Spectral properties of faint hard X-ray selected sources

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dc.creatorPiconcelli, E.
dc.creatorBassani, L.
dc.creatorCappi, M.
dc.creatorFiore, F.
dc.creatorDi Cocco, G.
dc.creatorTrifoglio, M.
dc.date2002-02-04
dc.date.accessioned2026-07-07T02:02:39Z
dc.date.available2026-07-07T02:02:39Z
dc.descriptionWe present preliminary results from a XMM-Newton spectroscopic survey of hard (2 -10 keV) X-ray sources detected serendipitously in seven EPIC FOVs. All observations were performed during the performance/verif ication phase. The resulting sample consists of 39 sources with fluxes ranging from 3 to 80 $\t imes$ 10$^{-14}$ erg cm$^{-2}$ s$^{-1}$ in the 2-10 keV band. Most of these sources (23 out of 39, i.e. 60%) are fainter than 8 $\times $ 10$^{-14}$ erg cm$^{-2}$ s$^{-1}$. The sources have been selected in order to obtain detailed X-ray spectral inform ation, that are unprecedented at such low flux levels and for such a large sample. To date we also have optical counterparts for 23 out of 39 objects, with 0.0058 $\leq$ $z$ $\leq$ 1.187. About 70% of the sources have spectra well fitted with a simple power law model with Galactic absorption. For 9 objects (five of type 1, one of type 2 and three normal galaxies) absorption in excess to the Galactic one is required. Additional emission/absorption components (i.e. soft excess, warm absorber) are observed in 4 sources.
dc.description3 pages, 3 figures. Proceedings of the Symposium "New Visions of the X-ray Universe in the XMM-Newton and Chandra era", Noordwijk-NL, November 2001
dc.identifierhttps://arxiv.org/abs/astro-ph/0202078
dc.identifierhttp://arxiv.org/abs/astro-ph/0202078
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4116
dc.subjectAstrophysics
dc.titleSpectral properties of faint hard X-ray selected sources
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