AGILE, Fermi, Swift, and GASP-WEBT multi-wavelength observations of the high-redshift blazar 4C 71.07 in outburst
Nov 19, 20188 pages
Published in:
- Astron.Astrophys. 621 (2019) A82
- Published: Jan 1, 2019
e-Print:
- 1811.07654 [astro-ph.HE]
DOI:
- 10.1051/0004-6361/201732532 (publication)
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Abstract: (EDP Sciences)
Context. The flat-spectrum radio quasar 4C +71.07 is a high-redshift (z = 2.172), γ-loud blazar whose optical emission is dominated by thermal radiation from the accretion disc.Aims. 4C +71.07 has been detected in outburst twice by the AGILE γ-ray satellite during the period from the end of October to mid-November 2015, when it reached a γ-ray flux of the order of F(E > 100 MeV)=(1.2 ± 0.3)×10−6 photons cm−2 s−1 and F(E > 100 MeV)=(3.1 ± 0.6)×10−6 photons cm−2 s−1, respectively, allowing us to investigate the properties of the jet and the emission region.Methods. We investigated its spectral energy distribution by means of almost-simultaneous observations covering the cm, mm, near-infrared, optical, ultraviolet, X-ray, and γ-ray energy bands obtained by the GASP-WEBT Consortium and the Swift, AGILE, and Fermi satellites.Results. The spectral energy distribution of the second γ-ray flare (whose energy coverage is more dense) can be modelled by means of a one-zone leptonic model, yielding a total jet power of about 4 × 1047 erg s−1.Conclusions. During the most prominent γ-ray flaring period our model is consistent with a dissipation region within the broad-line region. Moreover, this class of high-redshift, flat-spectrum radio quasars with high-mass black holes might be good targets for future γ-ray satellites such as e-ASTROGAM.Key words: acceleration of particles / radiation mechanisms: non-thermal / relativistic processes / quasars: supermassive black holes / quasars: individual: 4C +71.07 / gamma rays: galaxies⋆ Partly based on data taken and assembled by the WEBT collaboration and stored in the WEBT archive at the Osservatorio Astrofisico di Torino – INAF (http://www.oato.inaf.it/blazars/webt).⋆⋆ Deceased.Note:
- Accepted for publication in A&A. 9 pages, 4 Figures, 3 Tables
- acceleration of particles
- radiation mechanisms: non-thermal
- relativistic processes
- quasars: supermassive black holes
- quasars: individual: 4C +71.07
- gamma rays: galaxies
References(56)
Figures(4)