Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas

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. Cannon; A. Cesarini; Y. C. Chow; L. Ciupik; P. Cogan; W. Cui; R. Dickherber; C. Duke; T. Ergin; S. J. Fegan; J. P. Finley; G. Finnegan; P. Fortin; L. Fortson; A. Furniss; N. Galante; D. Gall; G. H. Gillanders; J. Grube; R. Guenette; G. Gyuk; D. Hanna; J. Holder; D. Huang; C. M. Hui; T. B. Humensky; P. Kaaret; N. Karlsson; M. Kertzman; D. Kieda; A. Konopelko; H. Krawczynski; F. Krennrich; M. J. Lang; S. Lebohec; G. Maier; S. McArthur

doi:10.1088/0004-637X/714/1/163

Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas

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. Cannon, A. Cesarini, Y. C. Chow, L. Ciupik, P. Cogan, W. Cui, R. DickherberC. Duke, T. Ergin, S. J. Fegan, J. P. Finley, G. Finnegan, P. Fortin, L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, J. Holder, D. Huang, C. M. Hui, T. B. Humensky, P. Kaaret, N. Karlsson, M. Kertzman, D. Kieda, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. Lebohec, G. Maier, S. McArthur

Physics and Astronomy (Twin Cities)

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Abstract

We report on observations of very high energy γ rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The γ-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3σ. The estimated integral flux for this γ-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE E ^-Γ with an index Γ = 2.61 0.24_stat 0.2_sys. The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed γ-ray emission.

Original language	English (US)
Pages (from-to)	163-169
Number of pages	7
Journal	Astrophysical Journal
Volume	714
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/714/1/163
State	Published - 2010

Keywords

Acceleration of particles
Cosmic rays
Gamma rays: ISM
ISM: individual objects (Cassiopeia A)
ISM: supernova remnants

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Acciari, V. A., Aliu, E., Arlen, T., Aune, T., Bautista, M., Beilicke, M., Benbow, W., Boltuch, D., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K., Cannon, A., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Cui, W., ... McArthur, S. (2010). Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas. Astrophysical Journal, 714(1), 163-169. https://doi.org/10.1088/0004-637X/714/1/163

Acciari, VA, Aliu, E, Arlen, T, Aune, T, Bautista, M, Beilicke, M, Benbow, W, Boltuch, D, Bradbury, SM, Buckley, JH, Bugaev, V, Butt, Y, Byrum, K, Cannon, A, Cesarini, A, Chow, YC, Ciupik, L, Cogan, P, Cui, W, Dickherber, R, Duke, C, Ergin, T, Fegan, SJ, Finley, JP, Finnegan, G, Fortin, P, Fortson, L, Furniss, A, Galante, N, Gall, D, Gillanders, GH, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Holder, J, Huang, D, Hui, CM, Humensky, TB, Kaaret, P, Karlsson, N, Kertzman, M, Kieda, D, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, Lebohec, S, Maier, G & McArthur, S 2010, 'Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas', Astrophysical Journal, vol. 714, no. 1, pp. 163-169. https://doi.org/10.1088/0004-637X/714/1/163

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title = "Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas",

abstract = "We report on observations of very high energy γ rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The γ-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3σ. The estimated integral flux for this γ-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE E -Γ with an index Γ = 2.61 0.24stat 0.2sys. The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed γ-ray emission.",

keywords = "Acceleration of particles, Cosmic rays, Gamma rays: ISM, ISM: individual objects (Cassiopeia A), ISM: supernova remnants",

author = "Acciari, {V. A.} and E. Aliu and T. Arlen and T. Aune and M. Bautista and M. Beilicke and W. Benbow and D. Boltuch and Bradbury, {S. M.} and Buckley, {J. H.} and V. Bugaev and Y. Butt and K. Byrum and A. Cannon and A. Cesarini and Chow, {Y. C.} and L. Ciupik and P. Cogan and W. Cui and R. Dickherber and C. Duke and T. Ergin and Fegan, {S. J.} and Finley, {J. P.} and G. Finnegan and P. Fortin and L. Fortson and A. Furniss and N. Galante and D. Gall and Gillanders, {G. H.} and J. Grube and R. Guenette and G. Gyuk and D. Hanna and J. Holder and D. Huang and Hui, {C. M.} and Humensky, {T. B.} and P. Kaaret and N. Karlsson and M. Kertzman and D. Kieda and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, {M. J.} and S. Lebohec and G. Maier and S. McArthur",

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doi = "10.1088/0004-637X/714/1/163",

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T1 - Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas

AU - Acciari, V. A.

AU - Aliu, E.

AU - Arlen, T.

AU - Aune, T.

AU - Bautista, M.

AU - Beilicke, M.

AU - Benbow, W.

AU - Boltuch, D.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Butt, Y.

AU - Byrum, K.

AU - Cannon, A.

AU - Cesarini, A.

AU - Chow, Y. C.

AU - Ciupik, L.

AU - Cogan, P.

AU - Cui, W.

AU - Dickherber, R.

AU - Duke, C.

AU - Ergin, T.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Finnegan, G.

AU - Fortin, P.

AU - Fortson, L.

AU - Furniss, A.

AU - Galante, N.

AU - Gall, D.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Holder, J.

AU - Huang, D.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Kaaret, P.

AU - Karlsson, N.

AU - Kertzman, M.

AU - Kieda, D.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Lebohec, S.

AU - Maier, G.

AU - McArthur, S.

PY - 2010

Y1 - 2010

N2 - We report on observations of very high energy γ rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The γ-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3σ. The estimated integral flux for this γ-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE E -Γ with an index Γ = 2.61 0.24stat 0.2sys. The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed γ-ray emission.

AB - We report on observations of very high energy γ rays from the shell-type supernova remnant (SNR) Cassiopeia A with the Very Energetic Radiation Imaging Telescope Array System stereoscopic array of four imaging atmospheric Cherenkov telescopes in Arizona. The total exposure time for these observations is 22 hr, accumulated between September and November of 2007. The γ-ray source associated with the SNR Cassiopeia A was detected above 200 GeV with a statistical significance of 8.3σ. The estimated integral flux for this γ-ray source is about 3% of the Crab-Nebula flux. The photon spectrum is compatible with a power law dN/dE E -Γ with an index Γ = 2.61 0.24stat 0.2sys. The data are consistent with a point-like source. We provide a detailed description of the analysis results and discuss physical mechanisms that may be responsible for the observed γ-ray emission.

KW - Acceleration of particles

KW - Cosmic rays

KW - Gamma rays: ISM

KW - ISM: individual objects (Cassiopeia A)

KW - ISM: supernova remnants

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U2 - 10.1088/0004-637X/714/1/163

DO - 10.1088/0004-637X/714/1/163

M3 - Article

AN - SCOPUS:77951111171

SN - 0004-637X

VL - 714

SP - 163

EP - 169

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Observations of the shell-type supernova remnant cassiopeia a at TeV energies with veritas

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