Related papers: VERITAS Observations of the gamma-Ray Binary LS I …

Observations of VHE gamma-ray binaries with the MAGIC Telescopes

Several binary systems, composed of a star and a compact object, have been detected in the GeV-TeV range. Several systems have been observed but only a handful of sources have shown emission at those energies. Here, we present the…

High Energy Astrophysical Phenomena · Physics 2019-08-14 A. López-Oramas , O. Blanch Bigas , J. Cortina , D. Hadasch , A. Herrero , B. Marcote , P. Munar-Adrover , J. Moldón , J. M. Paredes , I. Ribas , M. Ribó , D. Torres , R. Zanin

The MAGIC highlights of the gamma ray binary LS I +61 303

The discovery of emission of TeV gamma rays from X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms in compact binary systems. Here we present the pioneering…

High Energy Astrophysical Phenomena · Physics 2009-07-07 T. Jogler , N. Puchades , O. Blanch Bigas , V. Bosch-Ramon , J. Cortina , J. Moldón , J. M. Paredes , M. A. Perez-Torres , M. Ribó , J. Rico , D. F. Torres , V. Zabalza , MAGIC collaboration

New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200

AIMS: To investigate the very high energy (VHE: >100 GeV) gamma-ray emission from the high-frequency peaked BL Lac 1ES 0229+200. METHODS: Observations of 1ES 0229+200 at energies above 580 GeV were performed with the High Energy…

Astrophysics · Physics 2007-11-27 HESS Collaboration , F. Aharonian

Discovery of very high energy gamma rays from PKS 1424+240 and multiwavelength constraints on its redshift

We report the first detection of very-high-energy (VHE) gamma-ray emission above 140 GeV from PKS 1424+240, a BL Lac object with an unknown redshift. The photon spectrum above 140 GeV measured by VERITAS is well described by a power law…

Cosmology and Nongalactic Astrophysics · Physics 2016-03-23 The VERITAS Collaboration , V. A. Acciari , The Fermi Collaboration , : , A. A. Abdo , S. D. Barber , D. M. Terndrup

Discovery of very high-energy gamma-ray emission from the LBL object BL Lacertae

The low-frequency peaked BL Lac (LBL) object BL Lacertae was observed with the MAGIC telescope from 2005 August to December (22.2 hr), and from 2006 July to September (26.0 hr). A very high energy (VHE) gamma-ray signal was discovered with…

Astrophysics · Physics 2007-09-17 MAGIC Collaboration , M. Hayashida , K. Berger , E. Lindfors , V. Vitale , R. Wagner , E. Lorenz

Decadal VERITAS Observation of LS I +61$^{\circ}$303 : Detection of TeV emission around the entire orbit

The TeV binary system \lsi has a compact object in an eccentric orbit around a Be star about 2 kpc from Earth. \lsi exhibits modulated gamma-ray emission around its 26.5 days orbit, mostly detectable at TeV energies around its apastron…

High Energy Astrophysical Phenomena · Physics 2017-08-18 Payel Kar , The VERITAS Collaboration

Orbital and superorbital variability of LS I +61 303 at low radio frequencies with GMRT and LOFAR

LS I +61 303 is a gamma-ray binary that exhibits an outburst at GHz frequencies each orbital cycle of $\approx$ 26.5 d and a superorbital modulation with a period of $\approx$ 4.6 yr. We have performed a detailed study of the low-frequency…

High Energy Astrophysical Phenomena · Physics 2016-01-27 B. Marcote , M. Ribó , J. M. Paredes , C. H. Ishwara-Chandra , J. D. Swinbank , J. W. Broderick , S. Markoff , R. Fender , R. A. M. J. Wijers , G. G. Pooley , A. J. Stewart , M. E. Bell , R. P. Breton , D. Carbone , S. Corbel , J. Eislöffel , H. Falcke , J. -M. Grießmeier , M. Kuniyoshi , M. Pietka , A. Rowlinson , M. Serylak , A. J. van der Horst , J. van Leeuwen , M. W. Wise , P. Zarka

