EDP Sciences
Free access
Issue
A&A
Volume 444, Number 2, December III 2005
Page(s) L37 - L40
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200500205


A&A 444, L37-L40 (2005)
DOI: 10.1051/0004-6361:200500205

Letter

Identification of 8 INTEGRAL hard X-ray sources with Chandra

S. Sazonov1, 2, E. Churazov1, 2, M. Revnivtsev1, 2, A. Vikhlinin3, 2 and R. Sunyaev1, 2

1  Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
    e-mail: sazonov@mpa-garching.mpg.de
2  Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117997 Moscow, Russia
3  Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA

(Received 29 August 2005 / Accepted 22 October 2005)

Abstract
We report the results of identification of 8 hard X-ray sources discovered by the INTEGRAL observatory during the ongoing all-sky survey. These sources have been observed by Chandra. In 6 cases a bright X-ray source was found within the INTEGRAL localization region, which permitted to unambiguously identify 5 of the objects with nearby galaxies, implying that they have an active galactic nucleus (AGN), whereas one source is likely an X-ray binary in LMC. 4 of the 5 newly discovered AGNs have measured redshifts in the range 0.025-0.055. The X-ray spectra reveal the presence of significant amounts of absorbing gas ( NH in the range 1022-1024 cm-2) in all 5 AGNs, demonstrating that INTEGRAL is starting to fill in the sample of nearby obscured AGNs.


Key words: surveys -- galaxies: Seyfert -- X-rays: general

SIMBAD Objects



© ESO 2005

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