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Decomposing blazar spectra into lepto‐hadronic emission components
(Wiley, 2018)
The recently reported coincidences between high‐energy neutrino events and major blazar outbursts reinforce the relevance of lepto‐hadronic emission models for blazars. We study the influence of physical parameters on the ...
Detection of large-scale Ly α absorbers at large angles to the radio axis of high-redshift radio galaxies using SOAR
(Oxford Univ Press, 2018)
We present an investigation of the properties of the extended Ly α halo and the large-scale
H I absorbing structures associated with five high-redshift radio galaxies at z > 2, using the
Goodman long-slit spectrograph ...
Fermi/LAT counterparts of IceCube neutrinos above 100 TeV
(EDP Sciences, 2018)
The IceCube Collaboration has published four years of data and the observed neutrino flux is significantly in excess of the expected atmospheric background. Due to the steeply falling atmospheric background spectrum, events ...
Long-term X-ray variability characteristics of the narrow-line Seyfert 1 galaxy RE J1034+396
(Oxford Univ Press, 2018)
We present the results of our study of the long-term X-ray variability characteristics of the narrow-line Seyfert 1 galaxy RE J1034+396. We use data obtained from the AstroSat satellite along with light curves obtained ...
H.E.S.S. discovery of very high energy γ-ray emission from PKS 0625−354
(Oxford Univ Press, 2018)
PKS 0625−354 (z = 0.055) was observed with the four High Energy Stereoscopic System (H.E.S.S.) telescopes in 2012 during 5.5 h. The source was detected above an energy threshold of 200 GeV at a significance level of 6.1σ. ...
Optical variability in IBL S5 0716+714 during the 2013-2015 outbursts
(IOP Publishing, 2018)
With an aim to explore optical variability at diverse timescales in BL Lac source S5 0716+714, it was observed for 46 nights during 2013 January 14 to 2015 June 01 when it underwent two major outbursts. The observations ...
Scaling of relativistic shear flows with the bulk Lorentz factor
(IOP Publishing, 2018)
We compare Particle-in-cell simulation results of relativistic electron–ion shear flows with different bulk Lorentz factors,
and discuss their implications for spine-sheath models of blazar versus gamma-ray burst (GRB) ...
Possible accretion disk origin of the emission variability of a blazar jet
(IOP Publishing, 2018)
We analyze X-ray light curves of the blazar Mrk 421 obtained from the Soft X-ray Imaging Telescope (SXT) and the Large Area X-ray Proportional Counter (LAXPC) instrument on board the Indian space telescope AstroSat and ...
Leptonic and hadronic modeling of Fermi-LAT hard spectrum quasars and predictions for high-energy polarization
(IOP Publishing, 2018)
We present the results of a study of the time-averaged spectral energy distributions (SEDs) of eight flat spectrum
radio quasars (FSRQs) present in the second catalog of high energy sources detected beyond 50 GeV by the ...
Lorentz invariance violation effects on gamma-gamma absorption and compton scattering
(IOP Publishing, 2018)
In this paper, we consider the impact of the Lorentz invariance violation (LIV) on the γ − γ opacity of the universe to very high energy (VHE) gamma-rays, compared to the effect of local underdensities (voids) of the ...