The XMM-Newton wide-field survey in the COSMOS field

Abstract

Context. The COSMOS survey is a multiwavelength survey aimed to study the evolution of galaxies, AGN and large scale structures. Within this survey XMM-COSMOS a powerful tool to detect AGN and galaxy clusters. The XMM-COSMOS is a deep X-ray survey over the full 2 deg 2 of the COSMOS area. It consists of 55 XMM-Newton pointings for a total exposure of ∼1.5 Ms with an average vignetting-corrected depth of 40 ks across the field of view and a sky coverage of 2.13 deg 2 . Aims. We present the catalogue of point-like X-ray sources detected with the EPIC CCD cameras, the log N − log S relations and the X-ray colour-colour diagrams. Methods. The analysis was performed using the XMM-SAS data analysis package in the 0.5-2 keV, 2-10 keV and 5-10 keV energy bands. Source detection has been performed using a maximum likelihood technique especially designed for raster scan surveys. The completeness of the catalogue as well as log N − log S and source density maps have been calibrated using Monte Carlo simulations. Results. The catalogs contains a total of 1887 unique sources detected in at least one band with likelihood parameter det_ml > 10. The survey, which shows unprecedented homogeneity, has a flux limit of ∼1.7×10 −15 erg cm −2 s −1 , ∼9.3×10 −15 erg cm −2 s −1 and ∼1.3×10 −14 erg cm −2 s −1 over 90% of the area (1.92 deg 2 ) in the 0.5-2 keV, 2-10 keV and 5-10 keV energy band, respectively. Thanks to the rather homogeneous exposure over a large area, the derived log N − log S relations are very well determined over the flux range sampled by XMM-COSMOS. These relations have been compared with XRB synthesis models, which reproduce the observations with an agreement of ∼10% in the 5-10 keV and 2-10 keV band, while in the 0.5-2 keV band the agreement is of the order of ∼20%. The hard X-ray colors confirmed that the majority of the extragalactic sources in a bright subsample are actually type I or type II AGN. About 20% of the sources have a X-ray luminosity typical of AGN (L X > 10 42 erg/s) although they do not show any clear signature of nuclear activity in the optical spectrum.

X-shooter reveals powerful outflows in z ∼ 1.5 X-ray selected obscured quasi-stellar objects

“…The XMM-COSMOS survey (Hasinger et al 2007;Cappelluti et al 2009) consists of ∼ 1800 X-ray AGN selected over the entire 2 deg 2 COSMOS field, with complete multiwavelength data from radio to UV, including spectroscopic and photometric redshifts, as well as morphological classifica- Table 1. Main accretion and hosts galaxies properties for our 10 X-shooter targets.…”

Exploring X-Ray Binary Populations in Compact Group Galaxies With Chandra

“…These flux limits can tell us what is the number of background AGNs we expect to see inside the regions of the CG galaxies. The " N S log log -" relation of Cappelluti et al (2009) gives the number of detected X-ray point sources per angular area as a function of flux, established over 2 deg 2 in the COSMOS field. Using our flux limits and this function, we calculate how many background AGNs we would expect to detect in total in our galaxy regions.…”

The dark matter haloes of moderate luminosity X-ray AGN as determined from weak gravitational lensing and host stellar masses

“…The AGN sample used for this work is selected by combining the COSMOS XMM-Newton (XMM-COSMOS; Cappelluti et al 2009) and Chandra (C-COSMOS; Elvis et al 2009) X-ray catalogues. The XMM-COSMOS survey covers 2 deg 2 to a limiting depth of 5 × 10 −16 erg cm −2 s −1 in the soft (0.5-2 keV) band and 3 × 10 −15 erg cm −2 s −1 in the hard (2-10 keV) band.…”