NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-04-20 T08:36:06 PDT
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For refcode 2006A&A...455...11M:
Retrieve 7 NED objects in this reference.
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2006A&A...455...11M Unveiling the nature of INTEGRAL objects through optical spectroscopy IV. A study of six new hard X-ray sources N. Masetti; L. Bassani; A. Bazzano; A. J. Bird; A. J. Dean; A. Malizia; L. Norci; E. Palazzi; A. D. Schwope; J. B. Stephen; P. Ubertini; R. Walter Received 28 February 2006 / Accepted 21 April 2006 We present further results from our onging optical spectrophotometric campaign at the Astronomical Observatory of Bologna in Loiano (Italy) on unidentified hard X-ray sources detected by INTEGRAL. We observed spectroscopically the putative optical counterparts of the INTEGRAL sources IGR J00234+6141, IGR J01583+6713, IGR J06074+2205, IGR J13091+1137 and IGR J20286+2544. We find that the first two are Galactic objects, namely a Cataclysmic Variable at a distance d ~ 300 pc and a Be/X transient High-Mass X-ray Binary (HMXB) located at ~6.4 kpc, respectively, whereas the last one is identified with MCG +04-48-002, a Starburst/H II galaxy at redshift z = 0.013 hiding a Seyfert 2 nucleus. We identify IGR J13091+1137 as the (likely Seyfert 2 type) active nucleus of galaxy NGC 4992, which we classify as an X-ray Bright, Optically Normal Galaxy; this is the first example of this type of object to be detected by INTEGRAL, and one of the closest of this class. We moreover confirm the possible Be/X nature of IGR J06074+2205, and we estimate it to be at a distance of ~1 kpc. We also reexamine the spectrum of the z = 0.087 elliptical radio galaxy PKS 0352-686, the possible counterpart of the INTEGRAL source IGR J03532-6829, and we find that it is a BL Lac. Physical parameters for these sources are also evaluated by discussing our findings in the context of the available multiwavelength information. These identifications further stress the importance of INTEGRAL in the study of the hard X-ray spectrum of Active Galactic Nuclei, HMXBs and Cataclysmic Variables. Key words: galaxies: Seyfert, galaxies: BL Lacertae objects: individual:, PKS 0352-686, stars: novae, cataclysmic variables, X-rays:, binaries, techniques: spectroscopic, X-rays: general
Retrieve 7 NED objects in this reference.
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