924 citations · 39.2k across the 592 of their papers we have counts for
24 papers · 1 filter
Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057
VERITAS Collaboration, E. Aliu, S. Archambault +297
HESS J0632+057 is the only gamma-ray binary known so far whose position in the sky allows observations with ground-based observatories both in the northern and southern hemispheres…
Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum
H. E. S. S. Collaboration, A. Abramowski, F. Acero +211
Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising h…
H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray Flare
H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +217
Context. On March 4, 2013, the Fermi-LAT and AGILE reported a flare from the direction of the Crab Nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its qu…
Simple analytical approximations for treatment of inverse Compton scattering of relativistic electrons in the black-body radiation field
Dmitry Khangulyan, Felix A. Aharonian, Stanislav R. Kelner
The inverse Compton (IC) scattering of relativistic electrons is one of the major gamma-ray production mechanisms in different environments. Often the target photons for the IC sca…
HESS J1818-154, a new composite supernova remnant discovered in TeV gamma rays and X-rays
H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +217
Composite supernova remnants (SNRs) constitute a small subclass of the remnants of massive stellar explosions where non-thermal radiation is observed from both the expanding shell-…
Diffuse PeV neutrinos from EeV cosmic ray sources: semi-relativistic hypernova remnants in star-forming galaxies
Ruo-Yu Liu, Xiang-Yu Wang, Susumu Inoue +2
We argue that the excess of sub-PeV/PeV neutrinos recently reported by IceCube could plausibly originate through pion-production processes in the same sources responsible for cosmi…
Discovery of very high energy gamma-ray emission from the BL Lac object PKS 0301-243 with H.E.S.S
H. E. S. S. Collaboration, A. Abramowski, F. Acero +211
The active galactic nucleus PKS 0301-243 (z=0.266) is a high-synchrotron-peaked BL Lac object that is detected at high energies (HE, 100 MeV < E < 100 GeV) by Fermi/LAT. This paper…
The beaming pattern of External Compton Emission from relativistic outflows
S. R. Kelner, E. Lefa, F. M. Rieger +1
The beaming pattern of radiation emitted by a relativistically moving source like jets in microquasars, AGN and GRBs, is a key issue for understanding of acceleration and radiation…
Nonthermal radiation of young supernova remnants: the case of Cas A
V. N. Zirakashvili, F. A. Aharonian, R. Yang +2
The processes responsible for the broad-band radiation of the young supernova remnant Cas A are explored using a new code which is designed for a detailed treatment of the diffusiv…
CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013)
The CTA Consortium, :, O. Abril +1102
Compilation of CTA contributions to the proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), which took place in 2-9 July, 2013, in Rio de Janeiro, Brazil
Search for Very-high-energy gamma-ray emission from Galactic globular clusters with H.E.S.S
P. Eger, C. van Eldik
Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV<E<100 GeV) γ-ray radiation which could originate from the cumulative emission of the numerous milliseco…
H.E.S.S and Fermi-LAT discovery of gamma rays from the blazar 1ES 1312-423
H. E. S. S. Collaboration, A. Abramowski, F. Acero +214
A deep observation campaign carried out by the High Energy Stereoscopic System (H.E.S.S.) on Centaurus A enabled the discovery of gamma rays from the blazar 1ES 1312-423, two degre…
On the Jitter Radiation
Stanislav R. Kelner, Felix A. Aharonian, Dmitry Khangulyan
In a small scale turbulent medium, when the nonrelativistic Larmor radius exceeds the correlation length of the magnetic field, the magnetic bremsstrahlung…
Star-Jet Interactions and Gamma-Ray Outbursts from 3C454.3
D. V. Khangulyan, M. V. Barkov, V. Bosch-Ramon +2
We propose a model to explain the ultra-bright GeV gamma-ray flares observed from the blazar 3C454.3. The model is based on the concept of a relativistic jet interacting with compa…
Synchrotron-to-curvature transition regime of radiation of charged particles in a dipole magnetic field
A. Yu. Prosekin, S. R. Kelner, F. A. Aharonian
The details of trajectories of charged particles become increasingly important for proper understanding of processes of formation of radiation in strong and curved magnetic fields.…
H.E.S.S. discovery of VHE gamma-rays from the quasar PKS 1510-089
H. E. S. S. Collaboration, A. Abramowski, F. Acero +204
The quasar PKS 1510-089 (z=0.361) was observed with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes during high states in the optical and GeV bands, to search for ve…
Discovery of high and very high-energy emission from the BL Lac object SHBL J001355.9-185406
H. E. S. S. Collaboration, :, A. Abramowski +210
The detection of the high-frequency peaked BL Lac object (HBL) SHBL J001355.9-185406 (=0.095) at high (HE; 100 MeVE300 GeV) and very high-energy (VHE; )…
Probing Cosmic Rays in Nearby Giant Molecular Clouds with the Fermi Large Area Telescope
Rui-zhi Yang, Emma de Oña Wilhelmi, Felix Aharonian
We report the results of our study of the energy spectra and absolute fluxes of cosmic rays (CRs) in the Local Galaxy based on a five-year -ray observation with the Fermi Large…
Evidence for a second component in the high-energy core emission from Centaurus A?
N. Sahakyan, R. Yang, F. A. Aharonian +1
We report on an analysis of \fermi data from four year of observations of the nearby radio galaxy Centaurus A (Cen A). The increased photon statistics results in a detection of hig…
TeV Astronomy
Frank M. Rieger, Emma de Ona-Wilhelmi, Felix A. Aharonian
With the successful realization of the current-generation of ground-based detectors, TeV Astronomy has entered into a new era. We review recent advances in VHE astronomy, focusing…
Pathway to the Square Kilometre Array - The German White Paper -
F. Aharonian, T. G. Arshakian, B. Allen +69
The Square Kilometre Array (SKA) is the most ambitious radio telescope ever planned. With a collecting area of about a square kilometre, the SKA will be far superior in sensitivity…
H.E.S.S. Observations of the Binary System PSR B1259-63/LS 2883 around the 2010/2011 Periastron Passage
H. E. S. S. Collaboration, :, A. Abramowski +203
Aim. In this paper we present very high energy (VHE; E>100 GeV) data from the γ-ray binary system PSR B1259-63/LS 2883 taken around its periastron passage (15th of December 2010) w…
Search for Very-high-energy γ-ray emission from Galactic globular clusters with H.E.S.S
H. E. S. S. Collaboration, :, A. Abramowski +203
Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV<E<100 GeV) γ-ray radiation which could originate from the cumulative emission of the numerous milliseco…
Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
H. E. S. S. Collaboration, :, A. Abramowski +201
Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_γ> 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal…