Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17075f&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
Low frequency (1-10 Hz) quasi-periodic oscillations (QPO) have been observed from the black hole candidate GRS 1915+105 by the Rossi X-ray Timing Explorer in 1996 and 1997 when this source was in a low luminosity hard state. The frequency of the QPO's is generally observed to increase with the total intensity but the relationship is not unique. We have performed spectral and temporal analysis of a representative number of 1996 and 1997 PCA and HEXTE observations. We find that the time averaged spectral flux for 1997 can be fit to a power law and a small (less than 20% of the total flux) disk black body component. For the 1996 data the thermal flux component is weaker, i.e less than 10% of the total. A correlation between QPO frequency and power law index is observed for each data set. However, a correlation between thermal flux and the QPO frequency is observed only for the 1997 data. No correlation between disk temperature and QPO frequency is observed for either set of data.
Fiorito Ralph B.
Markwardt Craig B.
Swank Jean H.
No associations
LandOfFree
X-ray spectra and QPO's observed in the low hard states of GRS1915+105 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 X-ray spectra and QPO's observed in the low hard states of GRS1915+105, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray spectra and QPO's observed in the low hard states of GRS1915+105 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1538056