Optical identification of sources from the HELLAS2XMM survey

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dc.creatorFiore, F.
dc.creatorMatt, G.
dc.creatorLa Franca, F.
dc.creatorPerola, G. C.
dc.creatorBrusa, M.
dc.creatorComastri, A.
dc.creatorMignoli, M.
dc.creatorCiliegi, P.
dc.creatorSevergnini, P.
dc.creatorMaiolino, R.
dc.creatorBaldi, A.
dc.creatorMolendi, S.
dc.creatorVignali, C.
dc.date2001-09-07
dc.date.accessioned2026-07-07T01:59:52Z
dc.date.available2026-07-07T01:59:52Z
dc.descriptionWe present preliminary results on the optical identifications of sources from the High Energy Large Area Survey performed with XMM-Newton (HELLAS2XMM). This survey covers about 3 square degrees of sky down to a 2-10 keV flux of 7 x 10^-15 erg cm-2 s-1 (Baldi & Molendi these proceedings, Baldi et al. 2001). The survey good sensitivity over a large area allows us to confirm and extend previous Chandra results about a population of X-ray luminous but optically dull galaxies emerging at 2-10 keV fluxes of about 10-14 erg cm-2 s-1. Although the statistics are still rather poor, it appears that at these X-ray fluxes the fraction of these galaxies is similar or even higher than that of narrow line AGN.
dc.description6 pages, 4 figures, presented at the meeting: "Issues in unifications of AGNs", Marciana Marina, May 2001; eds. R. Maiolino, A. Marconi and N. Nagar
dc.identifierhttps://arxiv.org/abs/astro-ph/0109116
dc.identifierhttp://arxiv.org/abs/astro-ph/0109116
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/3290
dc.subjectAstrophysics
dc.titleOptical identification of sources from the HELLAS2XMM survey
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