Related papers: VERITAS observations of exceptionally bright TeV f…

VERITAS Observations of the gamma-Ray Binary LS I +61 303

LS I +61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy gamma-rays. The system was observed over several orbital cycles (between September 2006 and February 2007) with the…

Astrophysics · Physics 2009-11-13 V. A. Acciari , M. Beilicke , G. Blaylock , S. M. Bradbury , J. H. Buckley , V. Bugaev , Y. Butt , K. L. Byrum , O. Celik , A. Cesarini , L. Ciupik , Y. C. K. Chow , P. Cogan , P. Colin , W. Cui , M. K. Daniel , C. Duke , T. Ergin , A. D. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. F. Fortson , D. Gall , K. Gibbs , G. H. Gillanders , J. Grube R. Guenette , D. Hanna , E. Hays , J. Holder , D. Horan , S. B. Hughes , C. M. Hui , T. B. Humensky , P. Kaaret , D. B. Kieda , J. Kildea , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , K. Lee , G. Maier , A. McCann , M. McCutcheon , J. Millis , P. Moriarty , R. Mukherjee , T. Nagai , R. A. Ong , D. Pandel , J. S. Perkins , F. Pizlo , 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 , J. A. Toner , L. Valcarcel , V. V. Vassiliev , R. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , R. J. White , D. A. Williams , S. A. Wissel , M. Wood , B. Zitzer

Exceptionally bright TeV flares from the binary LS I +61$^\circ$ 303

The TeV binary system LS I +61$^\circ$ 303 is known for its regular, non-thermal emission pattern which traces the orbital period of the compact object in its 26.5 day orbit around its B0 Ve star companion. The system typically presents…

High Energy Astrophysical Phenomena · Physics 2016-02-03 VERITAS Collaboration , S. Archambault , A. Archer , T. Aune , A. Barnacka , W. Benbow , R. Bird , M. Buchovecky , J. H. Buckley , V. Bugaev , K. Byrum , J. V. Cardenzana , M. Cerruti , X. Chen , L. Ciupik , E. Collins-Hughes , M. P. Connolly , W. Cui , H. J. Dickinson , J. Dumm , 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. Huetten , N. Hakansson , D. Hanna , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , N. Kelley-Hoskins , M. Kertzman , Y. Khassen , D. Kieda , M. Krause , F. Krennrich , S. Kumar , M. J. Lang , G. Maier , S. McArthur , A. McCann , K. Meagher , J. Millis , P. Moriarty , R. Mukherjee , D. Nieto , S. O'Brien , A. O'Faolain de Bhroithe , R. A. Ong , A. N. Otte , D. Pandel , N. Park , V. Pelassa , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , J. Rousselle , 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

Observation of LS I +61 303 with VERITAS

The high mass X-ray binary LS I +61 303 has been observed over several months in 2006 and 2007 with the VERITAS array of imaging air-Cherenkov telescopes. A signal of high energy gamma rays with energies above 350 GeV is detected in several…

Astrophysics · Physics 2007-09-25 Gernot Maier

VERITAS Observations of the TeV Binary LS I +61 303 During 2008-2010

We present the results of observations of the TeV binary LS I +61 303 with the VERITAS telescope array between 2008 and 2010, at energies above 300 GeV. In the past, both ground-based gamma-ray telescopes VERITAS and MAGIC have reported…

High Energy Astrophysical Phenomena · Physics 2015-05-28 V. A. Acciari , E. Aliu , T. Arlen , T. Aune , M. Beilicke , W. Benbow , S. M. Bradbury , J. H. Buckley , V. Bugaev , K. Byrum , A. Cannon , A. Cesarini , L. Ciupik , E. Collins-Hughes , M. P. Connolly , W. Cui , R. Dickherber , C. Duke , M. Errando , A. Falcone , J. P. Finley , G. Finnegan , L. Fortson , A. Furniss , N. Galante , D. Gall , G. H. Gillanders , S. Godambe , S. Griffin , J. Grube , R. Guenette , G. Gyuk , D. Hanna , J. Holder , G. Hughes , C. M. Hui , T. B. Humensky , P. Kaaret , N. Karlsson , M. Kertzman , D. Kieda , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , P. Majumdar , S. McArthur , A. McCann , P. Moriarty , R. Mukherjee , R. A. Ong , M. Orr , A. N. Otte , N. Park , J. S. Perkins , M. Pohl , H. Prokoph , J. Quinn , K. Ragan , L. C. Reyes , P. T. Reynolds , E. Roache , H. J. Rose , J. Ruppel , D. B. Saxon , M. Schroedter , G. H. Sembroski , G. Demet Senturk , A. W. Smith , D. Staszak , G. Tesic , M. Theiling , S. Thibadeau , K. Tsurusaki , A. Varlotta , V. V. Vassiliev , S. Vincent , M. Vivier , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , B. Zitzer

