2.3k citations · 41.1k across the 542 of their papers we have counts for
14 papers · 2 filters
X-ray continuum variability of MCG-6-30-15
S. Vaughan, A. C. Fabian, K. Nandra
This paper presents a comprehensive examination of the X-ray continuum variability of the bright Seyfert 1 galaxy MCG-6-30-15. The source clearly shows the strong, linear correlati…
Optical and near-infrared observations of hard serendipitous Chandra sources
C. S. Crawford, P. Gandhi, A. C. Fabian
We have been carrying out a successful observational programme targeted at finding the highly obscured quasars that are thought to be the main contributors to the hard X-ray backgr…
Extended X-ray emission around four 3C quasars at 0.55<z<0.75 observed with Chandra
C. S. Crawford, A. C. Fabian
We report on the detection of a soft spatially-extended component of X-ray emission around four intermediate-redshift 3C quasars observed with Chandra: 3C254, 3C263, 3C275.1 and 3C…
XMM-Newton observations of two hyperluminous IRAS galaxies: Compton-thick quasars with obscuring starbursts
R. J. Wilman, A. C. Fabian, C. S. Crawford +1
We present XMM-Newton observations of two hyperluminous IRAS galaxies (L_Bol>1E13 L_sun), neither of which was previously detected by ROSAT. Published models of the infrared SEDs i…
X-ray background synthesis: the infrared connection
P. Gandhi, A. C. Fabian
We present a synthesis model of the X-ray background based on the cross-correlation between mid-infrared and X-ray surveys, where the distribution of type 2 sources is assumed to f…
A Chandra observation of the H2O megamaser IC2560
K. Iwasawa, P. R. Maloney, A. C. Fabian
A short Chandra ACIS-S observation of the Seyfert 2 galaxy IC 2560, which hosts a luminous nuclear water megamaser, shows: 1) the X-ray emission is extended; 2) the X-ray spectrum…
Chandra temperature and metallicity maps of the Perseus cluster core
R. W. Schmidt, A. C. Fabian, J. S. Sanders
We present temperature and metallicity maps of the Perseus cluster core obtained with the Chandra X-ray Observatory. We find an overall temperature rise from ~3.0 keV in the core t…
VLT near-infrared spectra of hard serendipitous Chandra sources
P. Gandhi, C. S. Crawford, A. C. Fabian
We present near-infrared long-slit spectra of eight optically-dim X-ray sources obtained with ISAAC on the Very Large Telescope. Six of the sources have hard X-ray emission with a…
A Relativistic Fe K-alpha Emission Line in the Intermediate Luminosity BeppoSAX Spectrum of the Galactic Microquasar V4641 Sgr
J. M. Miller, A. C. Fabian, J. J. M. in 't Zand +4
Broad Fe K-alpha emission lines have recently been reported in a number of Galactic black holes. Such lines are useful accretion flow diagnostics because they may be produced at th…
The physical conditions within dense cold clouds in cooling flows II
G. J. Ferland, A. C. Fabian, R. M. Johnstone
This is a progress report on our numerical simulations of conditions in the cold cores of cooling flow condensations. The physical conditions in any non-equilibrium plasma are the…
Study of X-ray reflection features in a sample of Sy 1s observed by BeppoSAX
A. De Rosa, A. C. Fabian, L. Piro +1
The ionized disc reflection model of Ross & Fabian is applied to a sample of five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all the objects in the sample…
Accretion onto the Supermassive Black Hole in M87
Tiziana Di Matteo, Steven W. Allen, Andrew C. Fabian +2
Chandra X-ray observations of the giant elliptical galaxy M87 resolve the thermal state of the hot interstellar medium into the accretion (Bondi) radius of its central 3 10^9 Msun…
Chandra observations of Abell 2199
R. M. Johnstone, S. W. Allen, A. C. Fabian +1
We present results from an analysis of two Chandra observations of the rich, nearby galaxy cluster Abell 2199. We find evidence (having corrected for projection effects) for radial…
Powerful obscured AGN in Chandra cluster fields
P. Gandhi, A. C. Fabian, C. S. Crawford
Models for the origin of the hard X-ray background have suggested that sources with the most accretion activity lie hidden in highly obscured AGN. We report on our study of hard, s…