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Blog Archives

April 9, 2018 by Lars Mohrmann

Systematic search for very-high-energy gamma-ray emission from bow shocks of runaway stars

Context. Runaway stars form bow shocks by ploughing through the interstellar medium at supersonic speeds and are promising sources of non-thermal emission of photons. One of these objects has been found to emit non-thermal…

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April 9, 2018 by Lars Mohrmann

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

The H.E.S.S. Collaboration has discovered a new very high energy (VHE, E > 0.1 TeV) γ-ray source, HESS J1741−302, located in the Galactic plane. Despite several attempts to constrain its nature, no plausible counterpart…

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April 9, 2018 by Lars Mohrmann

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

Context. 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-ray fluxes above the sensitivity limits…

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April 9, 2018 by Lars Mohrmann

The H.E.S.S. Galactic plane survey

We present the results of the most comprehensive survey of the Galactic plane in very high-energy (VHE) γ-rays, including a public release of Galactic sky maps, a catalog of VHE sources, and the discovery…

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April 9, 2018 by Lars Mohrmann

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

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

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April 9, 2018 by Lars Mohrmann

Population study of Galactic supernova remnants at very high γ-ray energies with H.E.S.S.

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 E ≈ 3 × 1015 eV. Our Milky Way…

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March 2, 2018 by Lars Mohrmann

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

Context. Recently, the high-energy (HE, 0.1–100 GeV) γ-ray emission from the object LMC P3 in the Large Magellanic Cloud (LMC) has been discovered to be modulated with a 10.3-day period, making it the first…

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February 20, 2018 by Lars Mohrmann

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

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.…

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November 22, 2017 by Lars Mohrmann

TeV Gamma-Ray Observations of the Binary Neutron Star Merger GW170817 with H.E.S.S.

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 been obtained starting only 5.3 hr after GW170817. The…

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October 16, 2017 by Lars Mohrmann

Multi-messenger Observations of a Binary Neutron Star Merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray…

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Browse other months

Recent sources

V4641 Sagittarii – the not-so-unremarkable microquasarDecember 1, 2025
The Vela Pulsar – the most Highly Energetic ClockNovember 1, 2023
HESS J1645−455 – A gem on the ring?October 1, 2023
The identity crisis of the blazar PKS 1510-089August 1, 2023
Cosmic Conspiracy Theories: Neutrinos and Gamma Rays from PKS 0735+178?July 1, 2023

Fields

Atmosphere black holes Blazar Cosmic rays Extragalactic Galactic Center galactic plane galactic source Gamma-ray binary gamma-rays microquasar neutrinos Nova pulsar

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Last sources of the month

V4641 Sagittarii – the not-so-unremarkable microquasarDecember 1, 2025
The Vela Pulsar – the most Highly Energetic ClockNovember 1, 2023
HESS J1645−455 – A gem on the ring?October 1, 2023

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