Showing 2016 · astro-ph.HEShow all

30 papers · 2 filters

astro-ph.HE2016★ 38 cited

Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113

H. E. S. S. Collaboration, :, H. Abdalla +332

The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monosc…

astro-ph.HE2016★ 195 cited

Search for annihilating dark matter in the Sun with 3 years of IceCube data

IceCube Collaboration, M. G. Aartsen, M. Ackermann +301

We present results from an analysis looking for dark matter annihilation in the Sun with the IceCube neutrino telescope. Gravitationally trapped dark matter in the Sun's core can a…

astro-ph.HE2016★ 11 cited

First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. observations of FRB 150418

H. E. S. S. Collaboration, :, H. Abdalla +265

Aims: Following the detection of the fast radio burst FRB150418 by the SUPERB project at the Parkes radio telescope, we aim to search for very-high energy gamma-ray afterglow emiss…

astro-ph.HE2016★ 270 cited

The contribution of Fermi-2LAC blazars to the diffuse TeV-PeV neutrino flux

IceCube Collaboration, M. G. Aartsen, K. Abraham +319

The recent discovery of a diffuse cosmic neutrino flux extending up to PeV energies raises the question of which astrophysical sources generate this signal. One class of extragalac…

astro-ph.HE2016★ 59 cited

Deeper H.E.S.S. observations of Vela Junior (RX J0852.04622): Morphology studies and resolved spectroscopy

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +260

Aims. We study gamma-ray emission from the shell-type supernova remnant (SNR) RX J0852.04622 to better characterize its spectral properties and its distribution over the SNR. Me…

astro-ph.HE2016★ 18 cited

Multi-wavelength observations of IGR J17544-2619 from quiescence to outburst

E. Bozzo, V. Bhalerao, P. Pradhan +12

In this paper we report on a long multi-wavelength observational campaign of the supergiant fast X-ray transient prototype IGR J17544-2619. A 150 ks-long observation was carried ou…

astro-ph.HE2016★ 50 cited

Characterizing the gamma-ray long-term variability of PKS 2155-304 with H.E.S.S. and Fermi-LAT

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +244

Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the v…

astro-ph.HE2016★ 6 cited

The Nature and Origin of Ultra-High Energy Cosmic Ray Particles

Peter L. Biermann, Laurentiu I. Caramete, Federico Fraschetti +9

We outline two concepts to explain Ultra High Energy Cosmic Rays (UHECRs), one based on radio galaxies and their relativistic jets and terminal hot spots, and one based on relativi…

astro-ph.HE2016★ 50 cited

The second closest gamma-ray burst: sub-luminous GRB 111005A with no supernova in a super-solar metallicity environment

Michał J. Michałowski, Dong Xu, Jamie Stevens +17

We report the detection of the radio afterglow of a long gamma-ray burst (GRB) 111005A at 5-345 GHz, including the very long baseline interferometry observations with the positiona…

astro-ph.HE2016★ 57 cited

H.E.S.S. limits on line-like dark matter signatures in the 100 GeV to 2 TeV energy range close to the Galactic Centre

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +246

A search for dark matter line-like signals was performed in the vicinity of the Galactic Centre by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likeliho…

astro-ph.HE2016★ 46 cited

The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +253

The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology r…

astro-ph.HE2016★ 116 cited

H.E.S.S. observations of RX J1713.7-3946 with improved angular and spectral resolution; evidence for gamma-ray emission extending beyond the X-ray emitting shell

H. E. S. S. Collaboration, :, H. Abdalla +252

Supernova remnants exhibit shock fronts (shells) that can accelerate charged particles up to very high energies. In the past decade, measurements of a handful of shell-type superno…

astro-ph.HE2016★ 323 cited

All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data

IceCube Collaboration, M. G. Aartsen, K. Abraham +306

Since the recent detection of an astrophysical flux of high energy neutrinos, the question of its origin has not yet fully been answered. Much of what is known about this flux come…

astro-ph.HE2016★ 39 cited

First search for dark matter annihilations in the Earth with the IceCube Detector

