Related papers: Observations of the BL Lac Object 3C 66A with STAC…

Very high energy observations of the BL Lac objects 3C 66A and OJ 287

Using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE), we have observed the BL Lac objects 3C 66A and OJ 287. These are members of the class of low-frequency-peaked BL Lac objects (LBLs) and are two of the three LBLs…

Astrophysics · Physics 2008-11-26 T. Lindner , D. S. Hanna , J. Kildea , J. Ball , D. A. Bramel , J. Carson , C. E. Covault , D. Driscoll , P. Fortin , D. M. Gingrich , A. Jarvis , C. Mueller , R. Mukherjee , R. A. Ong , K. Ragan , R. A. Scalzo , D. A. Williams , J. Zweerink

STACEE Observations of 1ES 1218+304

We present the analysis and results of recent high-energy gamma-ray observations of the high energy-peaked BL Lac (HBL) object 1ES 1218+304 with the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). 1ES 1218+304 is an X-ray…

Astrophysics · Physics 2007-10-24 STACEE Collaboration , R. Mukherjee , N. Akhter , J. Ball , J. E. Carson , C. E. Covault , D. D. Driscoll , P. Fortin , D. M. Gingrich , D. S. Hanna , A. Jarvis , J. Kildea , T. Lindner , C. Mueller , R. A. Ong , K. Ragan , D. A. Williams , J. Zweerink

High-Energy Gamma-Ray Observations of W Comae with STACEE

We report on observations of the blazar W Comae (ON+231) with the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE), a wavefront-sampling atmospheric Cherenkov telescope, in the spring of 2003. In a data set comprising 10.5 hours…

Astrophysics · Physics 2008-11-26 STACEE Collaboration , R. A. Scalzo , L. M. Boone , D. Bramel , J. Carson , C. E. Covault , P. Fortin , G. Gauthier , D. M. Gingrich , D. S. Hanna , A. Jarvis , J. Kildea , T. Lindner , C. Mueller , R. Mukherjee , R. A. Ong , K. J. Ragan , D. A. Williams , J. A. Zweerink

Very high-energy observations of the two high-frequency peaked BL Lac objects 1ES 1218+304 and H 1426+428

We present results of very-high-energy gamma-ray observations (E > 160 GeV) of two high-frequency-peaked BL Lac (HBL) objects, 1ES 1218+304 and H 1426+428, with the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). Both sources…

High Energy Astrophysical Phenomena · Physics 2011-07-28 C. Mueller , N. Akhter , J. Ball , D. A. Bramel , J. Carson , C. E. Covault , D. Driscoll , P. Fortin , D. M. Gingrich , D. S. Hanna , A. Jarvis , J. Kildea , T. Lindner , R. Mukherjee , R. A. Ong , K. Ragan , R. A. Scalzo , D. A. Williams , J. Zweerink

Gamma-Ray Burst Follow-up Observations with STACEE During 2003-2007

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is an atmospheric Cherenkov telescope (ACT) that uses a large mirror array to achieve a relatively low energy threshold. For sources with Crab-like spectra, at high…

Astrophysics · Physics 2007-10-24 STACEE Collaboration , A. Jarvis , J. Ball , J. E. Carson , C. E. Covault , D. D. Driscoll , P. Fortin , D. M. Gingrich , D. S. Hanna , J. Kildea , T. Lindner , R. Mukherjee , C. Mueller , R. A. Ong , K. Ragan , D. A. Williams , J. Zweerink

Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004

The BL Lac object 3C 66A was the target of an extensive multiwavelength monitoring campaign from July 2003 through April 2004, involving observations throughout the electromagnetic spectrum. Radio, infrared, and optical observations were…

Astrophysics · Physics 2009-11-11 M. Boettcher , J. Harvey , M. Joshi

Observations of the Pulsar PSR B1951+32 with the Solar Tower Atmospheric Cherenkov Effect Experiment

We present the analysis and results of 12.5 hours of high-energy gamma-ray observations of the EGRET-detected pulsar PSR B1951+32 using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE). STACEE is an atmospheric Cherenkov…

Astrophysics · Physics 2007-10-26 J. Kildea , J. Zweerink , J. Ball , J. E. Carson , C. E. Covault , D. D. Driscoll , P. Fortin , D. M. Gingrich , D. S. Hanna , A. Jarvis , T. Lindner , C. Mueller , R. Mukherjee , R. A. Ong , K. Ragan , D. A. Williams

The Status of the STACEE Observatory

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a ground-based instrument designed to study astrophysical sources of gamma radiation in the energy range of 50 to 500 GeV. STACEE uses an array of large heliostat mirrors…

Astrophysics · Physics 2007-05-23 C. E. Covault , L. M. Boone , D. Bramel , E. Chae , P. Fortin , D. M Gingrich , J. A. Hinton , D. S. Hanna , R. Mukherjee , C. Mueller R. A. Ong , K. Ragan , R. A. Scalzo , D. R. Schuette , C. G. Theoret , D. A. Williams

High Energy Gamma-Ray Observations of the Crab Nebula and Pulsar with the Solar Tower Atmospheric Cherenkov Effect Experiment

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a new ground-based atmospheric Cherenkov telescope for gamma-ray astronomy. STACEE uses the large mirror area of a solar heliostat facility to achieve a low energy…

Astrophysics · Physics 2015-05-27 STACEE Collaboration , S. Oser , D. Bhattacharya , L. M. Boone , M. C. Chantell , Z. Conner , C. E. Covault , M. Dragovan , P. Fortin , D. T. Gregorich , D. S. Hanna , R. Mukherjee , R. A. Ong , K. Ragan , R. A. Scalzo , D. R. Schuette , C. G. Theoret , T. O. Tumer , D. A. Williams , J. A. Zweerink

