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Discovery of the Binary Pulsar PSR B1259-63 in Very-High-Energy Gamma Rays around Periastron with H.E.S.S

We report the discovery of very-high-energy (VHE) gamma-ray emission of the binary system PSR B1259-63/SS 2883 of a radio pulsar orbiting a massive, luminous Be star in a highly eccentric orbit. The observations around the 2004 periastron…

Astrophysics · Physics 2009-11-11 F. Aharonian

The TeV binary HESS J0632+057 in the low and high X-ray state

We report on a 40ks Chandra observation of the TeV emitting high mass X-ray binary HESS J0632+057 performed in February 2011 during a high-state of X-ray and TeV activity. We have used the ACIS-S camera in Continuos Clocking mode to search…

Astrophysics of Galaxies · Physics 2015-05-28 Nanda Rea , Diego F. Torres

Diagnosing Interstellar Magnetic Turbulence with TeV Pulsar Halos

Interstellar magnetic field is essential in various astrophysical phenomena and processes. Pulsar halos are a recently discovered class of TeV gamma-ray sources formed by escaping electrons/positrons from pulsars. The morphology of the halo…

High Energy Astrophysical Phenomena · Physics 2026-01-23 Chao-Ming Li , Ruo-Yu Liu , Huirong Yan

Detection of very-high-energy gamma-ray emission from the vicinity of PSR B1706-44 with H.E.S.S

The energetic pulsar PSR B1706-44 and the adjacent supernova remnant (SNR) candidate G 343.1-2.3 were observed by H.E.S.S. during a dedicated observational campaign in 2007. A new source of very-high-energy (VHE; E > 100 GeV) gamma-ray…

High Energy Astrophysical Phenomena · Physics 2019-08-14 S. Hoppe , E. de Oña-Wilhemi , B. Khélifi , R. C. G. Chaves , O. C. de Jager , C. Stegmann , R. Terrier

Detailed Analysis of the TeV {\gamma}-Ray Sources 3HWC J1928+178, 3HWC J1930+188, and the New Source HAWC J1932+192

The latest High Altitude Water Cherenkov (HAWC) point-like source catalog up to 56 TeV reported the detection of two sources in the region of the Galactic plane at galactic longitude 52\deg < l < 55\deg, 3HWC J1930+188 and 3HWC J1928+178.…

High Energy Astrophysical Phenomena · Physics 2023-03-01 A. Albert , R. Alfaro , C. Alvarez , J. C. Arteaga-Velázquez , D. Avila Rojas , H. A. Ayala Solares , R. Babu , E. Belmont-Moreno , C. Brisbois , K. S. Caballero-Mora , T. Capistrń , A. Carramiñana , S. Casanova , O. Chaparro-Amaro , U. Cotti , J. Cotzomi , S. CoutiñodeLeón , E. De la Fuente , C. de León , R. Diaz Hernandez , J. C. Díaz-Vélez , B. L. Dingus , M. A. DuVernois , M. Durocher , K. Engel , C. Espinoza , K. L. Fan , M. Fernández Alonso , N. Fraija , J. A. García-González , F. Garfias , H. Goksu , M. M. González , J. A. Goodman , J. P. Harding , S. Hernandez , J. Hinton , B. Hona , D. Huang , F. Hueyotl-Zahuantitla , P. Hüntemeyer , A. Iriarte , A. Jardin-Blicq , V. Joshi , S. Kaufmann , D. Kieda , W. H. Lee , H. León Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , R. López-Coto , K. Malone , V. Marandon , O. Martinez , J. Martínez-Castro , J. A. Matthews , P. Miranda-Romagnoli , J. A. Morales-Soto , E. Moreno , M. Mostafá , A. Nayerhoda , L. Nellen , M. Newbold , M. U. Nisa , R. Noriega-Papaqui , L. Olivera-Nieto , N. Omodei , A. Peisker , Y. Pérez Araujo , E. G. Pérez-Pérez , C. D. Rho , D. Rosa-González , E. Ruiz-Velasco , H. Salazar , D. Salazar-Gallegos , F. Salesa Greus , A. Sandoval , M. Schneider , J. Serna-Franco , A. J. Smith , Y. Son , R. W. Springer , O. Tibolla , K. Tollefson , I. Torres , R. Torres-Escobedo , R. Turner , F. Ureña-Mena , L. Villaseñor , X. Wang , F. Werner , E. Willox , H. Zhou

Diffuse TeV Gamma-Ray Emission in the H.E.S.S. Galactic Plane Survey

Diffuse gamma-ray emission has long been established as the most prominent feature in the GeV sky. Although the imaging atmospheric Cherenkov technique has been successful in revealing a large population of discrete TeV gamma-ray sources, a…

High Energy Astrophysical Phenomena · Physics 2019-08-15 K. Egberts , F. Brun , S. Casanova , W. Hofmann , M. de Naurois , O. Reimer , Q. Weitzel , Y. Fukui

Discovery of a Pulsar Candidate Associated with the TeV Gamma-ray Source HESS J1813-178

We present a Chandra X-ray observation of G12.82-0.02, a shell-like radio supernova remnant coincident with the TeV gamma-ray source HESS J1813-178. We resolve the X-ray emission from the co-located ASCA source into a compact object…

Astrophysics · Physics 2008-11-26 E. V. Gotthelf , D. J. Helfand

The H.E.S.S. Galactic Plane Survey - maps, source catalog and source population

The H.E.S.S. Galactic Plane Survey (HGPS), the first comprehensive survey of the inner Galaxy at TeV energies, has led to the discovery of an unexpectedly large and diverse population of over 60 sources of TeV gamma rays within its current…

