-band (3-1000 keV) spectral analyses of joint RXTE/OSSE data obtained for Cygnus X-1 during December 1998. Using the EQPAIR XSPEC model, we demonstrate that a pure thermal Comptonization model, with Compton reflection, fits the 3-1000 keV data well. No additional components are necessary to fit the data, although the presence of an additional non-thermal component does marginally improve the goodness of fit. Two of the observations can also be better fit by a hybrid model where most of the electrons have a steep power-law (non-thermal) energy distribution. We discuss how to the break the degeneracy between the spectral models. The observed spectrum between 30-50 keV does not show strong curvature. For either continuum model, this implies that the fraction of the continuum flux that is Compton reflected must be intrinsically low. Strongly ionizing the reflecting matter can supress reflection features at lower energies but not at these energies. We discuss the constraints on flux variability models from higher order timing statistics such as the skewness and bispectrum.
Coppi Paolo
Maccarone Thomas
No associations
LandOfFree
Broad-Band RXTE/OSSE Observations of Cygnus X-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Broad-Band RXTE/OSSE Observations of Cygnus X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Broad-Band RXTE/OSSE Observations of Cygnus X-1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1538083