Related papers: Observation of Galactic Gamma-ray Sources with VER…

The challenge of identifying INTEGRAL sources on the Galactic plane

The International Gamma-ray Astrophysics Laboratory (INTEGRAL) has been surveying the sky above 20 keV since its launch in 2002 providing new insights into the nature of the sources that populate our Universe at soft gamma-ray energies. The…

High Energy Astrophysical Phenomena · Physics 2024-02-26 Raffaella Landi , Loredana Bassani , Gabriele Bruni , Manuela Molina , Nicola Masetti , Angela Malizia , Mariateresa Fiocchi , Angela Bazzano , Pietro Ubertini

HESS VHE Gamma-Ray Sources Without Identified Counterparts

The detection of gamma rays in the very-high-energy (VHE) energy range (100 GeV--100 TeV) provides a direct view of the parent population of ultra-relativistic particles found in astrophysical sources. For this reason, VHE gamma rays are…

Astrophysics · Physics 2009-11-13 HESS Collaboration , F. Aharonian

Gamma-rays from Pulsar Wind Nebulae in Starburst galaxies (HEAD 2010)

Recently, two nearby prominent starburst galaxies, M82 and NGC253, have been detected as point-like sources with gamma-ray telescopes at TeV energies [1] [2]. It has been claimed that these detections show that the cosmic ray intensity in…

High Energy Astrophysical Phenomena · Physics 2010-10-13 O. Tibolla , K. Mannheim , D. Elsässer

Broadband Observations of the Transient X-ray Pulsar SAX J2103.5+4545

We investigated the optical, X-ray, and gamma-ray variability of the pulsar SAX J2103.5+4545. Our timing and spectral analyses of the X-ray and gamma-ray emissions from the source using RXTE and INTEGRAL data show that the shape of its…

Astrophysics · Physics 2009-11-10 E. V. Filippova , A. A. Lutovinov , P. E. Shtykovsky , M. G. Revnivtsev , R. A. Burenin , V. A. Aref'ev , M. N. Pavlinsky , R. A. Sunyaev

VERITAS Observations of the Arrival Directions of the Highest Energy Cosmic Rays

The recent discovery by the Pierre Auger collaboration of anisotropy in the arrival directions of the highest energy cosmic rays, correlated with the positions of nearby active galactic nuclei, encourages the search for counterpart TeV…

Astrophysics · Physics 2019-08-13 J. Holder

Gamma rays from compact binary system

Some of the very high energy (VHE) gamma-ray sources detected with the modern generation of Cherenkov telescopes have been identified with previously known X-ray binary systems. These detections demonstrate the richness of non-thermal…

Astrophysics · Physics 2009-11-13 Josep M. Paredes

Chandra X-ray Observations of the Two Brightest Unidentified High Galactic Latitude Fermi-LAT gamma-ray Sources

We present Chandra ACIS-I X-ray observations of 0FGL J1311.9-3419 and 0FGL J1653.4-0200, the two brightest high Galactic latitude (|b|>10 deg) gamma-ray sources from the 3 month Fermi-LAT bright source list that are still unidentified. Both…

High Energy Astrophysical Phenomena · Physics 2015-06-05 C. C. Cheung , D. Donato , N. Gehrels , K. V. Sokolovsky , M. Giroletti

Candidate counterparts to the soft gamma-ray flare in the direction of LS I +61303

Context. A short duration burst reminiscent of a soft gamma-ray repeater/anomalous X-ray pulsar behaviour was detected in the direction of LS I +61 303 by the Swift satellite. While the association with this well known gamma-ray binary is…

High Energy Astrophysical Phenomena · Physics 2009-11-13 A. J. Munoz-Arjonilla , J. Marti , J. A. Combi , P. Luque-Escamilla , J. R. Sanchez-Sutil , V. Zabalza , J. M. Paredes

Discovery of Variability in the Very High Energy Gamma-Ray Emission of 1ES 1218+304 with VERITAS

We present results from an intensive VERITAS monitoring campaign of the high-frequency peaked BL Lac object 1ES 1218+304 in 2008/2009. Although 1ES 1218+304 was detected previously by MAGIC and VERITAS at a persistent level of ~6% of the…

