P. Willmann

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…

H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud

H. E. S. S. Collaboration, :, A. Abramowski +224

G349.7+0.2 is a young Galactic supernova remnant (SNR) located at the distance of 11.5 kpc and observed across the entire electromagnetic spectrum from radio to high energy (HE) Ga…

Search for $I^^{3}$ -ray line signals from dark matter annihilations in the inner Galactic halo from ten years of observations with H.E.S.S

H. E. S. S. Collaboration, H. Abdallah, A. Abramowski +254

Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy $I^^{3}$ -rays. The central region of the Milky Way halo is one of t…

TeV Î³-ray observations of the young synchrotron-dominated SNRs G1.9+0.3 and G330.2+1.0 with H.E.S.S

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +217

The non-thermal nature of the X-ray emission from the shell-type supernova remnants (SNRs) G1.9+0.3 and G330.2+1.0 is an indication of intense particle acceleration in the shock fr…

Search for dark matter annihilation signatures in H.E.S.S. observations of Dwarf Spheroidal Galaxies

H. E. S. S. Collaboration, :, A. Abramowski +229

Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of non-thermal h…

astro-ph.GA2014

Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +217

About 40% of the observation time of the High Energy Stereoscopic System (H.E.S.S.) is dedicated to studying active galactic nuclei (AGN), with the aim of increasing the sample of…

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…

H.E.S.S. reveals a lack of TeV emission from the supernova remnant Puppis A

H. E. S. S. Collaboration, :, A. Abramowski +224

Puppis A is an interesting ~4 kyr-old supernova remnant (SNR) that shows strong evidence of interaction between the forward shock and a molecular cloud. It has been studied in deta…

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…

TeV gamma-ray observations of the binary neutron star merger GW170817 with H.E.S.S

H. E. S. S. Collaboration, :, H. Abdalla +250

We search for high-energy gamma-ray emission from the binary neutron star merger GW170817 with the H.E.S.S. Imaging Air Cherenkov Telescopes. The observations presented here have b…

Constraints on an Annihilation Signal from a Core of Constant Dark Matter Density around the Milky Way Center with H.E.S.S

HESS Collaboration, A. Abramowski, F. Aharonian +223

An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated ON/OFF observations of the Galactic center region with H.…

Acceleration of petaelectronvolt protons in the Galactic Centre

H. E. S. S. collaboration, :, A. Abramowski +229

Galactic cosmic rays reach energies of at least a few Peta-electronvolts (1 PeV = $1 0^{15}$ electron volts). This implies our Galaxy contains PeV accelerators (PeVatrons), bu…

HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +218

The results of follow-up observations of the TeV gamma-ray source HESSJ 1640-465 from 2004 to 2011 with the High Energy Stereoscopic System (H.E.S.S.) are reported in this work. Th…

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 ( $z$ =0.095) at high (HE; 100 MeV $<$ E $<$ 300 GeV) and very high-energy (VHE; $E > 100 GeV$ )…

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 $I^^{3}$ -ray emitters. Indications of transient episodes of $I^^{3}$ -ray emission were recently reported in at least two systems: Cyg X-1 and Cyg X-3. The identi…

Constraints on particle acceleration in SS433/W50 from MAGIC and H.E.S.S. observations

MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +408

The large jet kinetic power and non-thermal processes occurring in the microquasar SS 433 make this source a good candidate for a very high-energy (VHE) gamma-ray emitter. Gamma-ra…

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…

Contributions of the High Energy Stereoscopic System (H.E.S.S.) to the 35th International Cosmic Ray Conference (ICRC), Busan, Korea

H. E. S. S. Collaboration, :, H. Abdalla +256

Index of H.E.S.S. conference proceedings to the 35th ICRC, Busan, Korea

Detailed spectral and morphological analysis of the shell type SNR RCW 86

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +232

Aims: We aim for an understanding of the morphological and spectral properties of the supernova remnant RCW~86 and for insights into the production mechanism leading to the RCW~86…

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…

The $I^^{3}$ -ray spectrum of the core of Centaurus A as observed with H.E.S.S. and Fermi-LAT

H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +249

Centaurus A (Cen A) is the nearest radio galaxy discovered as a very-high-energy (VHE; 100 GeV-100 TeV) $I^^{3}$ -ray source by the High Energy Stereoscopic System (H.E.S.S.). It is a f…

Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations

The H. E. S. S. Collaboration, :, A. Abramowski +228

Previous observations with HESS have revealed the existence of an extended very-high-energy (VHE; E>100 GeV) gamma-ray source, HESS J1834-087, coincident with the SNR W41. The orig…

Search for Extended Î³-ray Emission around AGN with H.E.S.S. and Fermi-LAT

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +218

Context: Very-high-energy (VHE; E>100 GeV) Î³-ray emission from blazars inevitably gives rise to electron-positron pair production through the interaction of these Î³-rays with the…

Discovery of the hard spectrum VHE gamma-ray source HESS J1641-463

H. E. S. S. Collaboration, :, A. Abramowski +230

This letter reports the discovery of a remarkably hard spectrum source, HESS J1641-463, by the High Energy Stereoscopic System (H.E.S.S.) in the very-high energy (VHE) domain. HESS…

