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Constraining relativistic bow shock properties in rotation-powered millisecond pulsar binaries
(AAS, 2017)
Multiwavelength follow-up of unidentified Fermi sources has vastly expanded the number of known galactic-field "black widow" and "redback" millisecond pulsar binaries. Focusing on their rotation-powered state, we interpret ...
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 ...
EBL inhomogeneity and hard-spectrum gamma-ray sources
(IOP Publishing, 2017)
The unexpectedly hard very-high-energy (VHE; E > 100 GeV) γ-ray spectra of a few distant blazars have been interpreted as evidence of a reduction of the γγ opacity of the universe due to the interaction of VHE γ-rays with ...
Relativistic shear flow between electron-ion and electron-positron plasmas and astrophysical applications
(IOP, 2017)
We present particle-in-cell simulation results of relativistic shear boundary layers between electron–ion and
electron–positron plasmas and discuss their potential applications to astrophysics. Specifically, we find that ...
Probing acceleration and turbulence at relativistic shocks in blazar jets
(Oxford Univ Press, 2017)
Diffusive shock acceleration (DSA) at relativistic shocks is widely thought to be an important acceleration mechanism in various astrophysical jet sources, including radio-loud active galactic nuclei such as blazars. Such ...
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 ...