High Energy Astrophysical Phenomena · Physics 2010-01-18 The VERITAS Collaboration , V. A. Acciari , E. Aliu , M. Beilicke , W. Benbow , D. Boltuch , M. Böttcher , S. M. Bradbury , V. Bugaev , K. Byrum , A. Cesarini , L. Ciupik , P. Cogan , W. Cui , R. Dickherber , C. Duke , A. Falcone , J. P. Finley , G. Finnegan , L. Fortson , A. Furniss , N. Galante , D. Gall , K. Gibbs , R. Guenette , G. H. Gillanders , S. Godambe , J. Grube , D. Hanna , C. M. Hui , T. B. Humensky , A. Imran , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , S. McArthur , A. McCann , P. Moriarty , T. Nagai , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , A. Pichel , M. Pohl , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , M. Schroedter , G. H. Sembroski , A. W. Smith , D. Steele , S. P. Swordy , M. Theiling , S. Thibadeau , V. V. Vassiliev , S. Vincent , S. P. Wakely , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams

High Energy Astrophysics

The development of the atmospheric Cherenkov imaging technique has led to significant advances in gamma-ray detection sensitivity in the energy range from 200 GeV to 50 TeV. The Whipple Observatory 10m reflector has detected the first…

Astrophysics · Physics 2007-05-23 T. C. Weekes

HESS J1507-622: an unique unidentified source off the Galactic Plane

Galactic very high energy (VHE, > 100 GeV) gamma ray sources in the inner Galaxy H.E.S.S. survey tend to cluster within 1 degree in latitude around the Galactic plane. HESS J1507-622 instead is unique, since it is located at latitude of…

High Energy Astrophysical Phenomena · Physics 2019-08-14 O. Tibolla , W. Domainko , W. Hofmann , O. de Jager , S. Kaufmann , N. Komin , K. Kosack

VERITAS Search for VHE Gamma-ray Emission from Dwarf Spheroidal Galaxies

Indirect dark matter searches with ground-based gamma-ray observatories provide an alternative for identifying the particle nature of dark matter that is complementary to that of direct search or accelerator production experiments. We…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 The VERITAS Collaboration , V. A. Acciari , T. Arlen , T. Aune , M. Beilicke , W. Benbow , D. Boltuch , S. M. Bradbury , J. H. Buckley , V. Bugaev , K. Byrum , A. Cannon , A. Cesarini , J. L. Christiansen , L. Ciupik , W. Cui , R. Dickherber , C. Duke , J. P. Finley , G. Finnegan , A. Furniss , N. Galante , S. Godambe , J. Grube , R. Guenette , G. Gyuk , D. Hanna , J. Holder , C. M. Hui , T. B. Humensky , A. Imran , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , A. Konopelko , H. Krawczynski , F. Krennrich , G. Maier , S. McArthur , A. McCann , M. McCutcheon , P. Moriarty , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , M. Pohl , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , M. Schroedter , G. H. Sembroski , G. Demet Senturk , A. W. Smith , D. Steele , S. P. Swordy , G. Tešić , M. Theiling , S. Thibadeau , A. Varlotta , V. V. Vassiliev , S. Vincent , R. G. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , S. Wissel , M. D. Wood , B. Zitzer

Blazar Discoveries with VERITAS

Blazars are among the most energetic and violent objects in the universe. By observing blazars at very high energies (VHE, E > 100 GeV) we can better understand blazar emission mechanisms, jet structure, black hole accretion and the…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-13 J. S. Perkins

Multiwavelength observations of a TeV-Flare from W Comae

We report results from an intensive multiwavelength campaign on the intermediate-frequency-peaked BL Lacertae object W Com (z=0.102) during a strong outburst of very high energy gamma-ray emission in June 2008. The very high energy…

