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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 J12319-0749, detected with the IBIS imager on board the INTEGRAL satellite. The source, which has an observed 20−100 keV flux of approx 8.3 × 10(exp -12) erg/sq. cm/ s, is spatially coincident with an active galactic nucleus (AGN) at redshift z = 3.12. The broad-band continuum, obtained by combining XRT and IBIS data, is flat (Gamma = 1.3) with evidence for a spectral break around 25 keV (100 keV in the source restframe). X-ray observations indicate flux variability, which is also supported by a comparison with a previous ROSAT measurement. IGR J12319-0749 is also a radio-emitting object likely characterised by a flat spectrum and high radio loudness; optically it is a broad-line emitting object with a massive black hole (2.8 × 10(exp 9) solar masses) at its centre. The source spectral energy distribution is similar to another high-redshift blazar, 225155+2217 at z = 3.668: both objects are bright, with a high accretion disk luminosity and a Compton peak located in the hard X-ray/soft gamma-ray band. IGR J12319-0749 is likely the second-most distant blazar detected so far by INTEGRAL.
Document ID
20140009245
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1051/0004-6361/201219243
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
July 16, 2014
Publication Date
July 1, 2012
Publication Information
Publication: Astronomy & Astrophysics
Publisher: Astronomy & Astrophysics
Volume: 543
ISSN: 0004-6361
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN9886
Funding Number(s)
CONTRACT_GRANT: ASI I/033/10/0
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
IGRJ12319-0749
active-x-rays
General-x-rays

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