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HESS upper limits for Kepler's supernova remnant

  • F. Aharonian
  • , A. G. Akhperjanian
  • , U. Barres De Almeida
  • , A. R. Bazer-Bachi
  • , B. Behera
  • , M. Beilicke
  • , W. Benbow
  • , D. Berge
  • , K. Bernlöhr
  • , C. Boisson
  • , O. Bolz
  • , V. Borrel
  • , I. Braun
  • , E. Brion
  • , J. Brucker
  • , R. Bühler
  • , T. Bulik
  • , I. Büsching
  • , T. Boutelier
  • , S. Carrigan
  • P. M. Chadwick, L. M. Chounet, A. C. Clapson, G. Coignet, R. Cornils, L. Costamante, M. Dalton, B. Degrange, H. J. Dickinson, A. Djannati-Ataï, W. Domainko, L. O.C. Drury, F. Dubois, G. Dubus, J. Dyks, K. Egberts, D. Emmanoulopoulos, P. Espigat, C. Farnier, F. Feinstein, A. Fiasson, A. Förster, G. Fontaine, M. Füßling, Y. A. Gallant, B. Giebels, J. F. Glicenstein, B. Glück, P. Goret, C. Hadjichristidis, D. Hauser, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, A. Hoffmann, W. Hofmann, M. Holleran, S. Hoppe, D. Horns, A. Jacholkowska, O. C. De Jager, I. Jung, K. Katarzyński, E. Kendziorra, M. Kerschhaggl, B. Khélifi, D. Keogh, Nu Komin, K. Kosack, G. Lamanna, I. J. Latham, M. Lemoine-Goumard, J. P. Lenain, T. Lohse, J. M. Martin, O. Martineau-Huynh, A. Marcowith, C. Masterson, D. Maurin, T. J.L. McComb, R. Moderski, E. Moulin, M. Naumann-Godo, M. De Naurois, D. Nedbal, D. Nekrassov, S. J. Nolan, S. Ohm, J. P. Olive, E. De Oña Wilhelmi, K. J. Orford, J. L. Osborne, M. Ostrowski, M. Panter, G. Pedaletti, G. Pelletier, P. O. Petrucci, S. Pita, G. Pühlhofer, M. Punch, A. Quirrenbach, B. C. Raubenheimer, M. Raue, S. M. Rayner, M. Renaud, J. Ripken, L. Rob, S. Rosier-Lees, G. Rowell, B. Rudak, J. Ruppel, V. Sahakian, A. Santangelo, R. Schlickeiser, F. M. Schöck, R. Schröder, U. Schwanke, S. Schwarzburg, S. Schwemmer, A. Shalchi, H. Sol, D. Spangler, Stawarz, R. Steenkamp, C. Stegmann, G. Superina, P. H. Tam, J. P. Tavernet, R. Terrier, C. Van Eldik, G. Vasileiadis, C. Venter, J. P. Vialle, P. Vincent, M. Vivier, H. J. Völk, F. Volpe, S. J. Wagner, M. Ward, A. A. Zdziarski, A. Zech
  • Max-Planck-Institut für Kernphysik
  • Dublin Institute for Advanced Studies
  • Yerevan Physics Institute
  • Durham University
  • CAPES Foundation
  • Centre national de la recherche scientifique
  • Landessternwarte Heidelberg
  • Universität Hamburg
  • European Organization for Nuclear Research
  • Institut für Physik
  • Humboldt-Universität zu Berlin
  • LUTH - Laboratoire de l'Univers et de ses Theories
  • Universite Paris-Saclay
  • Physikalisches Institut
  • Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
  • Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
  • Unit for Space Physics
  • North-West University
  • Université Paris-Sud
  • European Associated Laboratory for Gamma-Ray Astronomy
  • Astroparticule and Cosmol APC
  • Laboratoire Univers et Particules de Montpellier
  • School of Physics and Astronomy
  • University of Leeds
  • Institut für Astronomie und Astrophysik
  • University of Tübingen
  • Toruń Centre for Astronomy
  • Nicolaus Copernicus University
  • UMR 5797
  • Universités Paris VI and VII
  • Charles University
  • Obserwatorium Astronomiczne
  • Jagiellonian University
  • University of Adelaide
  • Institut für Theoretische Physik
  • Ruhr-University Bochum
  • University of Namibia

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Aims. Observations of Kepler's supernova remnant (G4.5+6.8) with the HESS telescope array in 2004 and 2005 with a total live time of 13 h are presented.Methods. Stereoscopic imaging of Cherenkov radiation from extensive air showers is used to reconstruct the energy and direction of the incident gamma rays.Results. No evidence for a very high energy (VHE: $]]>100 GeV) gamma-ray signal from the direction of the remnant is found. An upper limit (99% confidence level) on the energy flux in the range of is obtained.Conclusions. In the context of an existing theoretical model for the remnant, the lack of a detectable gamma-ray flux implies a distance of at least . A corresponding upper limit for the density of the ambient matter of is derived. With this distance limit, and assuming a spectral index , the total energy in accelerated protons is limited to . In the synchrotron/inverse Compton framework, extrapolating the power law measured by RXTE between and down in energy, the predicted gamma-ray flux from inverse Compton scattering is below the measured upper limit for magnetic field values greater than .

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalAstronomy and Astrophysics
Volume488
Issue number1
DOIs
Publication statusPublished - 1 Jan 2008
Externally publishedYes

Keywords

  • Gamma rays: observations
  • ISM: individual objects: Kepler's SNR, SN1604, G4.5+6.8
  • ISM: supernova remnants

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