High Energy Astrophysical Phenomena · Physics 2019-08-14 S. Carrigan , F. Brun , R. C. G. Chaves , C. Deil , A. Donath , H. Gast , V. Marandon , M. Renaud

An Enigmatic PeVatron in an Area around HII Region G35.6$-$0.5

Identifying Galactic PeVatrons (PeV particle accelerators) from the ultra-high-energy (UHE, >100 TeV) $\gamma$-ray sources plays a crucial role in revealing the origin of Galactic cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested…

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Features of the gamma-ray pulsar halo HESS J1831$-$098

Gamma-ray pulsar halos are ideal indicators of cosmic-ray propagation in localized regions of the Galaxy and electron injection from pulsar wind nebulae. HESS~J1831$-$098 is a candidate pulsar halo observed by both H.E.S.S. and HAWC…

High Energy Astrophysical Phenomena · Physics 2022-12-28 Kun Fang , Shao-Qiang Xi , Li-Zhuo Bao , Xiao-Jun Bi , En-Sheng Chen

The environment of TeV halo progenitors

TeV haloes are extended sources of very-high-energy gamma rays found around some middle-aged pulsars. The emission spanning several tens of parsecs suggests an efficient confinement of the ultra-relativistic lepton pairs produced by pulsars…

High Energy Astrophysical Phenomena · Physics 2026-02-11 Lioni-Moana Bourguinat , Carmelo Evoli , Pierrick Martin , Sarah Recchia

A study of the interstellar medium towards the unidentified dark TeV $\gamma$-ray sources HESS J1614-518 and HESS J1616-508

HESS J1614$-$518 and HESS J1616$-$508 are two tera-electron volt (TeV) $\gamma$-ray sources that are not firmly associated with any known counterparts at other wavelengths. We investigate the distribution of interstellar medium towards the…

High Energy Astrophysical Phenomena · Physics 2017-12-20 J. C. Lau , G. Rowell , F. Voisin , C. Braiding , M. Burton , Y. Fukui , S. Pointon , M. Ashley , C. Jordan , A. Walsh

GeV emission in the region of HESS J1809-193 and HESS J1813-178: is HESS J1809-193 a proton pevatron?

HESS J1809-193 is an unidentified TeV source discovered by the High Energy Stereoscopic System and originally classified as a pulsar wind nebula (PWN) candidate associated with the pulsar PSR J1809-1917. However, a recent study of deep…

High Energy Astrophysical Phenomena · Physics 2018-06-06 Miguel Araya

Observations of TeV binary systems with the H.E.S.S. telescope

Recent observations of binary systems obtained with the H.E.S.S. telescopes are providing crucial information on the physics of relativistic outflows and the engines powering them. We report here on new H.E.S.S. results on HESS J0632+057,…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Pol Bordas , Hélène Laffon , Mathieu de Naurois , Stefan Ohm , Emma de Oña Wilhelmi , Iurii Sushch , Francesca Volpe , Víctor Zabalza

Prospects of observing pulsed radiation from gamma-ray pulsars with H.E.S.S

Observations and theoretical studies have demonstrated that the pulsed spectra of all gamma-ray pulsars terminate at energies below a few hundred GeV. In most cases we expect this cutoff energy E_o to be around 10 GeV. Only with next…

Astrophysics · Physics 2009-10-31 O. C. de Jager , A. Konopelko , B. C. Raubenheimer , B. Visser

Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1913+1011 with H.E.S.S

The H.E.S.S. experiment, an array of four Imaging Atmospheric Cherenkov Telescopes with high sensitivity and large field-of-view, has been used to search for emitters of very-high-energy (VHE, >100 GeV) gamma-rays along the Galactic plane,…

Astrophysics · Physics 2015-05-13 HESS Collaboration , F. Aharonian

Revisiting the Chandra Observation on the Region of PSR J1809-1917: Indication of an X-ray Halo and Implication for the Origin of HESS J1809-193

HESS J1809-193 is an extended TeV $\gamma$-ray source and the origin of its $\gamma$-ray emission remains ambiguous. Pulsar wind nebula (PWN) of PSR J1809-1917 laying inside the extended $\gamma$-ray emission is a possible candidate.…

High Energy Astrophysical Phenomena · Physics 2023-06-07 Chao-Ming Li , Chong Ge , Ruo-Yu Liu

Very-High-Energy Emission From Pulsars

Air-Cherenkov telescopes have detected pulsations at energies above 50 GeV from a growing number of Fermi pulsars. These include the Crab, Vela, PSR B1706-44 and Geminga, with the first two having pulsed detections above 1 TeV. In some…

High Energy Astrophysical Phenomena · Physics 2022-01-05 Alice K. Harding , Christo Venter , Constantinos Kalapotharakos

Energy Dependent Morphology in the PWN candidate HESS J1825-137

Observations with H.E.S.S. revealed a new source of very high-energy (VHE) gamma-rays above 100 GeV - HESS J1825-137 - extending mainly to the south of the energetic pulsar PSR B1823-13. A detailed spectral and morphological analysis of…

Astrophysics · Physics 2012-08-27 S Collaboration , S. Funk , J. A. Hinton , O. C. deJager

Discovery of Extended X-Ray emission from the unidentified TeV source HESS J1614-518 using the Suzaku Satellite

We report the Suzaku results of HESS J1614-518, which is the brightest extended TeV gamma-ray source discovered in the Galactic plane survey conducted using the H.E.S.S. telescope. We discovered three X-ray objects in the field of view of…

Astrophysics · Physics 2017-01-18 Hironori Matsumoto , Hideki Uchiyama , Makoto Sawada , Takeshi G. Tsuru , Katsuji Koyama , Hideaki Katagiri , Ryo Yamazaki , Aya Bamba , Kazunori Kohri , Koji Mori , Yasunobu Uchiyama