Distribution of the Galactic bulge emission at according to the RXTE Galactic Center scans

Free access article

Issue		A&A Volume 410, Number 3, November II 2003


Page(s)		865 - 870
Section		Stellar clusters and associations
DOI		http://dx.doi.org/10.1051/0004-6361:20031312

A&A 410, 865-870 (2003)
DOI: 10.1051/0004-6361:20031312

Distribution of the Galactic bulge emission at $\mathsf{\vert\textit{b}\vert>2^\circ}$ according to the RXTE Galactic Center scans

M. Revnivtsev

Max-Planck-Institute für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany

Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia
(Received 3 December 2002 / Accepted 11 August 2003)

Abstract
We present an analysis of the Galactic bulge emission observed by the RXTE/PCA during a set of scans over the Galactic Center field, performed in 1999-2001. The total exposure time of these observations is close to 700 ks. We construct the distribution of Galactic ridge emission intensity and spectral parameters up to Galactic latitudes $b\sim -10^\circ;+9^\circ$ . We show that the intensity distribution of the ridge emission at $\vert b\vert>2^\circ$ could be well described by an exponential model with e-folding width $b_0\sim 3.3^\circ$ . Best-fit spectral parameters do not show statistically significant changes over Galactic latitude.

Key words: accretion, accretion disks -- black hole physics -- instabilities -- stars: binaries: general -- X-rays: general -- X-rays: stars

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