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Why the universe is unexpectedly transparent to very high energy gamma rays
(Sissa Medialab, 2017)
Recent observations of distant gamma ray sources indicate that the universe may be more transparent to VHE-gamma-rays than expected. In this paper we study the reduction of the EBL gamma-gamma opacity due to the existence ...
Studies of optical/gamma-ray flares of blazar 4C+01.02: recent updates from the 2016-2017 observations
(Sissa Medialab, 2017)
The flat spectrum radio quasar 4C +01.02 became one of the brightest active galactic nuclei detected at high redshift (z = 2.1) in gamma rays when it underwent a series of outbursts during several months in 2016. We monitored ...
Multi-wavelength observations of flaring blazars with ATOM and Fermi-LAT
(Sissa Medialab, 2017)
The Automatic Telescope for Optical Monitoring is a 75cm optical telescope located at the H.E.S.S. site in Namibia. Since 2005, it monitors around 250 gamma-ray emitting AGN and has observed numerous blazar flares in several ...
On the underlying particles in the jet of 3C 279
(PoS, 2017)
Recent high-energy missions have allowed keeping watch over blazars in flaring states, which
provide deep insights into the engine powered by supermassive black holes. However, having
a blazar caught in a very bright ...
Challenges in reconciling observations and theory of the brightest high-energy flare ever of 3C 279
(PoS, 2017)
Recent high-energy missions have allowed keeping watch over blazars in flaring states, which
provide deep insights into the engine powered by supermassive black holes. However, having
a quasar caught in a very bright ...
The dependence of optical polarisation of blazars on the synchrotron peak frequency
(PoS, 2017)
The RoboPol instrument and the relevant program was developed in order to conduct a systematic
study of the optical polarisation variability of blazars. Driven by the discovery that long smooth
rotations of the optical ...
Diagnosing relativistic particle acceleration in AGN jets
(AIP, 2017)
Mildly relativistic, oblique shocks are generally considered to be among the most plausible sites of relativistic particle acceleration and the subsequent production of strongly variable, polarized multi-wavelength emission ...