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A deep ROSAT survey XV. the average QSO spectrum and its evolution
A. J. Blair, G. C. Stewart, I. Georgantopoulos +4
Using a sample of 165 X-ray selected QSOs from seven deep ROSAT fields we investigate the X-ray spectral properties of an ``average''radio-quiet broad line QSO as a function of red…
ASCA observations of Deep ROSAT fields - III. The Discovery of an Obscured Type 2 AGN at z=0.67
B. J. Boyle, O. Almaini, I. Georgantopoulos +5
We report on the discovery of a narrow-emission-line object at z=0.672 detected in a deep ASCA survey. The object, AXJ0341.4-4453, has a flux in the 2--10keV band of 1.1+/-0.27 E-1…
ASCA observations of Deep ROSAT fields - II. The 2-10keV AGN luminosity function
B. J. Boyle, I. Georgantopoulos, A. J. Blair +5
We present additional optical spectroscopic identifications of sources identified in three deep ASCA GIS fields which also form part of a deep ROSAT survey. In total, 26 ASCA sourc…
Faint galaxies and the X-ray background
O. Almaini, T. Shanks, B. J. Boyle +5
We summarise our recent work on the faint galaxy contribution to the cosmic X-ray background (XRB). At bright X-ray fluxes (in the ROSAT pass band), broad line QSOs dominate the X-…
ASCA observations of deep ROSAT fields I. the nature of the X-ray source populations
I. Georgantopoulos, G. C. Stewart, A. J. Blair +5
We present ASCA GIS observations (total exposure 100-200 ksec) of three fields which form part of our deep ROSAT survey. We detect 26 sources down to a limiting flux (2-10 keV) of…
ROSAT observations of two 'cooling flow' EMSS Galaxies
A. J. Blair, I. Georgantopoulos, G. C. Stewart
We present ROSAT observations of two luminous L~10^44 erg/s EMSS galaxies, MS1019+5139 and MS1209+3917, previously classified as 'cooling flow' galaxies. MS1019+5139 does not appea…