Multi-wavelength Observations of LS I +61 303 with VERITAS, Swift and RXT E: 2006-2008

A long term, multi-wavelength monitoring campaign on the TeV binary LS I +61 303 has been performed utilizing >300 GeV observations with VERITAS along with monitoring in the 0.2-10 keV band by RXTE and Swift between September 2006 and…

Astrophysics · Physics 2019-08-13 A. W. Smith

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

VERITAS monitoring of LS I +61$^\circ$ 303 in conjunction with X-ray, and GeV observation campaigns

One of the most enigmatic TeV binary systems, LS I +61$^\circ$ 303 exhibits a high degree of flux modulation from radio to TeV wavelengths over a single orbit of the binary system, once every $\sim$26.5 days. The binary system also exhibits…

High Energy Astrophysical Phenomena · Physics 2019-08-17 Payel Kar

Multiwavelength Observations of LS I +61 303 with VERITAS, Swift and RXTE

We present results from a long-term monitoring campaign on the TeV binary LSI +61 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between September…

High Energy Astrophysical Phenomena · Physics 2015-05-13 VERITAS Collaboration , V. A. Acciari , E. Aliu , T. Arlen , M. Bautista , M. Beilicke , W. Benbow , M. Bottcher , S. M. Bradbury , V. Bugaev , Y. Butt , Y. Butt , K. Byrum0 , A. Cannon , A. Cesarini , Y. C. Chow , L. Ciupik , P. Cogan , P. Colin , W. Cui , M. Daniel , R. Dickherber , T. Ergin , A. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. Fortson , A. Furniss , D. Gall , G. H. Gillanders , J. Grube , R. Guenette , G. Gyuk , D. Hanna , E. Hays , J. Holder , D. Horan , C. M. Hui , T. B. Humensky , P. Kaaret , N. Karlsson , D. Kieda , J. Kildea , A. Konopelko , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , A. McCann , M. McCutcheon , J. Millis , P. Moriarty , R. Mukherjee , T. Nagai , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , 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 , A. W. Smith , D. Steele , M. Stroh , S. Swordy , M. Theiling , J. A. Toner , A. Varlotta , V. V. Vassiliev , R. G. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinsteiny , R. J. White , D. A. Williams , S. Wissely , M. Woody , B. Zitzer

The exceptional TeV flaring activity of the blazar 1ES 1959+650 in 2015 and 2016 as observed with VERITAS

The high-synchrotron-peaked blazar 1ES 1959+650 was among the first extragalactic sources detected in the very high energy gamma ray band (VHE, E > 100 GeV). In October 2015, the source entered an extended period of activity that continued…

High Energy Astrophysical Phenomena · Physics 2019-08-14 M. Santander

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

VERITAS Observations of a Very High Energy Gamma-ray Flare from the Blazar 3C 66A

The intermediate-frequency peaked BL Lacertae (IBL) object 3C 66A is detected during 2007 - 2008 in VHE (very high energy: E > 100 GeV) gamma-rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov telescopes. An excess of…

High Energy Astrophysical Phenomena · Physics 2010-12-14 VERITAS Collaboration , V. A. Acciari , E. Aliu , T. Arlen , M. Beilicke , W. Benbow , M. Bottcher , S. M. Bradbury , J. H. Buckley , V. Bugaev , Y. Butt , K. Byrum , A. Cannon , O. Celik , A. Cesarini , Y. C. Chow , L. Ciupik , P. Cogan , W. Cui , M. K. Daniel , R. Dickherber , T. Ergin , A. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. Fortson , A. Furniss , D. Gall , K. Gibbs , G. H. Gillanders , S. Godambe , J. Grube , R. Guenette , G. Gyuk , D. Hanna , E. Hays , 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 , A. McCann , M. McCutcheon , J. Millis , P. Moriarty , R. Mukherjee , T. Nagai , R. A. Ong , A. N. Otte , D. Pandel , J. S. Perkins , D. Petry , F. Pizlo , 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 , J. A. Toner , A. Varlotta , V. V. Vassiliev , R. G. Wagner , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , D. A. Williams , S. Wissel , M. Wood , B. Zitzer

Very High-energy Gamma-ray Emission from LS I +61$^\circ$ ~303 Binary

LS I +61$^\circ$ ~303 is one of around ten gamma-ray binaries detected so far which has a spectral energy distribution dominated by MeV-GeV photons. It is located at a distance of 2 kpc and consists of a compact object (black hole or…

High Energy Astrophysical Phenomena · Physics 2021-08-23 D. B. Kieda

VERITAS discovery of very high energy gamma-ray emission from S3 1227+25 and multiwavelength observations

