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IGR J12319-0749: Evidence for Another Extreme Blazar Found with INTEGRALWe report on the identification of a new soft gamma-ray source, IGR J12319 C0749, detected with the IBIS imager on board the INTEGRAL satellite. The source, which has an observed 20 C100 keV flux of 8.3 10.12 erg cm.2 s.1, is spatially coincident with an AGN at redshift z = 3.12. The broad-band continuum, obtained by combining XRT and IBIS data, is flat ( =1.3) with evidence for a spectral break around 25 keV (100 keV in the source rest frame). X-ray observations indicate flux variability which is further supported by a comparison with a previous ROSAT measurement. IGR J12319 C0749 is also a radio emitting object likely characterized by a flat spectrum and high radio loudness; optically it is a broad-line emitting object with a massive black hole (2.8 109 solar masses) at its center. The source Spectral Energy Distribution is similar to another high redshift blazar, 225155+2217 at z = 3.668: both objects are bright, with a large accretion disk luminosity and a Compton peak located in the hard X-ray/soft gamma-ray band. IGR J12319 C0749 is likely the second most distant blazar detected so far by INTEGRAL.
Document ID
20130011801
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Bassani, L. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Bologna, Italy)
Landi, R. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Bologna, Italy)
Marshall, F. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Malizia, A. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Bologna, Italy)
Bazzano, A. (Istituto di Astrofisica e Planetologia Spaziale (INAF-IAPS) Rome, Italy)
Bird, A. J. (Southampton Univ. Highfield, United Kingdom)
Gehrels, N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ubertini, P. (Istituto di Astrofisica e Planetologia Spaziale (INAF-IAPS) Rome, Italy)
Masetti, N. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Bologna, Italy)
Date Acquired
August 27, 2013
Publication Date
January 1, 2012
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN6805
Funding Number(s)
CONTRACT_GRANT: ASI I/033/10/0
Distribution Limits
Public
Copyright
Public Use Permitted.

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