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New AGN classifications in the Swift/BAT All-Sky Hard X-ray Survey

By Pietro Parisi and for the IBIS Team


Through an optical campaign performed at the San Pedro Martir (Mexico) Telescope and using the 6dF archive (, Jones et al. 2004), we determine or give a better classification for 8 newly discovered Active Galactic Nuclei (AGN) in the Swift/BAT 22-months All-sky Hard X-ray Survey (Baumgartner et al. 2008, Tueller et al. 2010). All these objects have observations taken with Swift/XRT or Chandra or XMM archival data which allowed us to pinpoint their optical counterpart thanks to the precise (better than a few arcsec) soft X-ray positions afforded by these observatories. This information enabled us to obtain optical spectra of all these counterparts, since only three spectra are available on-line, but not flux calibrated, allowing us to reveal their real nature (Baumgartner et al. 2008 give only a tentative classification based upon their X-ray properties). Here we present the spectra, along with the corresponding finding charts obtained from the DSS-II red survey, of these 8 sources. We found that our sample is composed of 7 Seyfert 2 and one Seyfert 1, with redshift between 0.009 and 0.068.Comment: 5 pages, 2 figures, 1 table; Poster. Published in the proceedings of "The restless Gamma-ray Universe", September 27-30, 2010, Dublin, Irelan

Topics: Astrophysics - Cosmology and Nongalactic Astrophysics
Year: 2011
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