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Accretion onto nearby supermassive black holes: Chandra constraints on the dominant cluster galaxy NGC 6166
T. Di Matteo, R. M. Johnstone, S. W. Allen +1
Chandra observations of low-luminosity supermassive black holes in nearby elliptical galaxies provide tight limits on both their nuclear luminosities and on their Bondi accretion r…
Chandra--ASCA--RXTE observations of the micro-quasar GRS 1915+105
J. C. Lee, N. S. Schulz, C. S. Reynolds +2
A Chandra AO1 30ks HETGS observation of the X-ray transient micro-quasar GRS 1915+105 reveals absorption edges and faint line emission over the HETG energy range. We find from a pr…
Chandra imaging of the X-ray core of Abell 1795
A. C. Fabian, J. S. Sanders, S. Ettori +5
We report the discovery of a 40 arcsec long X-ray filament in the core of the cluster of galaxies A1795. The feature coincides with an Halpha+NII filament found by Cowie et al in t…
Adaptive binning of X-ray galaxy cluster images
J. S. Sanders, A. C. Fabian
We present a simple method for adaptively binning the pixels in an image. The algorithm groups pixels into bins of size such that the fractional error on the photon count in a bin…
Accretion disc coronae as magnetic reservoirs
A. Merloni, A. C. Fabian
Most astrophysical sources powered by accretion onto a black hole, either of stellar mass or supermassive, when observed with hard X-rays show signs of a hot Comptonizing component…
A physical model for the hard X-ray background
R. J. Wilman, A. C. Fabian, P. E. J. Nulsen
We combine a semi-analytic galaxy formation model (Nulsen and Fabian 1997) with a prescription for the obscured growth of massive black holes (Nulsen and Fabian 2000; Fabian 1999),…