Evidence for TeV gamma ray emission from Cassiopeia A

F. Aharonian; A. Akhperjanian; J. Barrio; K. Bernlöhr; H. Börst; H. Bojahr; O. Bolz; J. Contreras; J. Cortina; S. Denninghoff; V. Fonseca; J. Gonzalez; N. Götting; G. Heinzelmann; G. Hermann; A. Heusler; W. Hofmann; D. Horns; A. Ibarra; C. Iserlohe; I. Jung; R. Kankanyan; M. Kestel; J. Kettler; A. Kohnle; A. Konopelko; H. Kornmeyer; D. Kranich; H. Krawczynski; H. Lampeitl; M. Lopez; E. Lorenz; F. Lucarelli; N. Magnussen; O. Mang; H. Meyer; R. Mirzoyan; A. Moralejo; E. Ona; L. Padilla; M. Panter; R. Plaga; A. Plyasheshnikov; J. Prahl; G. Pühlhofer; G. Rauterberg; A. Röhring; W. Rhode; G. P. Rowell; V. Sahakian; M. Samorski; M. Schilling; F. Schröder; M. Siems; W. Stamm; M. Tluczykont; H. J. Völk; C. A. Wiedner; W. Wittek

doi:10.1051/0004-6361:20010243

Evidence for TeV gamma ray emission from Cassiopeia A

F. Aharonian, A. Akhperjanian, J. Barrio, K. Bernlöhr, H. Börst, H. Bojahr, O. Bolz, J. Contreras, J. Cortina, S. Denninghoff, V. Fonseca, J. Gonzalez, N. Götting, G. Heinzelmann, G. Hermann, A. Heusler, W. Hofmann, D. Horns, A. Ibarra, C. IserloheI. Jung, R. Kankanyan, M. Kestel, J. Kettler, A. Kohnle, A. Konopelko, H. Kornmeyer, D. Kranich, H. Krawczynski, H. Lampeitl, M. Lopez, E. Lorenz, F. Lucarelli, N. Magnussen, O. Mang, H. Meyer, R. Mirzoyan, A. Moralejo, E. Ona, L. Padilla, M. Panter, R. Plaga, A. Plyasheshnikov, J. Prahl, G. Pühlhofer, G. Rauterberg, A. Röhring, W. Rhode, G. P. Rowell, V. Sahakian, M. Samorski, M. Schilling, F. Schröder, M. Siems, W. Stamm, M. Tluczykont, H. J. Völk, C. A. Wiedner, W. Wittek

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Abstract

232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV γ-ray emission was detected at the 5 σ level, and a flux of (5.8 ± 1.2_stat ± 1.2_syst) 10^-9 ph m^-2 s^-1 above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 ± 0.4_stat ± 0.1_syst between 1 and 10TeV. As this is the first report of the detection of a TeV γ-ray source on the "centi-Crab" scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. We discuss some important aspects in this paper.

Original language	English
Pages (from-to)	112-120
Number of pages	9
Journal	Astronomy and Astrophysics
Volume	370
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:20010243
State	Published - 2001

Keywords

Cosmic rays
Gamma rays: observations
ISM: individual objects: Cassiopeia A
ISM: supernova remnants

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Aharonian, F., Akhperjanian, A., Barrio, J., Bernlöhr, K., Börst, H., Bojahr, H., Bolz, O., Contreras, J., Cortina, J., Denninghoff, S., Fonseca, V., Gonzalez, J., Götting, N., Heinzelmann, G., Hermann, G., Heusler, A., Hofmann, W., Horns, D., Ibarra, A., ... Wittek, W. (2001). Evidence for TeV gamma ray emission from Cassiopeia A. Astronomy and Astrophysics, 370(1), 112-120. https://doi.org/10.1051/0004-6361:20010243

@article{dab509fbda0f46108bda1de25fcdcc84,

title = "Evidence for TeV gamma ray emission from Cassiopeia A",

abstract = "232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV γ-ray emission was detected at the 5 σ level, and a flux of (5.8 ± 1.2stat ± 1.2syst) 10-9 ph m-2 s-1 above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 ± 0.4stat ± 0.1syst between 1 and 10TeV. As this is the first report of the detection of a TeV γ-ray source on the {"}centi-Crab{"} scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. We discuss some important aspects in this paper.",

keywords = "Cosmic rays, Gamma rays: observations, ISM: individual objects: Cassiopeia A, ISM: supernova remnants",

author = "F. Aharonian and A. Akhperjanian and J. Barrio and K. Bernl{\"o}hr and H. B{\"o}rst and H. Bojahr and O. Bolz and J. Contreras and J. Cortina and S. Denninghoff and V. Fonseca and J. Gonzalez and N. G{\"o}tting and G. Heinzelmann and G. Hermann and A. Heusler and W. Hofmann and D. Horns and A. Ibarra and C. Iserlohe and I. Jung and R. Kankanyan and M. Kestel and J. Kettler and A. Kohnle and A. Konopelko and H. Kornmeyer and D. Kranich and H. Krawczynski and H. Lampeitl and M. Lopez and E. Lorenz and F. Lucarelli and N. Magnussen and O. Mang and H. Meyer and R. Mirzoyan and A. Moralejo and E. Ona and L. Padilla and M. Panter and R. Plaga and A. Plyasheshnikov and J. Prahl and G. P{\"u}hlhofer and G. Rauterberg and A. R{\"o}hring and W. Rhode and Rowell, {G. P.} and V. Sahakian and M. Samorski and M. Schilling and F. Schr{\"o}der and M. Siems and W. Stamm and M. Tluczykont and V{\"o}lk, {H. J.} and Wiedner, {C. A.} and W. Wittek",