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…

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…

Deeper H.E.S.S. observations of Vela Junior (RX J0852.0 $-$ 4622): 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 J0852.0 $-$ 4622 to better characterize its spectral properties and its distribution over the SNR. Me…

The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey

H. E. S. S. Collaboration, :, H. Abdalla +255

The nine-year H.E.S.S. Galactic Plane Survey (HGPS) yielded the most uniform observation scan of the inner Milky Way in the TeV gamma-ray band to date. The sky maps and source cata…

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…

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…

A search for new supernova remnant shells in the Galactic plane with H.E.S.S

H. E. S. S. Collaboration, :, H. Abdalla +263

A search for new supernova remnants (SNRs) has been conducted using TeV gamma-ray data from the H.E.S.S. Galactic plane survey. As an identification criterion, shell morphologies t…

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…

Detection of variable VHE gamma-ray emission from the extra-galactic gamma-ray binary LMC P3

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

Context. Recently, the high-energy (HE, 0.1-100 GeV) $I^^{3}$ -ray emission from the object LMC P3 in the Large Magellanic Cloud (LMC) has been discovered to be modulated with a 10.3-da…

The 2012 flare of PG 1553+113 seen with H.E.S.S. and Fermi-LAT

A. Abramowski, F. Aharonian, F. Ait Benkhali +224

Very high energy (VHE, $E >$ 100 GeV) $I^^{3}$ -ray flaring activity of the high-frequency peaked BL Lac object \pg\ has been detected by the \hess\ telescopes. The flux of the source inc…

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-…

H.E.S.S. discovery of very high energy gamma-ray emission from PKS 0625-354

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

PKS 0625-354 (z=0.055) was observed with the four H.E.S.S. telescopes in 2012 during 5.5 hours. The source was detected above an energy threshold of 200 GeV at a significance level…

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…

Long-term monitoring of PKS 2155 $-$ 304 with ATOM and H.E.S.S.: investigation of optical/ $I^^{3}$ -ray correlations in different spectral states

A. Abramowski, F. Aharonian, F. Ait Benkhali +225

In this paper we report on the analysis of all the available optical and very high-energy $I^^{3}$ -ray ( $>$ 200 GeV) data for the BL Lac object PKS 2155 $-$ 304, collected simultaneously…

Diffuse Galactic gamma-ray emission with H.E.S.S

H. E. S. S. Collaboration, :, A. Abramowski +225

Diffuse $I^^{3}$ -ray emission is the most prominent observable signature of celestial cosmic-ray interactions at high energies. While already being investigated at GeV energies over se…

Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with H.E.S.S

H. E. S. S. Collaboration, :, H. Abdalla +256

The diffuse very high-energy (VHE, > 100 GeV) gamma-ray emission observed in the central 200 pc of the Milky Way by H.E.S.S. was found to follow the dense matter distribution in th…

Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +213

The long gamma-ray burst (GRB) 100621A, at the time the brightest X-ray transient ever detected by Swift-XRT in the $0.3 - 10$ keV range, has been observed with the H.E.S.S…

The exceptionally powerful TeV gamma-ray emitters in the Large Magellanic Cloud

H. E. S. S. Collaboration, :, A. Abramowski +226

The Large Magellanic Cloud, a satellite galaxy of the Milky Way, has been observed with the High Energy Stereoscopic System (H.E.S.S.) above an energy of 100 billion electron volts…

Population study of Galactic supernova remnants at very high $I^^{3}$ -ray energies with H.E.S.S.

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

Shell-type supernova remnants (SNRs) are considered prime candidates for the acceleration of Galactic cosmic rays (CRs) up to the knee of the CR spectrum at $\mathrm{E} \approx \ma…

Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856

H. E. S. S. Collaboration, :, A. Abramowski +230

Re-observations with the H.E.S.S. telescope array of the very-high-energy (VHE) source HESS J1018-589 A coincident with the Fermi-LAT $I^^{3}$ -ray binary 1FGL J1018.6-5856 have resulte…

Measurement of the EBL spectral energy distribution using the VHE gamma-ray spectra of H.E.S.S. blazars

H. E. S. S. Collaboration, :, H. Abdalla +256

Very high-energy gamma-rays (VHE, E>100 GeV) propagating over cosmological distances can interact with the low-energy photons of the extragalactic background light (EBL) and produc…

Discovery of the VHE gamma-ray source HESS J1832-093 in the vicinity of SNR G22.7-0.2

H. E. S. S. Collaboration, :, A. Abramowski +218

The region around the supernova remnant (SNR) W41 contains several TeV sources and has prompted the H.E.S.S. Collaboration to perform deep observations of this field of view. This…

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…

HESS J1741-302: a hidden accelerator in the Galactic plane

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

The H.E.S.S. collaboration has discovered a new very high energy (VHE, E $>$ 0.1 TeV) $I^^{3}$ -ray source, HESS J1741-302, located in the Galactic plane. Despite several attempts to co…

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…