/ftp/cats/J_A+A/397/./711



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J/A+A/397/711       Comptonization and reflection in GRS 1915+105   (Rau+, 2003)
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	table2.dat
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Beginning of ReadMe : J/A+A/397/711 Comptonization and reflection in GRS 1915+105 (Rau+, 2003) ================================================================================ Comptonization and reflection of X-ray radiation and the X-ray-radio correlation in the chi-states of GRS 1915+105. Rau A., Greiner J. <Astron. Astrophys. 397, 711 (2003)> =2003A&A...397..711R ================================================================================ ADC_Keywords: X-ray sources ; Binaries, X-ray Keywords: X-ray: stars - stars: binaries: close - X-rays: individual: GRS 1915+105 Abstract: We present a comprehensive X-ray study of four years of pointed RXTE observations of GRS 1915+105 in the chi-state. We interpret the behavior of the hard power law tail spectrum as coming from inverse Compton scattering of soft disk photons on a thermally dominated hybrid corona above the accretion disk. GRS 1915+105 shows a strong, variable reflection amplitude. As in other BHC and in Seyfert galaxies, a correlation between the power law slope and the reflection was found. Also, the radio fluxes at 2.25GHz and 15GHz correlate with the power law slope, thus revealing a connection between the outflowing matter and the comptonizing region in the chi-states. Description: Results of the analysis of 139 RXTE spectra of GRS 1915+105 in the chi-state are shown. PCU0 of the Proportional Counter Array (PCA) and High Energy X-Ray Timing Experiment (HEXTE) Cluster 0 data were fitted in XSPEC 11.0 with a model consisting of of (i) photoelectric absorption (WABS; Balucinska-Church & McGammon, 1992, Cat. VI/62), (ii) a spectrum from an accretion disk consisting of multiple blackbody components (DISKBB) and (iii) a power law spectrum reflected from an ionized relativistic accretion disk (REFSCH; Fabian et al., 1989MNRAS.238..729F, Magdziarz & Zdziarski, 1995MNRAS.273..837M). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 19 15 11.5 +10 56 44 GRS 1915+105 ----------------------------------------------------------