Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS

V. A. Acciar; M. Beilicke; G. Blaylock; S. M. Bradbury; J. H. Buckley; V. Bugaev; Y. Butt; O. Celik; A. Cesarini; L. Ciupik; P. Cogan; P. Colin; W. Cui; M. K. Daniel; C. Duke; T. Ergin; A. D. Falcone; S. J. Fegan; J. P. Finley; G. Finnegan; P. Fortin; L. F. Fortson; K. Gibbs; G. H. Gillanders; J. Grube; R. Guenette; G. Gyuk; D. Hanna; E. Hays; J. Holder; D. Horan; S. B. Hughes; M. C. Hui; T. B. Humensky; A. Imran; P. Kaaret; M. Kertzman; 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; 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; A. Syson; J. A. Toner; L. Valcarcel; V. V. Vassiliev; S. P. Wakely; J. E. Ward; T. C. Weekes; A. Weinstein; R. J. White; D. A. Williams; S. A. Wissel; M. D. Wood; B. Zitzer

doi:10.1086/587458

Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS

V. A. Acciar
, M. Beilicke
, G. Blaylock
, S. M. Bradbury
, J. H. Buckley
, V. Bugaev
, Y. Butt
, O. Celik
, A. Cesarini
, L. Ciupik
, P. Cogan
, P. Colin
, W. Cui
, M. K. Daniel
, C. Duke
, T. Ergin
, A. D. Falcone
, S. J. Fegan
, J. P. Finley
, G. Finnegan

P. Fortin, L. F. Fortson, K. Gibbs, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, S. B. Hughes, M. C. Hui, T. B. Humensky, A. Imran, P. Kaaret, M. Kertzman, 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, 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, A. Syson, J. A. Toner, L. Valcarcel, V. V. Vassiliev, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, R. J. White, D. A. Williams, S. A. Wissel, M. D. Wood, B. Zitzer

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

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

Résumé

The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV γ-rays. Here we report the detection of γ-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cerenkov telescope array and discuss its correlation with the X-ray emission. The γ-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5′. The differential energy spectrum is fitted well by a power-law function: dΦ/dE = (7.4 ± 1.3_stat ± 1.5_sys)(£/TeV) _{(-2.31±0.17stat±0.2sys)}10^-9 m^-2 s^-1 TeV^-1. We show strong evidence for a year-scale correlation between the γ-ray flux reported by TeV experiments and the X-ray emission measured by the ASM RXTE observatory, and discuss the possible short-timescale variability. These results imply that the γ-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet.

langue originale	Anglais
Pages (de - à)	397-403
Nombre de pages	7
journal	Astrophysical Journal
Volume	679
Numéro de publication	1
Les DOIs	https://doi.org/10.1086/587458
état	Publié - 20 mai 2008
Modification externe	Oui

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10.1086/587458

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Acciar, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Celik, O., Cesarini, A., Ciupik, L., Cogan, P., Colin, P., Cui, W., Daniel, M. K., Duke, C., Ergin, T., Falcone, A. D., Fegan, S. J., Finley, J. P., ... Zitzer, B. (2008). Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS. Astrophysical Journal, 679(1), 397-403. https://doi.org/10.1086/587458

@article{270b54f6276e499e98c1728e12aea9f6,

title = "Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS",

abstract = "The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV γ-rays. Here we report the detection of γ-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cerenkov telescope array and discuss its correlation with the X-ray emission. The γ-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5′. The differential energy spectrum is fitted well by a power-law function: dΦ/dE = (7.4 ± 1.3stat ± 1.5sys)(£/TeV) (-2.31±0.17stat±0.2sys)10-9 m-2 s-1 TeV-1. We show strong evidence for a year-scale correlation between the γ-ray flux reported by TeV experiments and the X-ray emission measured by the ASM RXTE observatory, and discuss the possible short-timescale variability. These results imply that the γ-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet.",

keywords = "Galaxies: individual (M87, NGC 4486, Virgo A), Gamma rays: observations",

author = "Acciar, \{V. A.\} and M. Beilicke and G. Blaylock and Bradbury, \{S. M.\} and Buckley, \{J. H.\} and V. Bugaev and Y. Butt and O. Celik and A. Cesarini and L. Ciupik and P. Cogan and P. Colin and W. Cui and Daniel, \{M. K.\} and C. Duke and T. Ergin and Falcone, \{A. D.\} and Fegan, \{S. J.\} and Finley, \{J. P.\} and G. Finnegan and P. Fortin and Fortson, \{L. F.\} and K. Gibbs and Gillanders, \{G. H.\} and J. Grube and R. Guenette and G. Gyuk and D. Hanna and E. Hays and J. Holder and D. Horan and Hughes, \{S. B.\} and Hui, \{M. C.\} and Humensky, \{T. B.\} and A. Imran and P. Kaaret and M. Kertzman and Kieda, \{D. B.\} and J. Kildea and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, \{M. J.\} and S. LeBohec and K. Lee 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 D. Pandel and Perkins, \{J. S.\} and M. Pohl and J. Quinn and K. Ragan and Reynolds, \{P. T.\} and Rose, \{H. J.\} and M. Schroedter and Sembroski, \{G. H.\} and Smith, \{A. W.\} and D. Steele and Swordy, \{S. P.\} and A. Syson and Toner, \{J. A.\} and L. Valcarcel and Vassiliev, \{V. V.\} and Wakely, \{S. P.\} and Ward, \{J. E.\} and Weekes, \{T. C.\} and A. Weinstein and White, \{R. J.\} and Williams, \{D. A.\} and Wissel, \{S. A.\} and Wood, \{M. D.\} and B. Zitzer",