VERITAS and Multiwavelength Observations of the BL Lacertae Object 1ES 1741+196

We present results from multiwavelength observations of the BL Lacertae object 1ES 1741+196, including results in the very-high-energy $\gamma$-ray regime using the Very Energetic Radiation Imaging Telescope Array System (VERITAS). The…

High Energy Astrophysical Phenomena · Physics 2016-05-25 VERITAS Collaboration , A. U. Abeysekara , S. Archambault , A. Archer , W. Benbow , R. Bird , J. Biteau , M. Buchovecky , J. H. Buckley , V. Bugaev , K. Byrum , J. V Cardenzana , M. Cerruti , X. Chen , J. L. Christiansen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , J. D. Eisch , M. Errando , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , A. Flinders , P. Fortin , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , G. Gyuk , M. Hütten , D. Hanna , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , N. Kelley-Hoskins , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , S. Kumar , M. J. Lang , G. Maier , S. McArthur , A. McCann , K. Meagher , P. Moriarty , R. Mukherjee , D. Nieto , S. O'Brien , A. O'Faoláin de Bhróithe , R. A. Ong , A. N. Otte , N. Park , V. Pelassa , A. Petrashyk , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , G. Ratliff , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , C. Rulten , M. Santander , G. H. Sembroski , K. Shahinyan , A. W. Smith , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , S. Vincent , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer

LS I+61 303: microquasar or not microquasar?

LS I +61 303 is a puzzling object detected from radio up to high-energy gamma-rays. Variability has recently been observed in its high-energy emission. The object is a binary system, with a compact object and a Be star as primary. The…

Astrophysics · Physics 2009-06-23 G. E. Romero , M. Orellana , A. T. Okazaki , S. P. Owocki

Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes

We report on the detection with the MAGIC telescopes of very high energy gamma-rays from IC 310, a head-tail radio galaxy in the Perseus galaxy cluster, observed during the interval November 2008 to February 2010. The Fermi satellite has…

High Energy Astrophysical Phenomena · Physics 2015-05-19 MAGIC Collaboration , J. Aleksić , L. A. Antonelli , P. Antoranz , M. Backes , J. A. Barrio , D. Bastieri , J. Becerra González , W. Bednarek , A. Berdyugin , K. Berger , E. Bernardini , A. Biland , O. Blanch , R. K. Bock , A. Boller , G. Bonnoli , P. Bordas , D. Borla Tridon , V. Bosch-Ramon , D. Bose , I. Braun , T. Bretz , M. Camara , A. Cañellas , E. Carmona , A. Carosi , P. Colin , E. Colombo , J. L. Contreras , L. Cossio , J. Cortina , S. Covino , F. Dazzi , A. De Angelis , E. De Cea del Pozo , B. De Lotto , M. De Maria , F. De Sabata , C. Delgado Mendez , A. Diago Ortega , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , D. Elsaesser , M. Errando , D. Ferenc , M. V. Fonseca , L. Font , R. J. García López , M. Garczarczyk , G. Giavitto , N. Godinović , D. Hadasch , A. Herrero , D. Hildebrand , D. Höhne-Mönch , J. Hose , D. Hrupec , T. Jogler , S. Klepser , T. Krähenbühl , D. Kranich , J. Krause , A. La Barbera , E. Leonardo , E. Lindfors , S. Lombardi , F. Longo , M. López , E. Lorenz , P. Majumdar , M. Makariev , G. Maneva , N. Mankuzhiyil , K. Mannheim , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , M. Meucci , J. M. Miranda , R. Mirzoyan , H. Miyamoto , J. Moldón , A. Moralejo , D. Nieto , K. Nilsson , R. Orito , I. Oya , R. Paoletti , J. M. Paredes , S. Partini , M. Pasanen , F. Pauss , R. G. Pegna , M. A. Perez-Torres , M. Persic , L. Peruzzo , J. Pochon , F. Prada , P. G. Prada Moroni , E. Prandini , N. Puchades , I. Puljak , I. Reichardt , R. Reinthal , W. Rhode , M. Ribó , J. Rico , S. Rügamer , A. Saggion , K. Saito , T. Y. Saito , M. Salvati , M. Sánchez-Conde , K. Satalecka , V. Scalzotto , V. Scapin , C. Schultz , T. Schweizer , M. Shayduk , S. N. Shore , A. Sierpowska-Bartosik , A. Sillanpää , J. Sitarek , D. Sobczynska , F. Spanier , S. Spiro , A. Stamerra , B. Steinke , J. Storz , N. Strah , J. C. Struebig , T. Suric , L. Takalo , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , D. F. Torres , H. Vankov , R. M. Wagner , Q. Weitzel , V. Zabalza , F. Zandanel , R. Zanin , A. Neronov , C. Pfrommer , A. Pinzke , D. V. Semikoz