We report the detection of very high energy gamma-ray emission from the blazar S3 1227+25 (VER J1230+253) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). VERITAS observations of the source were triggered by the…

High Energy Astrophysical Phenomena · Physics 2023-06-21 Atreya Acharyya , Colin Adams , Avery Archer , Priyadarshini Bangale , Wystan Benbow , Aryeh Brill , Jodi Christiansen , Alisha Chromey , Manel Errando , Abe Falcone , Qi Feng , John Finley , Gregory Foote , Lucy Fortson , Amy Furniss , Greg Gallagher , William Hanlon , David Hanna , Olivier Hervet , Claire Hinrichs , John Hoang , Jamie Holder , Weidong Jin , Madalyn Johnson , Philip Kaaret , Mary P. Kertzman , David Kieda , Tobias Kleiner , Nikolas Korzoun , Frank Krennrich , Mark Lang , Matthew Lundy , Gernot Maier , Conor McGrath , Matthew Millard , John Millis , Connor Mooney , Patrick Moriarty , Reshmi Mukherjee , Stephan O'Brien , Rene A. Ong , Martin Pohl , Elisa Pueschel , John Quinn , Kenneth J. Ragan , Paul Reynolds , Deivid Ribeiro , Emmet Thomas Roache , Iftach Sadeh , Alberto Sadun , Lab Saha , Marcos Santander , Glenn Sembroski , Ruo Shang , Megan Splettstoesser , Anjana Talluri , James Tucci , Vladimir Vassiliev , David Williams , Sam Wong , Talvikki Hovatta , Svetlana Jorstad , Sebastian Kiehlmann , Anne Lahteenmaki , Ioannis Liodakis , Alan Marscher , Walter Max-Moerbeck , Anthony Readhead , Rodrigo Reeves , Paul S Smith , Merja Tornikoski

VERITAS long-term (2006-2014) observations of the BL Lac object 1ES 0806+524

The discovery of the high-frequency-peaked BL Lac object 1ES 0806+524 (z=0.138) as a source of very-high-energy (VHE, E>100 GeV) gamma-ray photons was announced in 2008 by the VERITAS Collaboration, at a level of 1.8% of the Crab Nebula…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Matteo Cerruti

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

A luminous and isolated gamma-ray flare from the blazar B2 1215+30

B2 1215+30 is a BL Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes, and subsequently confirmed by the VERITAS observatory with data collected between 2009 and 2012. In 2014 February 08,…

High Energy Astrophysical Phenomena · Physics 2017-02-23 VERITAS Collaboration , A. U. Abeysekara , S. Archambault , A. Archer , W. Benbow , R. Bird , M. Buchovecky , J. H. Buckley , V. Bugaev , K. Byrum , M. Cerruti , X. Chen , L. Ciupik , W. Cui , H. J. Dickinson , J. D. Eisch , M. Errando , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , M. Hutten , N. Hakansson , D. Hanna , J. Holder , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , 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 , T. Nguyen , D. Nieto , R. A. Ong , A. N. Otte , N. Park , V. Pelassa , 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 , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , Fermi-LAT Collaboration , : , S. Fegan , B. Giebels , D. Horan , A. Berdyugin , J. Kuan , E. Lindfors , K. Nilsson , A. Oksanen , H. Prokoph , R. Reinthal , L. Takalo , F. Zefi

VERITAS Observations of LS I +61 303 in the Fermi Era

The high-mass X-ray binary system LS I +61 303 is well known as a rare example of a variable Galactic GeV and TeV gamma-ray emitter. Despite years of study, many aspects of the system remain unclear; the nature of the compact object, the…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Jamie Holder

VERITAS observations of the Be/X-ray binary system LS V +44 17 during a major outburst

The Be/X-ray binary system LS V +44 17 (RX J0440.9+4431) is a potential member of the rare class of gamma-ray binaries. The system is comprised of a Be star and a neutron star companion with an orbital period of 150 days. In December of…

High Energy Astrophysical Phenomena · Physics 2023-08-24 Jamie Holder

Periodic very high energy gamma-ray emission from LS I +61 303 observed with the MAGIC telescope

The MAGIC collaboration has recently reported the discovery of gamma-ray emission from the binary system LS I +61 303 in the TeV energy region. Here we present new observational results on this source in the energy range between 300 GeV and…

Astrophysics · Physics 2009-03-27 MAGIC Collaboration , J. Albert

TeV and X-ray Monitoring of LS I +61 303 With VERITAS, Swift, and RXTE

Between September 2006 and February 2007, the galactic binary LS I +61 303 was monitored in the TeV band with the VERITAS array of imaging Cherenkov telescopes. These observations confirm LS I +61 303 as a variable TeV gamma-ray source,…

Astrophysics · Physics 2007-09-28 VERITAS Collaboration , A. Smith