Veritas observations of a very high energy γ-ray flare from the blazar 3C66A

V. A. Acciari; E. Aliu; T. Arlen; M. Beilicke; W. Benbow; M. Böttcher; 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

doi:10.1088/0004-637X/693/2/L104

Veritas observations of a very high energy γ-ray flare from the blazar 3C66A

V. A. Acciari
, E. Aliu
, T. Arlen
, M. Beilicke
, W. Benbow
, M. Böttcher
, 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

Galway-Mayo Institute of Technology
The Bartol Research Institute
University of California, Los Angeles
Washington University in St. Louis
Center for Astrophysics | Harvard & Smithsonian
Ohio University
University of Leeds
Argonne National Laboratory
University College Dublin
IDA Business Park
Adler Planetarium
McGill University
Purdue University
Durham University
Pennsylvania State University
Barnard College
University of California at Santa Cruz
University of Utah
NASA Goddard Space Flight Center
University of Chicago
Iowa State University
University of Iowa
DePauw University
Pittsburg State University
Anderson University
European Southern Observatory
University of Chicago
Cork Institute of Technology

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The intermediate-frequency peaked BL Lacertae (IBL) object 3C66A is detected during 2007-2008 in VHE (very high energy; E > 100 GeV) γ rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov telescopes. An excess of 1791 events is detected, corresponding to a significance of 21.2 standard deviations (σ), in these observations (32.8 hr live time). The observed integral flux above 200 GeV is 6% of the Crab Nebula's flux and shows evidence for variability on the timescale of days. The measured energy spectrum is characterized by a soft power law with photon index Γ = 4.1 0.4_stat 0.6_sys. The radio galaxy 3C66B is excluded as a possible source of the VHE emission.

langue originale	Anglais
Pages (de - à)	L104-L108
journal	Astrophysical Journal
Volume	693
Numéro de publication	2
Les DOIs	https://doi.org/10.1088/0004-637X/693/2/L104
état	Publié - 1 janv. 2009

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10.1088/0004-637X/693/2/L104

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Acciari, V. A., Aliu, E., Arlen, T., Beilicke, M., Benbow, W., Böttcher, M., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Celik, O., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., Daniel, M. K., ... Zitzer, B. (2009). Veritas observations of a very high energy γ-ray flare from the blazar 3C66A. Astrophysical Journal, 693(2), L104-L108. https://doi.org/10.1088/0004-637X/693/2/L104

@article{e73186d495514a92b600a0b1030aa1b8,

title = "Veritas observations of a very high energy γ-ray flare from the blazar 3C66A",

abstract = "The intermediate-frequency peaked BL Lacertae (IBL) object 3C66A is detected during 2007-2008 in VHE (very high energy; E > 100 GeV) γ rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov telescopes. An excess of 1791 events is detected, corresponding to a significance of 21.2 standard deviations (σ), in these observations (32.8 hr live time). The observed integral flux above 200 GeV is 6\% of the Crab Nebula's flux and shows evidence for variability on the timescale of days. The measured energy spectrum is characterized by a soft power law with photon index Γ = 4.1 0.4stat 0.6sys. The radio galaxy 3C66B is excluded as a possible source of the VHE emission.",

keywords = "BL Lacertae objects: individual (3C 66A), Galaxies: active, Gamma rays: observations",

author = "Acciari, \{V. A.\} and E. Aliu and T. Arlen and M. Beilicke and W. Benbow and M. B{\"o}ttcher and Bradbury, \{S. M.\} and Buckley, \{J. H.\} and V. Bugaev and Y. Butt and K. Byrum and A. Cannon and O. Celik and A. Cesarini and Chow, \{Y. C.\} and L. Ciupik and P. Cogan and W. Cui and Daniel, \{M. K.\} and R. Dickherber and T. Ergin and A. Falcone and Fegan, \{S. J.\} and Finley, \{J. P.\} and P. Fortin and L. Fortson and A. Furniss and D. Gall and K. Gibbs and Gillanders, \{G. H.\} and S. Godambe and J. Grube and R. Guenette and G. Gyuk and D. Hanna and E. Hays and J. Holder and D. Horan and Hui, \{C. M.\} and Humensky, \{T. B.\} and A. Imran and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and J. Kildea and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, \{M. J.\} and S. Lebohec and G. Maier and A. McCann and M. McCutcheon and J. Millis and P. Moriarty and R. Mukherjee and T. Nagai and Ong, \{R. A.\} and Otte, \{A. N.\} and D. Pandel and Perkins, \{J. S.\} and D. Petry and F. Pizlo and M. Pohl and J. Quinn and K. Ragan and Reyes, \{L. C.\} and Reynolds, \{P. T.\} and E. Roache and Rose, \{H. J.\} and M. Schroedter and Sembroski, \{G. H.\} and Smith, \{A. W.\} and D. Steele and Swordy, \{S. P.\} and M. Theiling and Toner, \{J. A.\} and A. Varlotta and Vassiliev, \{V. V.\} and Wagner, \{R. G.\} and Wakely, \{S. P.\} and Ward, \{J. E.\} and Weekes, \{T. C.\} and A. Weinstein and Williams, \{D. A.\} and S. Wissel and M. Wood and B. Zitzer",

