H.E.S.S. CollaborationH.E.S.S. Collaboration
  • The collaboration
    • H.E.S.S. Institutions
    • H.E.S.S. Organisation
    • H.E.S.S. Prize
    • Opportunities
  • Science
    • News
    • Publications
    • H.E.S.S. Data release
    • External Proposals
    • Visibility calculator
  • Sources of the month
  • Contact

Blog Archives

July 1, 2014 by H.E.S.S. Collaboration

Search for extended gammma-ray emission around AGN with H.E.S.S. and Fermi-LAT

Context: Very-high-energy (VHE; E>100 GeV) {\gamma}-ray emission from blazars inevitably gives rise to electron-positron pair production through the interaction of these {\gamma}-rays with the Extragalactic Background Light (EBL). Depending on the magnetic fields in…

Read more

July 1, 2014 by H.E.S.S. Collaboration

Long-term TeV and X-ray observations of the gamma-ray binary HESS J0632+057

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. Here we report on long-term observations of…

Read more

July 1, 2014 by H.E.S.S. Collaboration

The H.E.S.S. central data acquisition system

July 1, 2014 by H.E.S.S. Collaboration

H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray Flare

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…

Read more

July 1, 2013 by H.E.S.S. Collaboration

Search for Very-high-energy gamma-ray emission from Galactic globular clusters with H.E.S.S

Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV

July 1, 2013 by H.E.S.S. Collaboration

Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S

Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable…

Read more

July 1, 2013 by H.E.S.S. Collaboration

Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S

The extragalactic background light (EBL) is the diffuse radiation with the second highest energy density in the Universe after the cosmic microwave background. The aim of this study is the measurement of the imprint…

Read more

July 1, 2013 by H.E.S.S. Collaboration

Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum

Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of ALPs…

Read more

July 1, 2013 by H.E.S.S. Collaboration

Discovery of very high energy gamma-ray emission from the BL Lac object PKS 0301-243 with H.E.S.S

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 reports on the…

Read more

July 1, 2013 by H.E.S.S. Collaboration

H.E.S.S and Fermi-LAT discovery of gamma rays from the blazar 1ES 1312-423

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 degrees away from the radio galaxy.…

Read more

Posts pagination

Previous 1 … 9 10 11 … 23 Next
100/229
July 2025
M T W T F S S
 123456
78910111213
14151617181920
21222324252627
28293031  
« Nov    

Recent sources

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
Flares in the atmosphereJune 1, 2023

Fields

Atmosphere black holes Blazar Galactic Center galactic plane galactic source gamma-rays neutrinos pulsar

Contact

You can contact us for scientific queries and general informations using :
hess-ec@lsw.uni-heidelberg.de

Sources of the month

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
H.E.S.S. collaboration official website. Proudly Built By H.E.S.S. members.
(c) 2004-2025 by the H.E.S.S. collaboration

Last sources of the month

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

Internal

  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org
H.E.S.S. Collaboration
Manage Consent
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Manage options Manage services Manage {vendor_count} vendors Read more about these purposes
View preferences
{title} {title} {title}