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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26209
Title: 3C 279 IN OUTBURST IN 2015 JUNE: A BROADBAND SED STUDY BASED ON THEINTEGRALDETECTION
Authors: BOTTACINI, EUGENIO
Böttcher, Markus
PIAN, Elena 
Collmar, Werner
Issue Date: 2016
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 832
Issue: 1
First Page: 17
Abstract: Blazars radiate from radio through gamma-ray frequencies and thereby make ideal targets for multifrequency studies. Such studies allow the properties of the emitting jet to be constrained. 3C 279 is among the most notable blazars and therefore subject to extensive multifrequency campaigns. We report the results of a campaign ranging from near-IR to gamma-ray energies that targeted an outburst of 3C 279 in 2015 June. The campaign pivots around the detection in only 50 ks by INTEGRAL, whose IBIS/ISGRI data pin down the high-energy component of the spectral energy distribution (SED) between Swift-XRT data and Fermi-LAT data. The overall SED from near-IR to gamma rays can be well represented by either a leptonic or a lepto-hadronic radiation transfer model. Even though the data are equally well represented by the two models, their inferred parameters challenge the physical conditions in the jet. In fact, the leptonic model requires parameters with a magnetic field far below equipartition with the relativistic particle energy density. In contrast, equipartition may be achieved with the lepto-hadronic model, although this implies an extreme total jet power close to the Eddington luminosity.
URI: http://hdl.handle.net/20.500.12386/26209
URL: https://iopscience.iop.org/article/10.3847/0004-637X/832/1/17
ISSN: 0004-637X
DOI: 10.3847/0004-637X/832/1/17
Bibcode ADS: 2016ApJ...832...17B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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