33 citations · 53 across the 2 of their papers we have counts for
7 papers · 1 filter
Can the unresolved X-ray background be explained by emission from the optically-detected faint galaxies of the GOODS project?
M. A. Worsley, A. C. Fabian, F. E. Bauer +3
The emission from individual X-ray sources in the Chandra Deep Fields and XMM-Newton Lockman Hole shows that almost half of the hard X-ray background above 6 keV is unresolved and…
Radio and X-ray observations of an exceptional radio flare in the extreme z=4.72 blazar GB B1428+4217
M. A. Worsley, A. C. Fabian, G. G. Pooley +1
We report on the extreme behaviour of the high redshift blazar GB B1428+4217 at z=4.72. A continued programme of radio measurements has revealed an exceptional flare in the lightcu…
The unresolved hard X-ray background: the missing source population implied by the Chandra and XMM-Newton deep fields
M. A. Worsley, A. C. Fabian, F. E. Bauer +6
We extend our earlier work on X-ray source stacking in the deep XMM-Newton observation of the Lockman Hole, to the 2 Ms Chandra Deep Field North and the 1 Ms Chandra Deep Field Sou…
The Obscured X-ray Background and Evolution of AGN
A. C. Fabian, M. A. Worsley
The X-ray Background has been resolved in the 0.5-5keV band and found to consist mostly of both unabsorbed and absorbed AGN with column densities <1e23. This contrasts with the loc…
XMM-Newton observations of GB B1428+4217: confirmation of intrinsic soft X-ray absorption
M. A. Worsley, A. C. Fabian, A. Celotti +1
We report the results of XMM-Newton observations of the X-ray bright, radio-loud blazar GB B1428+4217 at a redshift of z=4.72. We confirm the presence of soft X-ray spectral flatte…
The (un)resolved X-ray background in the Lockman Hole
M. A. Worsley, A. C. Fabian, X. Barcons +3
Most of the soft and a growing fraction of the harder X-ray background has been resolved into emission from point sources, yet the resolved fraction above 7 keV has only been poorl…