year = "2001",

doi = "10.1051/0004-6361:20010243",

language = "English",

volume = "370",

pages = "112--120",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

number = "1",

}

Aharonian, F, Akhperjanian, A, Barrio, J, Bernlöhr, K, Börst, H, Bojahr, H, Bolz, O, Contreras, J, Cortina, J, Denninghoff, S, Fonseca, V, Gonzalez, J, Götting, N, Heinzelmann, G, Hermann, G, Heusler, A, Hofmann, W, Horns, D, Ibarra, A, Iserlohe, C, Jung, I, Kankanyan, R, Kestel, M, Kettler, J, Kohnle, A, Konopelko, A, Kornmeyer, H, Kranich, D, Krawczynski, H, Lampeitl, H, Lopez, M, Lorenz, E, Lucarelli, F, Magnussen, N, Mang, O, Meyer, H, Mirzoyan, R, Moralejo, A, Ona, E, Padilla, L, Panter, M, Plaga, R, Plyasheshnikov, A, Prahl, J, Pühlhofer, G, Rauterberg, G, Röhring, A, Rhode, W, Rowell, GP, Sahakian, V, Samorski, M, Schilling, M, Schröder, F, Siems, M, Stamm, W, Tluczykont, M, Völk, HJ, Wiedner, CA & Wittek, W 2001, 'Evidence for TeV gamma ray emission from Cassiopeia A', Astronomy and Astrophysics, vol. 370, no. 1, pp. 112-120. https://doi.org/10.1051/0004-6361:20010243

TY - JOUR

T1 - Evidence for TeV gamma ray emission from Cassiopeia A

AU - Aharonian, F.

AU - Akhperjanian, A.

AU - Barrio, J.

AU - Bernlöhr, K.

AU - Börst, H.

AU - Bojahr, H.

AU - Bolz, O.

AU - Contreras, J.

AU - Cortina, J.

AU - Denninghoff, S.

AU - Fonseca, V.

AU - Gonzalez, J.

AU - Götting, N.

AU - Heinzelmann, G.

AU - Hermann, G.

AU - Heusler, A.

AU - Hofmann, W.

AU - Horns, D.

AU - Ibarra, A.

AU - Iserlohe, C.

AU - Jung, I.

AU - Kankanyan, R.

AU - Kestel, M.

AU - Kettler, J.

AU - Kohnle, A.

AU - Konopelko, A.

AU - Kornmeyer, H.

AU - Kranich, D.

AU - Krawczynski, H.

AU - Lampeitl, H.

AU - Lopez, M.

AU - Lorenz, E.

AU - Lucarelli, F.

AU - Magnussen, N.

AU - Mang, O.

AU - Meyer, H.

AU - Mirzoyan, R.

AU - Moralejo, A.

AU - Ona, E.

AU - Padilla, L.

AU - Panter, M.

AU - Plaga, R.

AU - Plyasheshnikov, A.

AU - Prahl, J.

AU - Pühlhofer, G.

AU - Rauterberg, G.

AU - Röhring, A.

AU - Rhode, W.

AU - Rowell, G. P.

AU - Sahakian, V.

AU - Samorski, M.

AU - Schilling, M.

AU - Schröder, F.

AU - Siems, M.

AU - Stamm, W.

AU - Tluczykont, M.

AU - Völk, H. J.

AU - Wiedner, C. A.

AU - Wittek, W.

PY - 2001

Y1 - 2001

N2 - 232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV γ-ray emission was detected at the 5 σ level, and a flux of (5.8 ± 1.2stat ± 1.2syst) 10-9 ph m-2 s-1 above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 ± 0.4stat ± 0.1syst between 1 and 10TeV. As this is the first report of the detection of a TeV γ-ray source on the "centi-Crab" scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. We discuss some important aspects in this paper.

AB - 232 hours of data were accumulated from 1997 to 1999, using the HEGRA Stereoscopic Cherenkov Telescope System to observe the supernova remnant Cassiopeia A. TeV γ-ray emission was detected at the 5 σ level, and a flux of (5.8 ± 1.2stat ± 1.2syst) 10-9 ph m-2 s-1 above 1 TeV was derived. The spectral distribution is consistent with a power law with a differential spectral index of -2.5 ± 0.4stat ± 0.1syst between 1 and 10TeV. As this is the first report of the detection of a TeV γ-ray source on the "centi-Crab" scale, we present the analysis in some detail. Implications for the acceleration of cosmic rays depend on the details of the source modeling. We discuss some important aspects in this paper.

KW - Cosmic rays

KW - Gamma rays: observations

KW - ISM: individual objects: Cassiopeia A

KW - ISM: supernova remnants

UR - http://www.scopus.com/inward/record.url?scp=0035314738&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20010243

DO - 10.1051/0004-6361:20010243

M3 - Article

AN - SCOPUS:0035314738

SN - 0004-6361

VL - 370

SP - 112

EP - 120

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

Evidence for TeV gamma ray emission from Cassiopeia A

Abstract

Keywords

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