Related papers: Recent Highlights from the VERITAS AGN Discovery P…

Update of the INTEGRAL/IBIS AGN catalogue: deeper on the Galactic plane and wider beyond

In this work we have updated the list of AGN detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN increasing the number of INTEGRAL detected active galaxies…

High Energy Astrophysical Phenomena · Physics 2023-03-29 A. Malizia , L. Bassani , R. Landi , M. Molina , N. Masetti , E. Palazzi , G. Bruni , A. Bazzano , P. Ubertini , A. J. Bird

The First VERITAS Telescope

The first atmospheric Cherenkov telescope of VERITAS (the Very Energetic Radiation Imaging Telescope Array System) has been in operation since February 2005. We present here a technical description of the instrument and a summary of its…

Astrophysics · Physics 2008-11-26 J. Holder , R. W. Atkins , H. M. Badran , G. Blaylock , S. M. Bradbury , J. H. Buckley , K. L. Byrum , D. A. Carter-Lewis , O. Celik , Y. C. K. Chow , P. Cogan , W. Cui , M. K. Daniel , I. de la Calle Perez , C. Dowdall , P. Dowkontt , C. Duke , A. D. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. F. Fortson , K. Gibbs , G. Gillanders , O. J. Glidewell , J. Grube , K. J. Gutierrez , G. Gyuk , J. Hall , D. Hanna , E. Hays , D. Horan , S. B. Hughes , T. B. Humensky , A. Imran , I. Jung , P. Kaaret , G. E. Kenny , D. Kieda , J. Kildea , J. Knapp , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , E. Linton , E. K. Little , G. Maier , H. Manseri , A. Milovanovic , P. Moriarty , R. Mukherjee , P. A. Ogden , R. A. Ong , J. S. Perkins , F. Pizlo , M. Pohl , J. Quinn , K. Ragan , P. T. Reynolds , E. T. Roache , H. J. Rose , M. Schroedter , G. H. Sembroski , G. Sleege , D. Steele , S. P. Swordy , A. Syson , J. A. Toner , L. Valcarcel , V. V. Vassiliev , S. P. Wakely , T. C. Weekes , R. J. White , D. A. Williams , R. Wagner

VERITAS Observations of The Galactic Center Ridge

The Galactic Center Ridge has been observed extensively in the past by both GeV and TeV instruments revealing a wealth of structure, including both a diffuse component, the point sources G0.9+0.1 (a composite supernova remnant) and SgrA*…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Andrew W. Smith

VERITAS Discovery of Very High-Energy Gamma-Ray Emission from RGB J2243+203

RGB J2243+203 is a blazar at an estimated redshift of greater than 0.39 that has been classified both as an intermediate-frequency-peaked BL Lac object and as a high-frequency-peaked BL Lac object. This source has been detected by VERITAS…

High Energy Astrophysical Phenomena · Physics 2019-08-13 A. U. Abeysekara

Very-High-Energy $\gamma$-Ray Observations of the Blazar 1ES 2344+514 with VERITAS

We present very-high-energy $\gamma$-ray observations of the BL Lac object 1ES 2344+514 taken by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) between 2007 and 2015. 1ES 2344+514 is detected with a statistical…

High Energy Astrophysical Phenomena · Physics 2017-08-10 C. Allen , S. Archambault , A. Archer , W. Benbow , R. Bird , E. Bourbeau , R. Brose , M. Buchovecky , J. H. Buckley , V. Bugaev , J. V Cardenzana , M. Cerruti , X. Chen , J. L. Christiansen , M. P. Connolly , W. Cui , M. K. Daniel , J. D. Eisch , A. Falcone , Q. Feng , M. Fernandez-Alonso , J. P. Finley , H. Fleischhack , A. Flinders , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , M. Hütten , N. Håkansson , D. Hanna , O. Hervet , J. Holder , G. Hughes , 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 , T. Nguyen , D. Nieto , S. O'Brien , A. O'Faoláin de Bhróithe , R. A. Ong , A. N. Otte , N. Park , A. Petrashyk , A. Pichel , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , A. C. Rovero , C. Rulten , I. Sadeh , M. Santander , G. H. Sembroski , K. Shahinyan , I. Telezhinsky , J. V. Tucci , J. Tyler , S. P. Wakely , A. Weinstein , A. Wilhelm , D. A. Williams

