The ELAIS deep X-ray survey

C. J. Willott, O. Almaini, J. Manners, O. Johnson, A. Lawrence, J. S. Dunlop, R. G. Mann, I. Perez-Fournon, E. Gonzalez-Solares, F. Cabrera-Guerra, S. Serjeant, S. J. Oliver, M. Rowan-Robinson

Research output: Contribution to conferencePaperpeer-review


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 two 75 ks ACIS-I observations in the well-studied ELAIS N1 and N2 areas. 90% of the X-ray sources are identified optically to R=26 with a median magnitude of R=24. We show that objects which are unresolved optically (i.e. quasars) follow a correlation between their optical and X-ray fluxes, whereas galaxies do not. We also find that the quasars with fainter optical counterparts have harder X-ray spectra, consistent with absorption at both wavebands. Initial spectroscopic follow-up has revealed a large fraction of high-luminosity Type 2 quasars. The prospects for studying the evolution of the host galaxies of X-ray selected Type 2 AGN are considered.
Original languageEnglish
Publication statusPublished - 2001
EventXXIst Moriond Astrophysics Meeting - Savoie, France, France
Duration: 10 Mar 200117 Mar 2001


ConferenceXXIst Moriond Astrophysics Meeting
CitySavoie, France


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