Simultaneous X-ray and Radio Monitoring of the Unusual Binary LSI+61 303: Measurements of the Lightcurve and High-Energy Spectrum

The binary system, LSI+61 303, is unusual both because of the dramatic, periodic, radio outbursts, and because of its possible association with the 100 MeV gamma-ray source, 2CG135+01. We have performed simultaneous radio and Rossi X-ray…

Astrophysics · Physics 2009-10-31 F. A. Harrison , P. S. Ray , D. A. Leahy , E. B. Waltman , G. G. Pooley

Highlights of Galactic Physics with VERITAS

VERITAS (Very Energetic Radiation Imaging Telescope Array System) is one of the most sensitive currently operating arrays of imaging atmospheric Cherenkov telescopes, which detect very high-energy (VHE; E > 100 GeV) gamma rays. VERITAS is…

High Energy Astrophysical Phenomena · Physics 2019-08-16 Gregory T. Richards

A Search for Very High-Energy Gamma Rays from the Missing Link Binary Pulsar J1023+0038 with VERITAS

The binary millisecond radio pulsar PSR J1023+0038 exhibits many characteristics similar to the gamma-ray binary system PSR B1259--63/LS 2883, making it an ideal candidate for the study of high-energy non-thermal emission. It has been the…

High Energy Astrophysical Phenomena · Physics 2016-11-15 E. Aliu , S. Archambault , A. Archer , W. Benbow , R. Bird , J. Biteau , M. Buchovecky , J. H. Buckley , V. Bugaev , K. Byrum , J. V Cardenzana , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , H. J. Dickinson , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , A. Flinders , P. Fortin , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , G. Gyuk , M. Hütten , N. Håkansson , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , N. Kelley-Hoskins , M. Kertzman , D. Kieda , M. Krause , M. J. Lang , A. Loo , G. Maier , S. McArthur , A. McCann , K. Meagher , P. Moriarty , R. Mukherjee , T. Nguyen , D. Nieto , A. O'Faoláin de Bhróithe , R. A. Ong , A. N. Otte , D. Pandel , N. Park , V. Pelassa , A. Petrashyk , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , C. Rulten , M. Santander , G. H. Sembroski , K. Shahinyan , A. W. Smith , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , A. Varlotta , S. Vincent , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer , M. Chernyakova , M. Roberts

A Three-Year Multi-Wavelength Study of the Very High Energy Gamma-ray Blazar 1ES 0229+200

The high-frequency-peaked BL Lacertae object 1ES 0229+200 is a relatively distant (z = 0.1396), hard-spectrum (Gamma ~ 2.5), very-high-energy-emitting (E > 100 GeV) gamma-ray blazar. Very-high-energy measurements of this active galactic…