Observation of M87 with VERITAS

The giant radio galaxy M87 is the only extragalactic non-blazar object which has been detected as a source of very high energy gamma-rays. It represents a unique opportunity to study the phenomena of gamma-ray emission from a nearby AGN. In…

Astrophysics · Physics 2007-09-25 Pierre Colin

Seeking Neutrino Emission from AGN through Temporal and Spatial Cross Correlation

Active galactic nuclei (AGN) are a promising source for high-energy astrophysical neutrinos (HEANs). By the end of 2022, the Vera C. Rubin Observatory (VRO) will begin to observe $\gtrsim10$ million AGN with a regular and high cadence.…

High Energy Astrophysical Phenomena · Physics 2022-07-13 Cyril Creque-Sarbinowski , Marc Kamionkowski , Bei Zhou

INTEGRAL view of the Extragalactic Sky

Presented in this work is the most comprehensive INTEGRAL AGN sample: it includes 272 active galaxies for which optical identifications and redshifts are available. 2-10 keV fluxes and column density measurements are also collected for all…

High Energy Astrophysical Phenomena · Physics 2011-12-22 A. Malizia , L. Bassani , R. Landi , A. Bazzano , A. J. Bird , F. Panessa

Current Status of VHE Astronomy

Very-high-energy astronomy studies the Universe at energies between 30 GeV and 100 TeV. The past decade has seen enormous progress in this field. There are now at least seven known sources of VHE photons. By studying these objects in the…

Astrophysics · Physics 2009-09-25 Gus Sinnis

Focal Plane Instrumentation of VERITAS

VERITAS is a new atmospheric Cherenkov imaging telescope array to detect very high energy gamma rays above 100 GeV. The array is located in southern Arizona, USA, at an altitude of 1268m above sea level. The array consists of four 12-m…

Astrophysics · Physics 2007-10-01 VERITAS Collaboration , T. Nagai , R. McKay , G. Sleege , D. Petry

Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011

About 40% of the observation time of the High Energy Stereoscopic System (H.E.S.S.) is dedicated to studying active galactic nuclei (AGN), with the aim of increasing the sample of known extragalactic very-high-energy (VHE, E>100 GeV)…

