Publications (12)
The Search for AGN in Distant Galaxy Clusters
R. Dowsett, O. Johnson, P. N. Best +1
We are undertaking the first systematic study of the prevalence of AGN activity in a large sample of high redshift galaxy clusters. Local clusters contain mainly red elliptical gal…
Obscured AGN from the ELAIS Deep X-ray Survey
C. J. Willott, C. Simpson, O. Almaini +13
The sources discovered in deep hard X-ray surveys with 2-8 keV fluxes of 10^-14 erg cm^-2 s^-1 make up the bulk of the X-ray background at these energies. We present here detailed…
The AGN content of the z=0.83 cluster MS1054-0321
O. Johnson, P. N. Best, O. Almaini
We present a survey of X-ray point sources in a 91 ksec Chandra ACIS-S observation of the z=0.83 cluster MS1054-0321. We detect 47 X-ray sources within the 8.3 arcmin by 8.3 arcmin…
0.5 Mpc-scale extended X-ray emission in 4C 23.56
O. Johnson, O. Almaini, P. N. Best +1
We present an XMM-Newton observation of the radio galaxy 4C 23.56 at z=2.48 which reveals extended X-ray emission coincident with the radio lobes spanning \~0.5 Mpc. These are the…
The ELAIS Deep X-ray Survey I: Chandra Source Catalogue and First Results
J. C. Manners, O. Johnson, O. Almaini +10
We present an analysis of two deep (75 ks) Chandra observations of the European Large Area ISO Survey (ELAIS) fields N1 and N2 as the first results from the ELAIS deep X-ray survey…
The X-ray properties of optically-selected z>0.6 clusters in the ESO Distant Cluster Survey
O. Johnson, P. Best, D. Zaritsky +11
We present XMM-Newton observations of three optically-selected z > 0.6 clusters from the ESO Distant Cluster Survey (EDisCS), comprising the first results of a planned X-ray survey…
The ELAIS Deep X-ray Survey
C. J. Willott, O. Almaini, J. Manners +10
We present initial follow-up results of the ELAIS Deep X-ray Survey which is being undertaken with the Chandra and XMM-Newton Observatories. 235 X-ray sources are detected in our t…
A hybrid TIM-NOMA scheme for the Broadcast Channel
V. Kalokidou, O. Johnson, R. Piechocki
Future mobile communication networks will require enhanced network efficiency and reduced system overhead. Research on Blind Interference Alignment and Topological Interference Man…
The coincidence and angular clustering of Chandra and SCUBA sources
O. Almaini, S. E. Scott, J. S. Dunlop +16
We explore the relationship between the hard X-ray and sub-mm populations using deep Chandra observations of a large, contiguous SCUBA survey. In agreement with other recent findin…
Mid-infrared sources in the ELAIS Deep X-ray Survey
J. C. Manners, S. Serjeant, S. Bottinelli +9
We present a cross-correlation of the European Large Area ISO survey (ELAIS) with the ELAIS Deep X-ray Survey of the N1 and N2 fields. There are 7 Chandra point sources with matche…
First Light Measurements of Capella with the Low Energy Transmission Grating Spectrometer aboard the Chandra X-ray Observatory
A. C. Brinkman, C. J. T. Gunsing, J. S. Kaastra +20
We present the first X-ray spectrum obtained by the Low Energy Transmission Grating Spectrometer (LETGS) aboard the Chandra X-ray Observatory. The spectrum is of Capella and covers…
The evolution of the brightest cluster galaxies since z~1 from the ESO Distant Cluster Survey (EDisCS)
I. M. Whiley, A. Aragon-Salamanca, G. De Lucia +13
[Abridged] We present K-band data for the brightest cluster galaxies (BCGs) from the ESO Distant Cluster Survey. These data are combined with photometry from Aragon-Salamanca et al…