High Energy Astrophysical Phenomena · Physics 2015-06-18 E. Aliu , S. Archambault , T. Arlen , T. Aune , B. Behera , M. Beilicke , W. Benbow , K. Berger , R. Bird , A. Bouvier , J. H. Buckley , V. Bugaev , K. Byrum , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , C. Duke , J. Dumm , M. Errando , A. Falcone , S. Federici , Q. Feng , J. P. Finley , H. Fleischhack , P. Fortin , L. Fortson , A. Furniss , N. Galante , G. H. Gillanders , S. Griffin , S. T. Griffiths , J. Grube , G. Gyuk , D. Hanna , J. Holder , G. Hughes , T. B. Humensky , C. A. Johnson , P. Kaaret , M. Kertzman , Y. Khassen , D. Kieda , H. Krawczynski , F. Krennrich , M. J. Lang , A. S Madhavan , G. Maier , P. Majumdar , S. McArthur , A. McCann , K. Meagher , J. Millis , P. Moriarty , R. Mukherjee , D. Nieto , A. O'Faolain de Bhroithe , R. A. Ong , A. N. Otte , N. Park , J. S. Perkins , M. Pohl , A. Popkow , H. Prokoph , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , G. T. Richards , E. Roache , G. H. Sembroski , A. W. Smith , D. Staszak , I. Telezhinsky , M. Theiling , A. Varlotta , V. V. Vassiliev , S. Vincent , S. P. Wakely , T. C. Weekes , A. Weinstein , R. Welsing , D. A. Williams , A. Zajczyk , B. Zitzer

High zenith angle observations of PKS 2155-304 with the MAGIC-I telescope

The high frequency peaked BL Lac PKS 2155-304 with a redshift of z=0.116 was discovered in 1997 in the very high energy (VHE, E >100GeV) gamma-ray range by the University of Durham Mark VI gamma-ray Cherenkov telescope in Australia with a…

High Energy Astrophysical Phenomena · Physics 2015-06-05 The MAGIC Collaboration , J. Aleksić , L. A. Antonelli , P. Antoranz , M. Asensio , U. Barres de Almeida , J. A. Barrio , J. Becerra González , W. Bednarek , K. Berger , E. Bernardini , A. Biland , O. Blanch , R. K. Bock , A. Boller , G. Bonnoli , D. Borla Tridon , T. Bretz , E. Carmona , A. Carosi , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , L. Cossio , S. Covino , P. Da Vela , F. Dazzi , A. De Angelis , G. De Caneva , E. De Cea del Pozo , B. De Lotto , C. Delgado Mendez , A. Diago Ortega , M. Doert , D. Dominis Prester , D. Dorner , M. Doro , D. Eisenacher , D. Elsaesser , D. Ferenc , M. V. Fonseca , L. Font , C. Fruck , R. J. García López , M. Garczarczyk , D. Garrido Terrats , M. Gaug , G. Giavitto , N. Godinović , A. González Muñoz , S. R. Gozzini , A. Hadamek , D. Hadasch , D. Häfner , A. Herrero , J. Hose , D. Hrupec , B. Huber , F. Jankowski , T. Jogler , V. Kadenius , S. Klepser , M. L. Knoetig , T. Krähenbühl , J. Krause , J. Kushida , A. La Barbera , D. Lelas , E. Leonardo , N. Lewandowska , E. Lindfors , S. Lombardi , M. López , R. López-Coto , A. López-Oramas , E. Lorenz , M. Makariev , G. Maneva , N. Mankuzhiyil , K. Mannheim , L. Maraschi , B. Marcote , M. Mariotti , M. Martínez , D. Mazin , M. Meucci , J. M. Miranda , R. Mirzoyan , J. Moldón , A. Moralejo , P. Munar-Adrover , A. Niedzwiecki , D. Nieto , K. Nilsson , N. Nowak , R. Orito , S. Paiano , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , S. Partini , M. Persic , M. Pilia , J. Pochon , F. Prada , P. G. Prada Moroni , E. Prandini , I. Puljak , I. Reichardt , R. Reinthal , W. Rhode , M. Ribó , J. Rico , S. Rügamer , A. Saggion , K. Saito , T. Y. Saito , M. Salvati , K. Satalecka , V. Scalzotto , V. Scapin , C. Schultz , T. Schweizer , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , F. Spanier , S. Spiro , V. Stamatescu , A. Stamerra , B. Steinke , J. Storz , S. Sun , T. Surić , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , O. Tibolla , D. F. Torres , T. Toyama , A. Treves , M. Uellenbeck , P. Vogler , R. M. Wagner , Q. Weitzel , V. Zabalza , F. Zandanel , R. Zanin

