X-ray source counts in the COSMOS field

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dc.creatorCappelluti, N.
dc.creatorHasinger, G.
dc.creatorBrusa, M.
dc.creatorComastri, A.
dc.creatorZamorani, G.
dc.creatorBoehringer, H.
dc.creatorBrunner, H.
dc.creatorCivano, F.
dc.creatorFinoguenov, A.
dc.creatorFiore, F.
dc.creatorGilli, R.
dc.creatorGriffiths, R. E.
dc.creatorMainieri, V.
dc.creatorMatute, I.
dc.creatorMiyaji, T.
dc.creatorSilverman, J.
dc.date2007-04-18
dc.date.accessioned2026-07-07T07:57:00Z
dc.date.available2026-07-07T07:57:00Z
dc.descriptionWe present the analysis of the source counts in the XMM-COSMOS survey using data of the first year of XMM-Newton observations. The survey covers ~2 deg^2 within the region of sky bounded by 9^h57.5^m<R.A.<10^h03.5^m; 1^d27.5^m<DEC<2^d57.5^m with a total net integration time of 504 ks. Using a maximum likelihood algorithm we detected a total of 1390 sources at least in one band. Using Monte Carlo simulations to estimate the sky coverage we produced the logN-logS relations. These relations have been then derived in the 0.5--2 keV, 2--10 keV and 5--10 keV energy bands, down to flux limits of 7.2x10^-16 erg cm^-2 s^-1, 4.0x10^-15 erg cm^-2 s^-1 and 9.7x10^-15 erg cm^-2 s^-1, respectively. These relations have been compared to previous X-ray survey and to the most recent X-ray background model finding an excellent agreement. The slightly different normalizations observed in the source counts of COSMOS and previous surveys can be largely explained as a combination of low counting statistics and cosmic variance introduced by the large scale structure.
dc.description4 pages, 4 figures, proceeding of the conference "At the edge of the Universe", Sintra, Portugal, October 2006. To be published on the Astronomical Society of the Pacific Conference Series (ASPCS)
dc.identifierhttps://arxiv.org/abs/0704.2293
dc.identifierhttp://arxiv.org/abs/0704.2293
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/127521
dc.subjectAstrophysics
dc.titleX-ray source counts in the COSMOS field
dc.typetext

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