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AGILE and blazars: the unexpected, the unprecedented, and the uncut

Abstract

AGILE has been coordinating multi-wavelength campaigns on active galactic nuclei with several major observing facilities since its launch in 2007. This effort allowed us to investigate some remarkable sources both on short and on long time-scales, deriving information on the physical mechanisms responsible for the emission in different energy bands. A complete review of the whole set of AGILE results on extra-galactic sources and their theoretical interpretation is well beyond the scope of this paper, therefore I will present an overview on an handful of outstanding objects and describe the most recent observations.

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Fig. 1
Fig. 2

Figure from Vercellone et al. (2010) (color figure online)

Fig. 3

Data from Vercellone et al. (2011) (color figure online)

Fig. 4

Adapted from Vercellone et al. (2019) (color figure online)

Fig. 5

From Pittori et al. (2018) (color figure online)

Fig. 6

From Piano et al. (2018) (color figure online)

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Acknowledgements

The author acknowledges the AGILE Team and the colleagues of the many observing facilities who still make it possible to achieve these extraordinary results.

Funding

The author acknowledges financial contribution from the Grant ASI I/028/12/0 and from the agreement ASI-INAF no. 2017-14-H.0.

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Correspondence to Stefano Vercellone.

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This paper is the peer-reviewed version of a contribution selected among those presented at the Conference on Gamma-Ray Astrophysics with the AGILE Satellite held at Accademia Nazionale dei Lincei and Agenzia Spaziale Italiana, Rome on December 11–13, 2017.

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Vercellone, S. AGILE and blazars: the unexpected, the unprecedented, and the uncut. Rend. Fis. Acc. Lincei 30, 131–135 (2019). https://doi.org/10.1007/s12210-019-00818-4

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Keywords

  • Gamma rays: observations
  • Blazars
  • Jetted sources