High Energy Astrophysical Phenomena · Physics 2016-03-23 VERITAS collaboration , V. A. Acciari , E. Aliu , T. Aune , M. Beilicke , W. Benbow , M. Bottcher , D. Boltuch , J. H. Buckley , S. M. Bradbury , V. Bugaev , K. Byrum , A. Cannon , A. Cesarini , L. Ciupik , P. Cogan , W. Cui , R. Dickherber , C. Duke , A. Falcone , J. P. Finley , P. Fortin , L. Fortson , A. Furniss , N. Galante , D. Gall , K. Gibbs , G. H. Gillanders , J. Grube , R. Guenette , G. Gyuk , D. Hanna , J. Holder , C. M. Hui , T. B. Humensky , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , S. McArthur , A. McCann , M. McCutcheon , J. Millis , P. Moriarty , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , A. Pichel , M. Pohl , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , G. H. Sembroski , A. W. Smith , D. Steele , M. Theiling , S. Thibadeau , A. Varlotta , V. V. Vassiliev , S. Vincent , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , S. Wissel , M. Wood , The AGILE Team , : , E. Pian , S. Vercellone , I. Donnarumma , F. D'Ammando , A. Bulgarelli , A. W. Chen , A. Giuliani , F. Longo , L. Pacciani , G. Pucella , V. Vittorini , M. Tavani , A. Argan , G. Barbiellini , P. Caraveo , P. W. Cattaneo , V. Cocco , E. Costa , E. Del Monte , G. De Paris , G. Di Cocco , Y. Evangelista , M. Feroci , M. Fiorini , T. Froysland , M. Frutti , F. Fuschino , M. Galli , F. Gianotti , C. Labanti , I. Lapshov , F. Lazzarotto , P. Lipari , M. Marisaldi , M. Mastropietro , S. Mereghetti , E. Morelli , A. Morselli , A. Pellizzoni , F. Perotti , G. Piano , P. Picozza , M. Pilia , G. Porrovecchio , M. Prest , M. Rapisarda , A. Rappoldi , A. Rubini , S. Sabatini P. Soffitta , M. Trifoglio , A. Trois , E. Vallazza , A. Zambra , D. Zanello , C. Pittori , P. Santolamazza , F. Verrecchia , P. Giommi , S. Colafrancesco , L. Salotti , M. Villata , C. M. Raiteri , H. D. Aller , M. F. Aller , A. A. Arkharov , N. V. Efimova , V. M. Larionov , P. Leto , R. Ligustri , E. Lindfors , M. Pasanen , O. M. Kurtanidze , S. D. Tetradze , A. Lahteenmaki , M. Kotiranta , A. Cucchiara , P. Romano , R. Nesci , T. Pursimo , J. Heidt , E. Benitez , D. Hiriart , K. Nilsson , A. Berdyugin , R. Mujica , D. Dultzin , J. M. Lopez , M. Mommert , M. Sorcia , I. de la Calle Perez

Radio detections towards unidentified variable EGRET sources

Context. A considerable fraction of the gamma-ray sources discovered with the Energetic Gamma-Ray Experiment Telescope (EGRET) remain unidentified. The EGRET sources that have been properly identified are either pulsars or variable sources…

Astrophysics · Physics 2009-06-23 J. M. Paredes , J. Marti , C. H. Ishwara-Chandra , D. F. Torres , G. E. Romero , J. A. Combi , V. Bosch-Ramon , A. J. Munoz-Arjonilla , J. R. Sanchez-Sutil

VERITAS Observations Of M~31 (The Andromeda Galaxy)

Diffuse gamma rays are tracers of cosmic rays, providing information on their origin, interaction and diffusion through a galaxy. M 31 (the Andromeda Galaxy) is the closest spiral galaxy to the Milky Way (d = 780 kpc) and is very well…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Ralph Bird

The VERITAS Survey of the Cygnus Region of the Galactic Plane

The Cygnus region of the Galactic plane contains many known supernova remnants, pulsars, X-ray and GeV gamma-ray emitters which make it a prime candidate for a Very High Energy (VHE) gamma-ray survey in the Northern Hemisphere. The VERITAS…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Amanda Weinstein

Gamma Ray Astronomy with Magnetized Zevatrons

Nearby sources of cosmic rays up to a ZeV(=10^21 eV) could be observed with a multi-messenger approach including secondary gamma-rays and neutrinos. If cosmic rays above ~10^18 eV are produced in magnetized environments such as galaxy…

Astrophysics · Physics 2007-05-23 Eric Armengaud , Guenter Sigl , Francesco Miniati

Discovery and follow-up studies of the extended, off-plane, VHE gamma-ray source HESS J1507-622

