924 citations · 39.2k across the 592 of their papers we have counts for
20 papers · 1 filter
H.E.S.S. observations of the supernova remnant RX J0852.0-4622: shell-type morphology and spectrum of a widely extended VHE gamma-ray source
HESS Collaboration, F. A. Aharonian
The shell-type supernova remnant RX J0852.0-4622 was observed with the High Energy Stereoscopic System (H.E.S.S.) of Atmospheric Cherenkov Telescopes between December 2004 and May…
Analytical solutions for energy spectra of electrons accelerated by nonrelativistic shock-waves in shell type supernova remnants
V. N. Zirakashvili, F. Aharonian
%context {Recent observations of hard X-rays and very high energy gamma-rays from a number of young shell type supernova remnants indicate the importance of detailed quantitative s…
Fast variability of TeV gamma-rays from the radio galaxy M 87
HESS Collaboration, F. A. Aharonian
The detection of fast variations of the TeV (10^12 eV) gamma-ray flux, on time-scales of days, from the nearby radio galaxy M 87 is reported. These variations are ~10 times faster…
Primary particle acceleration above 100 TeV in the shell-type Supernova Remnant RX J1713.7-3946 with deep H.E.S.S. observations
The HESS Collaboration, F. Aharonian
We present deep H.E.S.S. observations of the supernova remnant (SNR) RX J1713.7-3946. Combining data of three years - from 2003 to 2005 - we obtain significantly increased statisti…
Exploring Broadband GRB Behavior During gamma-ray Emission
S. A. Yost, H. F. Swan, E. S. Rykoff +44
The robotic ROTSE-III telescope network detected prompt optical emission contemporaneous with the gamma-ray emission of Swift events GRB051109A and GRB051111. Both datasets have co…
Gamma ray signatures of ultra high energy cosmic ray accelerators: electromagnetic cascade versus synchrotron radiation of secondary electrons
Stefano Gabici, Felix A. Aharonian
We discuss the possibility of observing ultra high energy cosmic ray sources inhigh energy gamma rays. Protons propagating away from their accelerators produce secondary electrons…
Gamma rays from molecular clouds
Stefano Gabici, Felix Aharonian, Pasquale Blasi
It is believed that the observed diffuse gamma ray emission from the galactic plane is the result of interactions between cosmic rays and the interstellar gas. Such emission can be…
H.E.S.S. observations of the Galactic Center region and their possible dark matter interpretation
H. E. S. S. collaboration, :, F. A. Aharonian
The detection of gamma-rays from the source HESS J1745-290 in the Galactic Center (GC) region with the H.E.S.S. array of Cherenkov telescopes in 2004 is presented. After subtractio…
Nucleonic gamma-ray production in Pulsar Wind Nebulae
D. Horns, F. Aharonian, A. I. D. Hoffmann +1
Observations of the inner radian of the Galactic disk at very high energy (VHE) gamma-rays have revealed at least 16 new sources. Besides shell type super-nova remnants, pulsar win…
Inverse Compton Scenarios for the TeV Gamma-Ray Emission of the Galactic Centre
J. A. Hinton, F. A. Aharonian
The intense Compton cooling of ultra-relativistic electrons in the Klein-Nishina regime in radiation dominated environments, such as that found in the Galactic Centre, may result i…
3.9 day orbital modulation in the TeV gamma-ray flux and spectrum from the X-ray binary LS 5039
The H. E. S. S. Collaboration, :, F. A. Aharonian
New observations of LS 5039, a High Mass X-ray Binary comprising a massive star and compact object, were carried out with the High Energy Stereoscopic System of Cherenkov Telescope…
Discovery of the two wings of the Kookaburra complex in VHE gamma -rays with H.E.S.S
The H. E. S. S. Collaboration, :, F. A. Aharonian
Aims. Search for Very High Energy gamma-ray emission in the Kookaburra complex through observations with the H.E.S.S. array. Methods. Stereoscopic imaging of Cherenkov light emissi…
Energy spectra of gamma-rays, electrons and neutrinos produced at proton-proton interactions in the very high energy regime
S. R. Kelner, F. A. Aharonian, V. V. Bugayov
We present new parametrisations of energy spectra of secondary particles, -mesons, gamma-rays, electrons and neutrinos, produced in inelastic proton-proton collisions. The simpl…
Radio to TeV radiation initiated by termination of hadronic jets from microquasars in the ISM
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars (MQs) are potential candidates to produce a non-negligible fraction of the observed galactic cosmic rays. The protons accelerated at the jet termination shock interact…
Microquasar hadronic jets at very high-energy gamma-rays
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars (MQs) present emission over the whole spectrum, from radio wavelengths to gamma-rays. The microquasar spectral energy distribution is very complex, being a signature o…
Off-axis emission from relativistic plasma flows
E. V. Derishev, F. A. Aharonian, Vl. V. Kocharovsky
We show that there is no universal law describing how the spectra and luminosity of synchrotron and inverse Compton radiation from relativistic jets change with increasing observat…
Absorption of Nuclear Gamma-rays on the Starlight Radiation in FR I Sources: the Case of Centaurus A
L. Stawarz, F. Aharonian, S. Wagner +1
Several BL Lac objects are confirmed sources of variable and strongly Doppler-boosted TeV emission produced in the nuclear portions of their relativistic jets. It is more than prob…
TeV lightcurve of PSR B1259-63/SS2883
Dmitry Khangulyan, Slavomir Hnatic, Felix Aharonian +1
The inverse Compton scattering of ultrarelativistic electrons accelerated at the pulsar wind termination shock is believed to be responsible for TeV gamma-ray signal recently repor…
Dynamics and High Energy Emission of the Flaring HST-1 Knot in the M 87 Jet
L. Stawarz, F. Aharonian, J. Kataoka +3
Stimulated by recent observations of a radio-to-X-ray synchrotron flare from HST-1, the innermost knot of the M 87 jet, as well as by a detection of a very high energy gamma-ray em…
The Anomalous Early Afterglow of GRB 050801
E. S. Rykoff, V. Mangano, S. A. Yost +24
The ROTSE-IIIc telescope at the H.E.S.S. site, Namibia, obtained the earliest detection of optical emission from a Gamma-Ray Burst (GRB), beginning only 21.8 s from the onset of Sw…