The Bright $\gamma$-ray Flare of 3C 279 in June 2015: AGILE Detection and Multifrequency Follow-up Observations - INSPIRE

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The Bright $\gamma$ -ray Flare of 3C 279 in June 2015: AGILE Detection and Multifrequency Follow-up Observations

Mar 20, 2018

9 pages

Published in:

Astrophys.J. 856 (2018) 2, 99

Published: Mar 28, 2018

e-Print:

1803.07529 [astro-ph.HE]

DOI:

10.3847/1538-4357/aab1f9

View in:

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Abstract: (IOP)

We report the AGILE detection and the results of the multifrequency follow-up observations of a bright γ-ray flare of the blazar 3C 279 in 2015 June. We use AGILE and Fermi gamma-ray data, together with Swift X-ray andoptical-ultraviolet data, and ground-based GASP-WEBT optical observations, including polarization information, to study the source variability and the overall spectral energy distribution during the γ-ray flare. The γ-ray flaring data, compared with as yet unpublished simultaneous optical data that will allow constraints on the big blue bump disk luminosity, show very high Compton dominance values of ∼100, with the ratio of γ-ray to optical emission rising by a factor of three in a few hours. The multiwavelength behavior of the source during the flare challenges one-zone leptonic theoretical models. The new observations during the 2015 June flare are also compared with already published data and nonsimultaneous historical 3C 279 archival data.

Note:

13 pages, 5 figures,5 Tables. Accepted for publication in ApJ

galaxies: active
gamma rays: galaxies
polarization
quasars: individual
radiation mechanisms: non-thermal
X-rays: general

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Figures(5)

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