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Serendipitous discovery of the unidentified extended TeV γ-ray source HESS J1303-631

  • F. Aharonian
  • , A. G. Akhperjanian
  • , K. M. Aye
  • , A. R. Bazer-Bachi
  • , M. Beilicke
  • , W. Benbow
  • , D. Berge
  • , P. Berghaus
  • , K. Bernlöhr
  • , C. Boisson
  • , O. Bolz
  • , I. Braun
  • , F. Breitling
  • , A. M. Brown
  • , J. Bussons Gordo
  • , P. M. Chadwick
  • , L. M. Chounet
  • , R. Cornils
  • , L. Costamante
  • , B. Degrange
  • A. Djannati-Ataï, L. O.C. Drury, G. Dubus, D. Emmanoulopoulos, P. Espigat, F. Feinstein, P. Fleury, G. Fontaine, Y. Fuchs, S. Funk, Y. A. Gallant, B. Giebels, S. Gillessen, J. F. Glicenstein, P. Goret, C. Hadjichristidis, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, M. Holleran, D. Horns, O. C. de Jager, B. Khélifi, N. Komin, A. Konopelko, I. J. Latham, R. le Gallou, A. Lemière, M. Lemoine-Goumard, N. Leroy, T. Lohse, O. Martineau-Huynh, A. Marcowith, C. Masterson, T. J.L. McComb, M. de Naurois, S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, M. Ouchrif, M. Panter, G. Pelletier, S. Pita, G. Pühlhofer, M. Punch, B. C. Raubenheimer, M. Raue, J. Raux, S. M. Rayner, I. Redondo, A. Reimer, O. Reimer, J. Ripken, L. Rob, L. Rolland, G. Rowell, V. Sahakian, L. Saugé, S. Schlenker, R. Schlickeiser, C. Schuster, U. Schwanke, M. Siewert, H. Sol, R. Steenkamp, C. Stegmann, J. P. Tavernet, R. Terrier, C. G. Théoret, M. Tluczykont, D. J. van der Walt, G. Vasileiadis, C. Venter, P. Vincent, H. J. Völk, S. J. Wagner
  • Max-Planck-Institut für Kernphysik
  • Yerevan Physics Institute
  • Durham University
  • CNRS
  • Universität Hamburg
  • Astroparticule and Cosmol APC
  • Université Libre de Bruxelles
  • Humboldt-Universität zu Berlin
  • Sorbonne Univ.
  • Laboratoire Univers et Particules de Montpellier
  • European Associated Laboratory for Gamma-Ray Astronomy
  • Dublin Institute for Advanced Studies
  • Landessternwarte Heidelberg
  • Institut Pierre Simon Laplace, CNRS and CEA
  • North-West University
  • Universités Paris VI and VII
  • The University of Sheffield
  • Ruhr-University Bochum
  • Charles University
  • University of Namibia

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The serendipitous discovery of an unidentified extended TeV γ-ray source close to the galactic plane named HESS J1303-631 at a significance of 21 standard deviations is reported. The observations were performed between February and June 2004 with the HESS stereoscopic system of Cherenkov telescopes in Namibia. HESS J1303-631 was discovered roughly 0.6° north of the binary system PSR B1259-63/SS 2883, the target object of the initial observation campaign which was also detected at TeV energies in the same field of view. HESS J1303-631 is extended with a width of an assumed intrinsic Gaussian emission profile of σ = (0.16 ± 0.02)° and the integral flux above 380 GeV is compatible with constant emission over the entire observational period of (17 ± 3)% of the Crab Nebula flux. The measured energy spectrum can be described by a power-law dN/dE ∼ E with a photon index of Γ = 2.44 ±0.05stat ± 0.2syst. Up to now, no counterpart at other wavelengths is identified. Various possible TeV production scenarios are discussed.

langue originaleAnglais
Pages (de - à)1013-1021
Nombre de pages9
journalAstronomy and Astrophysics
Volume439
Numéro de publication3
Les DOIs
étatPublié - 1 sept. 2005
Modification externeOui

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