Astrophysics of Galaxies · Physics 2015-06-18 H. E. S. S. Collaboration , A. Abramowski , F. Aharonian , F. Ait Benkhali , A. G. Akhperjanian , E. Angüner , G. Anton , S. Balenderan , A. Balzer , A. Barnacka , Y. Becherini , J. Becker Tjus , K. Bernlöhr , E. Birsin , E. Bissaldi , J. Biteau , M. Böttcher , C. Boisson , J. Bolmont , P. Bordas , J. Brucker , F. Brun , P. Brun , T. Bulik , S. Carrigan , S. Casanova , M. Cerruti , P. M. Chadwick , R. Chalme-Calvet , R. C. G. Chaves , A. Cheesebrough , M. Chrétien , S. Colafrancesco , G. Cologna , J. Conrad , C. Couturier , Y. Cui , M. Dalton , M. K. Daniel , I. D. Davids , B. Degrange , C. Deil , P. deWilt , H. J. Dickinson , A. Djannati-Ataï , W. Domainko , L. O'C. Drury , G. Dubus , K. Dutson , J. Dyks , M. Dyrda , T. Edwards , K. Egberts , P. Eger , P. Espigat , C. Farnier , S. Fegan , F. Feinstein , M. V. Fernandes , D. Fernandez , A. Fiasson , G. Fontaine , A. Förster , M. Füßling , M. Gajdus , Y. A. Gallant , T. Garrigoux , G. Giavitto , B. Giebels , J. F. Glicenstein , M. -H. Grondin , M. Grudzińska , S. Häffner , J. Hahn , J. Harris , G. Heinzelmann , G. Henri , G. Hermann , O. Hervet , A. Hillert , J. A. Hinton , W. Hofmann , P. Hofverberg , M. Holler , D. Horns , A. Jacholkowska , C. Jahn , M. Jamrozy , M. Janiak , F. Jankowsky , I. Jung , M. A. Kastendieck , K. Katarzyński , U. Katz , S. Kaufmann , B. Khélifi , M. Kieffer , S. Klepser , D. Klochkov , W. Kluźniak , T. Kneiske , D. Kolitzus , Nu. Komin , K. Kosack , S. Krakau , F. Krayzel , P. P. Krüger , H. Laffon , G. Lamanna , J. Lefaucheur , A. Lemière , M. Lemoine-Goumard , J. -P. Lenain , D. Lennarz , T. Lohse , A. Lopatin , C. -C. Lu , V. Marandon , A. Marcowith , R. Marx , G. Maurin , N. Maxted , M. Mayer , T. J. L. McComb , J. Méhault , P. J. Meintjes , U. Menzler , M. Meyer , R. Moderski , M. Mohamed , E. Moulin , T. Murach , C. L. Naumann , M. de Naurois , J. Niemiec , S. J. Nolan , L. Oakes , S. Ohm , E. de Oña Wilhelmi , B. Opitz , M. Ostrowski , I. Oya , M. Panter , R. D. Parsons , M. Paz Arribas , N. W. Pekeur , G. Pelletier , J. Perez , P. -O. Petrucci , B. Peyaud , S. Pita , H. Poon , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Raab , M. Raue , A. Reimer , O. Reimer , M. Renaud , R. de los Reyes , F. Rieger , L. Rob , C. Romoli , S. Rosier-Lees , G. Rowell , B. Rudak , C. B. Rulten , V. Sahakian , D. A. Sanchez , A. Santangelo , R. Schlickeiser , F. Schüssler , A. Schulz , U. Schwanke , S. Schwarzburg , S. Schwemmer , H. Sol , G. Spengler , F. Spies , Ł. Stawarz , R. Steenkamp , C. Stegmann , F. Stinzing , K. Stycz , I. Sushch , A. Szostek , J. -P. Tavernet , T. Tavernier , A. M. Taylor , R. Terrier , M. Tluczykont , C. Trichard , K. Valerius , C. van Eldik , B. van Soelen , G. Vasileiadis , C. Venter , A. Viana , P. Vincent , H. J. Völk , F. Volpe , M. Vorster , T. Vuillaume , S. J. Wagner , P. Wagner , M. Ward , M. Weidinger , Q. Weitzel , R. White , A. Wierzcholska , P. Willmann , A. Wörnlein , D. Wouters , V. Zabalza , M. Zacharias , A. Zajczyk , A. A. Zdziarski , A. Zech , H. -S. Zechlin

Long-term gamma-ray observations of the binary HESS J0632+057 with H.E.S.S., MAGIC and VERITAS

The gamma-ray binary HESS J0632+057 has been observed at very-high energies (E $>$ 100 GeV) for more than ten years by the major systems of imaging atmospheric Cherenkov telescopes. We present a summary of results obtained with the…

High Energy Astrophysical Phenomena · Physics 2019-08-13 G. Maier , O. Blanch , D. Hadasch , A. López-Oramas , N. Komin , M. Lundy , D. Malyshev , J. Moepi , S. Ohm , G. Pühlhofer , R. Prado , S. Schlenstedt , D. F. Torres , B. Zitzer

TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS

The Galactic Center Ridge has been observed extensively in the past by both GeV and TeV gamma-ray instruments revealing a wealth of structure, including a diffuse component as well as the point sources G0.9+0.1 (a composite supernova…

High Energy Astrophysical Phenomena · Physics 2016-05-04 A. Archer , 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 , J. D. Eisch , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , A. Flinders , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , G. Gyuk , N. Hakansson , D. Hanna , J. Holder , T. B. Humensky , M. Hutten , C. A. Johnson , P. Kaaret , P. Kar , N. Kelley-Hoskins , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , S. Kumar , M. J. Lang , S. McArthur , A. McCann , K. Meagher , J. Millis , P. Moriarty , R. Mukherjee , D. Nieto , R. A. Ong , N. Park , V. Pelassa , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , G. Ratliff , P. T. Reynolds , G. T. Richards , E. Roache , J. Rousselle , M. Santander , G. H. Sembroski , K. Shahinyan , A. W. Smith , D. Staszak , I. Telezhinsky , J. V. Tucci , J. Tyler , V. V. Vassiliev , S. P. Wakely , O. M. Weiner , A. Weinstein , A. Wilhelm , D. A. Williams , B. Zitzer , F. Yusef-Zadeh