year = "2008",

month = may,

day = "20",

doi = "10.1086/587458",

language = "English",

volume = "679",

pages = "397--403",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1",

}

Acciar, VA, Beilicke, M, Blaylock, G, Bradbury, SM, Buckley, JH, Bugaev, V, Butt, Y, Celik, O, Cesarini, A, Ciupik, L, Cogan, P, Colin, P, Cui, W, Daniel, MK, Duke, C, Ergin, T, Falcone, AD, Fegan, SJ, Finley, JP, Finnegan, G, Fortin, P, Fortson, LF, Gibbs, K, Gillanders, GH, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Hays, E, Holder, J, Horan, D, Hughes, SB, Hui, MC, Humensky, TB, Imran, A, Kaaret, P, Kertzman, M, Kieda, DB, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, LeBohec, S, Lee, K, Maier, G, McCann, A, McCutcheon, M, Millis, J, Moriarty, P, Mukherjee, R, Nagai, T, Ong, RA, Pandel, D, Perkins, JS, Pohl, M, Quinn, J, Ragan, K, Reynolds, PT, Rose, HJ, Schroedter, M, Sembroski, GH, Smith, AW, Steele, D, Swordy, SP, Syson, A, Toner, JA, Valcarcel, L, Vassiliev, VV, Wakely, SP, Ward, JE, Weekes, TC, Weinstein, A, White, RJ, Williams, DA, Wissel, SA, Wood, MD & Zitzer, B 2008, 'Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS', Astrophysical Journal, VOL. 679, Numéro 1, p. 397-403. https://doi.org/10.1086/587458

TY - JOUR

T1 - Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS

AU - Acciar, V. A.

AU - Beilicke, M.

AU - Blaylock, G.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Butt, Y.

AU - Celik, O.

AU - Cesarini, A.

AU - Ciupik, L.

AU - Cogan, P.

AU - Colin, P.

AU - Cui, W.

AU - Daniel, M. K.

AU - Duke, C.

AU - Ergin, T.

AU - Falcone, A. D.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Finnegan, G.

AU - Fortin, P.

AU - Fortson, L. F.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Hays, E.

AU - Holder, J.

AU - Horan, D.

AU - Hughes, S. B.

AU - Hui, M. C.

AU - Humensky, T. B.

AU - Imran, A.

AU - Kaaret, P.

AU - Kertzman, M.

AU - Kieda, D. B.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - LeBohec, S.

AU - Lee, K.

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 - Pandel, D.

AU - Perkins, J. S.

AU - Pohl, M.

AU - Quinn, J.

AU - Ragan, K.

AU - Reynolds, P. T.

AU - Rose, H. J.

AU - Schroedter, M.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Steele, D.

AU - Swordy, S. P.

AU - Syson, A.

AU - Toner, J. A.

AU - Valcarcel, L.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Ward, J. E.

AU - Weekes, T. C.

AU - Weinstein, A.

AU - White, R. J.

AU - Williams, D. A.

AU - Wissel, S. A.

AU - Wood, M. D.

AU - Zitzer, B.

PY - 2008/5/20

Y1 - 2008/5/20

N2 - The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV γ-rays. Here we report the detection of γ-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cerenkov telescope array and discuss its correlation with the X-ray emission. The γ-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5′. The differential energy spectrum is fitted well by a power-law function: dΦ/dE = (7.4 ± 1.3stat ± 1.5sys)(£/TeV) (-2.31±0.17stat±0.2sys)10-9 m-2 s-1 TeV-1. We show strong evidence for a year-scale correlation between the γ-ray flux reported by TeV experiments and the X-ray emission measured by the ASM RXTE observatory, and discuss the possible short-timescale variability. These results imply that the γ-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet.

AB - The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in active galactic nuclei from radio waves to TeV γ-rays. Here we report the detection of γ-ray emission above 250 GeV from M87 in spring 2007 with the VERITAS atmospheric Cerenkov telescope array and discuss its correlation with the X-ray emission. The γ-ray emission is measured to be pointlike with an intrinsic source radius less than 4.5′. The differential energy spectrum is fitted well by a power-law function: dΦ/dE = (7.4 ± 1.3stat ± 1.5sys)(£/TeV) (-2.31±0.17stat±0.2sys)10-9 m-2 s-1 TeV-1. We show strong evidence for a year-scale correlation between the γ-ray flux reported by TeV experiments and the X-ray emission measured by the ASM RXTE observatory, and discuss the possible short-timescale variability. These results imply that the γ-ray emission from M87 is more likely associated with the core of the galaxy than with other bright X-ray features in the jet.

KW - Galaxies: individual (M87, NGC 4486, Virgo A)

KW - Gamma rays: observations

UR - https://www.scopus.com/pages/publications/43949102695

U2 - 10.1086/587458

DO - 10.1086/587458

M3 - Article

AN - SCOPUS:43949102695

SN - 0004-637X

VL - 679

SP - 397

EP - 403

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS

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