Context: The detection of gamma-rays in the very-high-energy (VHE) range (100 GeV-100 TeV) offers the possibility of studying the parent population of ultrarelativistic particles found in astrophysical sources, so it is useful for…

High Energy Astrophysical Phenomena · Physics 2015-05-20 H. E. S. S. Collaboration , F. Acero , F. Aharonian , A. G. Akhperjanian , G. Anton , U. Barres de Almeida , A. R. Bazer-Bachi , Y. Becherini , B. Behera , K. Bernlöhr , A. Bochow , C. Boisson , J. Bolmont , V. Borrel , J. Brucker , F. Brun , P. Brun , R. Bühler , T. Bulik , I. Büsching , T. Boutelier , P. M. Chadwick , A. Charbonnier , R. C. G. Chaves , A. Cheesebrough , L. -M. Chounet , A. C. Clapson , G. Coignet , M. Dalton , M. K. Daniel , I. D. Davids , B. Degrange , C. Deil , H. J. Dickinson , A. Djannati-Ataï , W. Domainko , L. O'C. Drury , F. Dubois , G. Dubus , J. Dyks , M. Dyrda , K. Egberts , D. Emmanoulopoulos , P. Espigat , C. Farnier , F. Feinstein , A. Fiasson , A. Förster , G. Fontaine , M. Füssling , S. Gabici , Y. A. Gallant , L. Gérard , D. Gerbig , B. Giebels , J. F. Glicenstein , B. Glück16 , P. Goret , D. Göring , D. Hauser , M. Hauser , S. Heinz , G. Heinzelmann , G. Henri , G. Hermann , J. A. Hinton , A. Hoffmann , W. Hofmann , M. Holleran , S. Hoppe , D. Horns , A. Jacholkowska , O. C. de Jager , C. Jahn , I. Jung , K. Katarzyński , U. Katz , S. Kaufmann , M. Kerschhaggl , D. Khangulyan , B. Khélifi , D. Keogh , D. Klochkov , W. Kluźniak , T. Kneiske , Nu. Komin , K. Kosack , R. Kossakowski , G. Lamanna , J. -P. Lenain , T. Lohse , V. Marandon , O. Martineau-Huynh , A. Marcowith , J. Masbou , D. Maurin , T. J. L. McComb , M. C. Medina , J. Méhault , R. Moderski , E. Moulin , M. Naumann-Godo , M. de Naurois , D. Nedbal , D. Nekrassov , B. Nicholas , J. Niemiec , S. J. Nolan , S. Ohm , J-F. Olive , E. de Oña Wilhelmi , K. J. Orford , M. Ostrowski , M. Panter , M. Paz Arribas , G. Pedaletti , G. Pelletier , P. -O. Petrucci , S. Pita , G. Pühlhofer , M. Punch , A. Quirrenbach , B. C. Raubenheimer , M. Raue , S. M. Rayner , O. Reimer , M. Renaud , F. Rieger , J. Ripken , L. Rob , S. Rosier-Lees , G. Rowell , B. Rudak , C. B. Rulten , J. Ruppel , V. Sahakian , A. Santangelo , R. Schlickeiser , F. M. Schöck , U. Schwanke , S. Schwarzburg , S. Schwemmer , A. Shalchi , M. Sikora , J. L. Skilton , H. Sol , Ł. Stawarz , R. Steenkamp , C. Stegmann , F. Stinzing , G. Superina , A. Szostek , P. H. Tam , J. -P. Tavernet , R. Terrier , O. Tibolla , M. Tluczykont , C. van Eldik , G. Vasileiadis , C. Venter , L. Venter , J. P. Vialle , P. Vincent , M. Vivier , H. J. Völk , F. Volpe , S. J. Wagner , M. Ward , A. A. Zdziarski , A. Zech

Characterizing the VHE emission of LS I +61 303 using VERITAS observations

The TeV gamma-ray binary LS I +61 303, approximately 2 kpc from Earth, consists of a low mass compact object in an eccentric orbit around a massive Be star. LS I +61 303 exhibits modulated VHE gamma-ray emission around its 26.5 days orbit,…

High Energy Astrophysical Phenomena · Physics 2019-08-09 D. B. Kieda , the VERITAS Collaboration