Multiwavelength Observations of the VHE Blazar 1ES 2344+514

Multiwavelength observations of the high-frequency-peaked blazar 1ES2344+514 were performed from 2007 October to 2008 January. The campaign represents the first contemporaneous data on the object at very high energy (VHE, E >100 GeV)…

High Energy Astrophysical Phenomena · Physics 2015-05-28 V. A. Acciari , E. Aliu , T. Arlen , T. Aune , M. Beilicke , W. Benbow , D. Boltuch , V. Bugaev , A. Cannon , L. Ciupik , P. Cogan , P. Colin , R. Dickherber , A. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. F. Fortson , A. Furniss , D. Gall , G. H. Gillanders , J. Grube , R. Guenette , G. Gyuk , D. Hanna , J. Holder , D. Horan , C. M. Hui , T. B. Humensky , A. Imran , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , J. Kildea , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , P. Moriarty , R. Mukherjee , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , A. Pichel , M. Pohl , J. Quinn , K. Ragan , P. T. Reynolds , H. J. Rose , M. Schroedter , G. H. Sembroski , A. W. Smith , D. Steele , S. P. Swordy , M. Theiling , J. A. Toner , A. Varlotta , V. V. Vassiliev , S. Vincent , R. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , S. Wissel , M. Wood , B. Zitzer

Discovery of VHE $\gamma$-ray emission from the SNR G54.1+0.3

We report the discovery of very high energy gamma-ray emission from the direction of the SNR G54.1+0.3 using the VERITAS ground-based gamma-ray observatory. The TeV signal has an overall significance of 6.8$\sigma$ and appears point-like…

High Energy Astrophysical Phenomena · Physics 2016-08-14 V. A. Acciari , E. Aliu , T. Arlen , T. Aune , M. Bautista , M. Beilicke , W. Benbow , D. Boltuch , S. M. Bradbury , J. H. Buckley , V. Bugaev , Y. Butt , K. Byrum , A. Cesarini , L. Ciupik , W. Cui , R. Dickherber , C. Duke , J. P. Finley , G. Finnegan , L. Fortson , A. Furniss , N. Galante , D. Gall , G. H. Gillanders , S. Godambe , E. V. Gotthelf , 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 , M. J. Lang , S. LeBohec , G. Maier , S. McArthur , A. McCann , M. McCutcheon , P. Moriarty , R. Muhkerjee , 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 , P. Slane , A. W. Smith , D. Steele , S. P. Swordy , G. Těsić , M. Theiling , S. Thibadeau , 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 , B. Zitzer

VERITAS Observations of High-Mass X-Ray Binary SS 433

Despite decades of observations across all wavebands and dedicated theoretical modelling, the SS 433 system still poses many questions, especially in the high-energy range. SS 433 is a high-mass X-ray binary at a distance of $\sim 5.5$ kpc,…

High Energy Astrophysical Phenomena · Physics 2017-08-17 Payel Kar , The VERITAS Collaboration

Energy-dependent periodicities of LS I +61$^\circ$ 303 in the GeV band

LS I +61$^\circ$303 is a rare representative of the gamma-ray binaries with a compact object known to be a pulsar. We report on the periodicity and spectral analysis of this source performed with more than 14 years of Fermi/LAT data. The…

High Energy Astrophysical Phenomena · Physics 2023-08-16 M. Chernyakova , D. Malyshev , A. Neronov , D. Savchenko

Using H-alpha as a Tracer of the Emission Region of LS I +61 303

The gamma-ray binary LS I +61 303 is one of the brightest Fermi sources, with orbitally modulated emission across the electromagnetic spectrum. Here we present H-alpha spectra of LS I +61 303 that exhibit a dramatic emission burst shortly…

High Energy Astrophysical Phenomena · Physics 2011-11-02 M. Virginia McSwain