IceCube Collaboration, M. G. Aartsen, K. Abraham +312

We present the results of the first IceCube search for dark matter annihilation in the center of the Earth. Weakly Interacting Massive Particles (WIMPs), candidates for dark matter…

astro-ph.HE2016★ 6 cited

Flaring of Blazars from an Analytical, Time-dependent Model for Combined Synchrotron and Synchrotron Self-Compton Radiative Losses of Multiple Ultrarelativistic Electron Populations

Christian Röken, Florian Schuppan, Katharina Proksch +1

We present a fully analytical, time-dependent leptonic one-zone model that describes a simplified radiation process of multiple interacting ultrarelativistic electron populations,…

astro-ph.HE2016★ 314 cited

Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S

H. E. S. S. Collaboration, :, H. Abdallah +245

The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a searc…

astro-ph.HE2016★ 6 cited

Comic ray flux anisotropies caused by astrospheres

K. Scherer, R. D. Strauss, S. E. S. Ferreira +1

Huge astrospheres or stellar wind bubbles influence the propagation of cosmic rays at energies up to the TeV range and can act as small-scale sinks decreasing the cosmic ray flux.…

astro-ph.HE2016★ 17 cited

A search for very high-energy flares from the microquasars GRS 1915+105, Circinus X-1, and V4641 Sgr using contemporaneous H.E.S.S. and RXTE observations

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +244

Microquasars are potential -ray emitters. Indications of transient episodes of -ray emission were recently reported in at least two systems: Cyg X-1 and Cyg X-3. The identifi…

astro-ph.HE2016★ 514 cited

Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data

IceCube Collaboration, M. G. Aartsen, K. Abraham +309

The IceCube Collaboration has previously discovered a high-energy astrophysical neutrino flux using neutrino events with interaction vertices contained within the instrumented volu…

astro-ph.HE2016★ 7 cited

Search for Sources of High Energy Neutrons with Four Years of Data from the IceTop Detector

IceCube Collaboration, M. G. Aartsen, K. Abraham +308

IceTop is an air shower array located on the Antarctic ice sheet at the geographic South Pole. IceTop can detect an astrophysical flux of neutrons from Galactic sources as an exces…

astro-ph.HE2016★ 20 cited

Extended VHE gamma-ray emission towards SGR1806-20, LBV1806-20, and stellar cluster Cl*1806-20

H. Abdalla, A. Abramowski, F. Aharonian +241

Using the High Energy Spectroscopic System (H.E.S.S.) telescopes we have discovered a steady and extended very high-energy (VHE) gamma-ray source towards the luminous blue variable…

astro-ph.HE2016★ 31 cited

Lowering IceCube's Energy Threshold for Point Source Searches in the Southern Sky

IceCube Collaboration, M. G. Aartsen, K. Abraham +317

Observation of a point source of astrophysical neutrinos would be a "smoking gun" signature of a cosmic-ray accelerator. While IceCube has recently discovered a diffuse flux of ast…

astro-ph.HE2016★ 62 cited

All-flavour Search for Neutrinos from Dark Matter Annihilations in the Milky Way with IceCube/DeepCore

IceCube collaboration, M. G. Aartsen, K. Abraham +319

We present the first IceCube search for a signal of dark matter annihilations in the Milky Way using all-flavour neutrino-induced particle cascades. The analysis focuses on the Dee…

astro-ph.HE2016★ 156 cited

A large light-mass component of cosmic rays at 10^{17} - 10^{17.5} eV from radio observations

S. Buitink, A. Corstanje, H. Falcke +101

Cosmic rays are the highest energy particles found in nature. Measurements of the mass composition of cosmic rays between 10^{17} eV and 10^{18} eV are essential to understand whet…