year = "2009",

month = jan,

day = "1",

doi = "10.1088/0004-637X/693/2/L104",

language = "English",

volume = "693",

pages = "L104--L108",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "2",

}

Acciari, VA, Aliu, E, Arlen, T, Beilicke, M, Benbow, W, Böttcher, M, Bradbury, SM, Buckley, JH, Bugaev, V, Butt, Y, Byrum, K, Cannon, A, Celik, O, Cesarini, A, Chow, YC, Ciupik, L, Cogan, P, Cui, W, Daniel, MK, Dickherber, R, Ergin, T, Falcone, A, Fegan, SJ, Finley, JP, Fortin, P, Fortson, L, Furniss, A, Gall, D, Gibbs, K, Gillanders, GH, Godambe, S, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Hays, E, Holder, J, Horan, D, Hui, CM, Humensky, TB, Imran, A, Kaaret, P, Karlsson, N, Kertzman, M, Kieda, D, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, Lebohec, S, Maier, G, McCann, A, McCutcheon, M, Millis, J, Moriarty, P, Mukherjee, R, Nagai, T, Ong, RA, Otte, AN, Pandel, D, Perkins, JS, Petry, D, Pizlo, F, Pohl, M, Quinn, J, Ragan, K, Reyes, LC, Reynolds, PT, Roache, E, Rose, HJ, Schroedter, M, Sembroski, GH, Smith, AW, Steele, D, Swordy, SP, Theiling, M, Toner, JA, Varlotta, A, Vassiliev, VV, Wagner, RG, Wakely, SP, Ward, JE, Weekes, TC, Weinstein, A, Williams, DA, Wissel, S, Wood, M & Zitzer, B 2009, 'Veritas observations of a very high energy γ-ray flare from the blazar 3C66A', Astrophysical Journal, VOL. 693, Numéro 2, p. L104-L108. https://doi.org/10.1088/0004-637X/693/2/L104

TY - JOUR

T1 - Veritas observations of a very high energy γ-ray flare from the blazar 3C66A

AU - Acciari, V. A.

AU - Aliu, E.

AU - Arlen, T.

AU - Beilicke, M.

AU - Benbow, W.

AU - Böttcher, M.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Butt, Y.

AU - Byrum, K.

AU - Cannon, A.

AU - Celik, O.

AU - Cesarini, A.

AU - Chow, Y. C.

AU - Ciupik, L.

AU - Cogan, P.

AU - Cui, W.

AU - Daniel, M. K.

AU - Dickherber, R.

AU - Ergin, T.

AU - Falcone, A.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L.

AU - Furniss, A.

AU - Gall, D.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Godambe, S.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Hays, E.

AU - Holder, J.

AU - Horan, D.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Imran, A.

AU - Kaaret, P.

AU - Karlsson, N.

AU - Kertzman, M.

AU - Kieda, D.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Lebohec, S.

AU - Maier, G.

AU - McCann, A.

AU - McCutcheon, M.

AU - Millis, J.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Nagai, T.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Pandel, D.

AU - Perkins, J. S.

AU - Petry, D.

AU - Pizlo, F.

AU - Pohl, M.

AU - Quinn, J.

AU - Ragan, K.

AU - Reyes, L. C.

AU - Reynolds, P. T.

AU - Roache, E.

AU - Rose, H. J.

AU - Schroedter, M.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Steele, D.

AU - Swordy, S. P.

AU - Theiling, M.

AU - Toner, J. A.

AU - Varlotta, A.

AU - Vassiliev, V. V.

AU - Wagner, R. G.

AU - Wakely, S. P.

AU - Ward, J. E.

AU - Weekes, T. C.

AU - Weinstein, A.

AU - Williams, D. A.

AU - Wissel, S.

AU - Wood, M.

AU - Zitzer, B.

PY - 2009/1/1

Y1 - 2009/1/1

N2 - The intermediate-frequency peaked BL Lacertae (IBL) object 3C66A is detected during 2007-2008 in VHE (very high energy; E > 100 GeV) γ rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov telescopes. An excess of 1791 events is detected, corresponding to a significance of 21.2 standard deviations (σ), in these observations (32.8 hr live time). The observed integral flux above 200 GeV is 6% of the Crab Nebula's flux and shows evidence for variability on the timescale of days. The measured energy spectrum is characterized by a soft power law with photon index Γ = 4.1 0.4stat 0.6sys. The radio galaxy 3C66B is excluded as a possible source of the VHE emission.

AB - The intermediate-frequency peaked BL Lacertae (IBL) object 3C66A is detected during 2007-2008 in VHE (very high energy; E > 100 GeV) γ rays with the VERITAS stereoscopic array of imaging atmospheric Cherenkov telescopes. An excess of 1791 events is detected, corresponding to a significance of 21.2 standard deviations (σ), in these observations (32.8 hr live time). The observed integral flux above 200 GeV is 6% of the Crab Nebula's flux and shows evidence for variability on the timescale of days. The measured energy spectrum is characterized by a soft power law with photon index Γ = 4.1 0.4stat 0.6sys. The radio galaxy 3C66B is excluded as a possible source of the VHE emission.

KW - BL Lacertae objects: individual (3C 66A)

KW - Galaxies: active

KW - Gamma rays: observations

UR - https://www.scopus.com/pages/publications/64849092339

U2 - 10.1088/0004-637X/693/2/L104

DO - 10.1088/0004-637X/693/2/L104

M3 - Article

AN - SCOPUS:64849092339

SN - 0004-637X

VL - 693

SP - L104-L108

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Veritas observations of a very high energy γ-ray flare from the blazar 3C66A

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