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

Cosmic evolution of AGN with moderate-to-high radiative luminosity in the COSMOS field

We study the moderate-to-high radiative luminosity active galactic nuclei (HLAGN) within the VLA-COSMOS 3 GHz Large Project. The survey covers 2.6 square degrees centered on the COSMOS field with a 1$\sigma$ sensitivity of 2.3 $\mathrm{\mu…

Astrophysics of Galaxies · Physics 2018-08-22 Lana Ceraj , Vernesa Smolčić , Ivan Delvecchio , Jacinta Delhaize , Mladen Novak

Recent results from VHE gamma astrophysics related to fundamental physics and cosmic rays

High-energy photons are a powerful probe for astrophysics and for fundamental physics under extreme conditions. During the recent years, our knowledge of the most violent phenomena in the universe has impressively progressed thanks to the…

High Energy Astrophysical Phenomena · Physics 2015-05-28 Alessandro De Angelis

Measurement of the Extragalactic Background Light with VERITAS

The extragalactic background light records the history of infrared, optical and ultraviolet light radiation including re-radiation since the epoch of reionization. While challenging to measure directly, it can be measured indirectly via its…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Elisa Pueschel

Studies of active galactic nuclei with CTA

In this paper, we review the prospects for studies of active galactic nuclei (AGN) using the envisioned future Cherenkov Telescope Array (CTA). This review focuses on jetted AGN, which constitute the vast majority of AGN detected at…

High Energy Astrophysical Phenomena · Physics 2012-08-30 A. Reimer , M. Boettcher

Discovery of High-energy and Very High Energy Gamma-ray Emission from the Blazar RBS 0413

We report on the discovery of high-energy (HE; E > 0.1 GeV) and very high-energy (VHE; E > 100 GeV) gamma-ray emission from the high-frequency-peaked BL Lac object RBS 0413. VERITAS, a ground-based gamma-ray observatory, detected VHE gamma…

High Energy Astrophysical Phenomena · Physics 2015-06-04 VERITAS Collaboration , E. Aliu , S. Archambault , T. Arlen , T. Aune , M. Beilicke , W. Benbow , M. Boettcher , A. Bouvier , S. M. Bradbury , J. H. Buckley , V. Bugaev , K. Byrum , A. Cannon , A. Cesarini , L. Ciupik , E. Collins-Hughes , M. P. Connolly , P. Coppi , W. Cui , G. Decerprit , R. Dickherber , J. Dumm , M. Errando , A. Falcone , Q. Feng , J. P. Finley , G. Finnegan , L. Fortson , A. Furniss , N. Galante , D. Gall , S. Godambe , S. Griffin , J. Grube , G. Gyuk , D. Hanna , K. Hawkins , J. Holder , H. Huan , G. Hughes , T. B. Humensky , P. Kaaret , N. Karlsson , M. Kertzman , Y. Khassen , D. Kieda , H. Krawczynski , F. Krennrich , M. J. Lang , K. Lee , A. S Madhavan , G. Maier , P. Majumdar , S. McArthur , A. McCann , P. Moriarty , R. Mukherjee , R. A. Ong , M. Orr , A. N. Otte , N. Palma , N. Park , J. S. Perkins , A. Pichel , 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. D. Senturk , A. W. Smith , D. Staszak , I. Telezhinsky , G. Tesic , M. Theiling , S. Thibadeau , K. Tsurusaki , A. Varlotta , M. Vivier , S. P. Wakely , J. E. Ward , T. C. Weekes , A. Weinstein , T. Weisgarber , D. A. Williams , B. Zitzer , P. Fortin , D. Horan

Augmentation of VERITAS Telescopes for Stellar Intensity Interferometry

In 2018-2019 the VERITAS VHE gamma-ray observatory was augmented with highspeed optical instrumentation and continuous data recording electronics to create a sensitive Stellar Intensity Interferometry (SII) observatory, VERITAS-SII. The…

Instrumentation and Methods for Astrophysics · Physics 2019-08-09 D. B. Kieda , VERITAS Collaboration , S. LeBohec , R cardon