BL Lac: A New Ultrahigh-Energy Gamma-Ray Source

The active galactic nucleus BL Lac was observed with the Gt-48 atmospheric Cherenkov detector of the Crimean Astrophysical Observatory from July 23-September 1, 1998, in order to search for ultrahigh-energy gamma-ray (>1 TeV) emission. The…

Astrophysics · Physics 2009-11-07 Yu. I. Neshpor , N. N. Chalenko , A. A. Stepanian , O. R. Kalekin , N. A. Jogolev , V. P. Fomin , V. G. Shitov

Discovery of Very High Energy Gamma-Ray Emission from the BL Lac Object H2356-309 with the H.E.S.S. Cherenkov Telescopes

The extreme synchrotron BL Lac object H2356-309, located at a redshift of z = 0.165, was observed from June to December 2004 with a total exposure of approx. 40 h live-time with the H.E.S.S. (High Energy Stereoscopic System) array of…

Astrophysics · Physics 2009-11-11 Aharonian et al.

Modeling the Spectral Energy Distribution and Variability of 3C 66A during the WEBT campaign of 2003 -- 2004

The BL Lac object 3C 66A was observed in an extensive multiwavelength monitoring campaign from July 2003 till April 2004. The spectral energy distribution (SED) was measured over the entire electromagnetic spectrum, with flux measurements…

Astrophysics · Physics 2009-06-23 M. Joshi , M. Boettcher

STACEE Observations of Mrk 421 During the 2001 Flare

STACEE is a ground based gamma-ray observatory that uses a heliostat array, built for solar energy research, to detect atmospheric Cherenkov radiation from gamma-ray initiated extensive air showers. During the first half of 2001, a…

Astrophysics · Physics 2007-05-23 STACEE Collaboration , L. M. Boone , D. Bramel , E. Chae , C. E. Covault , P. Fortin , D. M. Gingrich , D. S. Hanna , J. A. Hinton , R. Mukherjee , C. Mueller , R. A. Ong , K. Ragan , R. A. Scalzo , D. R. Schuette , C. G. Theoret , D. A. Williams

Upper limits from five years of blazar observations with the VERITAS Cherenkov telescopes

Between the beginning of its full-scale scientific operations in 2007 and 2012, the VERITAS Cherenkov telescope array observed more than 130 blazars; of these, 26 were detected as very-high-energy (VHE; E>100 GeV) {\gamma}-ray sources. In…

High Energy Astrophysical Phenomena · Physics 2016-05-25 S. Archambault , A. Archer , W. Benbow , R. Bird , J. Biteau , M. Buchovecky , J. H. Buckley , V. Bugaev , K. Byrum , M. Cerruti , X. Chen , L. Ciupik , M. P. Connolly , W. Cui , J. D. Eisch , M. Errando , A. Falcone , Q. Feng , J. P. Finley , H. Fleischhack , P. Fortin , L. Fortson , A. Furniss , G. H. Gillanders , S. Griffin , J. Grube , G. Gyuk , M. Hütten , N. Hakansson , 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 , T. Nguyen , D. Nieto , A. O'Faoláin De Bhróithe , R. A. Ong , A. N. Otte , N. Park , J. S. Perkins , A. Pichel , M. Pohl , A. Popkow , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , A. C. Rovero , 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 , D. A. Williams , B. Zitzer , M. Fumagalli , J. X. Prochaska

The STACEE Project

The Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) is a telescope designed to explore the gamma-ray sky between 20 and 250 GeV using the atmospheric Cherenkov technique. STACEE is currently under construction. When completed,…

Astrophysics · Physics 2007-05-23 Rene A. Ong , Corbin E. Covault

A Study of the Long-term Spectral Variations of 3C 66A Observed with the Fermi and Kanata Telescopes

3C 66A is an intermediate-frequency-peaked BL Lac object detected by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. We present a study of the long-term variations of this blazar seen over 2 years at GeV energies with…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Ryosuke Itoh , Yasushi Fukazawa , James Chiang , Yoshitaka Hanabata , Masaaki Hayashida , Katsuhiro Hayashi , Tsunefumi Mizuno , Masanori Ohno , Takashi Ohsugi , Jeremy S. Perkins , Silvia Raino , Luis C. Reyes , Hiromitsu Takahashi , Yasuyuki Tanaka , Gino Tosti , Hiroshi Akitaya , Akira Arai , Masaru Kino , Yuki Ikejiri , Koji S. Kawabata , Tomoyuki Komatsu , Kiyoshi Sakimoto , Mahito Sasada , Shuji Sato , Makoto Uemura , Takahiro Ui , Masayuki Yamanaka , Michitoshi Yoshida

The WEBT Campaign on the Intermediate BL Lac Object 3C66A in 2007-2008

Prompted by a high optical state in September 2007, the Whole Earth Blazar Telescope (WEBT) consortium organized an intensive optical, near-IR (JHK) and radio observing campaign on the intermediate BL Lac object 3C 66A throughout the fall…

Astrophysics · Physics 2011-02-11 M. Boettcher , K. Fultz

Discovery of transient high-energy gamma-ray emission from the BL Lacertae object 5C 3.178

We report the serendipitous discovery of transient, point-like high energy gamma-ray emission coincident with the position of the suspected BL Lac object 5C 3.178. The source was detected using the Fermi Large Area Telescope (LAT) at a…

High Energy Astrophysical Phenomena · Physics 2013-04-18 Hugh Dickinson , Christian Farnier

Prototype Test Results of the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE)

There are currently no experiments, either satellite or ground-based, that are sensitive to astrophysical gamma-rays at energies between 20 and 250 GeV. We are developing the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE) to…

Astrophysics · Physics 2015-06-24 STACEE Collaboration

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