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- Aharonian, F. (author)
Discovery of very high energy γ-ray emission from centaurus a with H.E.S.S.
- Article/chapterEnglish2009
Publisher, publication year, extent ...
- Institute of Physics (IOP),2009
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:lnu-30268
- https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30268URI
- https://doi.org/10.1088/0004-637X/695/1/L40DOI
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- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- We report the discovery of faint very high energy (VHE; E > 100 GeV) gamma-ray emission from the radio galaxy Centaurus A in observations performed with the High Energy Stereoscopic System (H.E.S.S.) experiment, an imaging atmospheric Cherenkov telescope array consisting of four telescopes located in Namibia. Centaurus A has been observed for more than 120 hr. A signal with a statistical significance of 5.0 sigma is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of similar to 250 GeV is measured to be 0.8% of the flux of the Crab Nebula (apparent luminosity: L(> 250 GeV) approximate to 2.6 x 1039 erg s(-1), adopting a distance of 3.8 Mpc). The spectrum can be described by a power law with a photon index of 2.7 +/- 0.5(stat) +/- 0.2(sys). No significant flux variability is detected in the data set. However, the low flux only allows detection of variability on the timescale of days to flux increments above a factor of similar to 15-20 (3 sigma and 4 sigma, respectively). The discovery of VHE gamma-ray emission from Centaurus A reveals particle acceleration in the source to > TeV energies and, together with M 87, establishes radio galaxies as a class of VHE emitters.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- galaxies: active
- galaxies: individual (Cen A)
- gamma rays: observations
- Astroparticle Physics
- Astropartikelfysik
Added entries (persons, corporate bodies, meetings, titles ...)
- Akhperjanian, A. G. (author)
- Anton, G. (author)
- de Almeida, U. Barres (author)
- Bazer-Bachi, A. R. (author)
- Becherini, YvonneUniversite Paris 7 Denis Diderot(Swepub:lnu)yvbeaa (author)
- Behera, B. (author)
- Benbow, W. (author)
- Bernloehr, K. (author)
- Boisson, C. (author)
- Bochow, A. (author)
- Borrel, V. (author)
- Brion, E. (author)
- Brucker, J. (author)
- Brun, P. (author)
- Buehler, R. (author)
- Bulik, T. (author)
- Buesching, I. (author)
- Boutelier, T. (author)
- Chadwick, P. M. (author)
- Charbonnier, A. (author)
- Chaves, R. C. G. (author)
- Cheesebrough, A. (author)
- Chounet, L. -M (author)
- Clapson, A. C. (author)
- Coignet, G. (author)
- Dalton, M. (author)
- Daniel, M. K. (author)
- Davids, I. D. (author)
- Degrange, B. (author)
- Deil, C. (author)
- Dickinson, H. J. (author)
- Djannati-Atai, A. (author)
- Domainko, W. (author)
- Drury, L. O 'C. (author)
- Dubois, F. (author)
- Dubus, G. (author)
- Dyks, J. (author)
- Dyrda, M. (author)
- Egberts, K. (author)
- Emmanoulopoulos, D. (author)
- Espigat, P. (author)
- Farnier, C. (author)
- Feinstein, F. (author)
- Fiasson, A. (author)
- Foerster, A. (author)
- Fontaine, G. (author)
- Fuessling, M. (author)
- Gabici, S. (author)
- Gallant, Y. A. (author)
- Gerard, L. (author)
- Giebels, B. (author)
- Glicenstein, J. -F (author)
- Glueck, B. (author)
- Goret, P. (author)
- Goehring, D. (author)
- Hauser, D. (author)
- Hauser, M. (author)
- Heinz, S. (author)
- Heinzelmann, G. (author)
- Henri, G. (author)
- Hermann, G. (author)
- Hinton, J. A. (author)
- Hoffmann, A. (author)
- Hofmann, W. (author)
- Holleran, M. (author)
- Hoppe, S. (author)
- Horns, D. (author)
- Jacholkowska, A. (author)
- de Jager, O. C. (author)
- Jahn, C. (author)
- Jung, I. (author)
- Katarzynsky, K. (author)
- Katz, U. (author)
- Kaufmann, S. (author)
- Kendziorra, E. (author)
- Kerschhaggl, M. (author)
- Khangulyan, D. (author)
- Khelifi, B. (author)
- Keogh, D. (author)
- Kluzniak, W. (author)
- Kneiske, T. (author)
- Komin, Nu. (author)
- Kosack, K. (author)
- Lamanna, G. (author)
- Latham, I. J. (author)
- Lenain, J. -P (author)
- Lohse, T. (author)
- Marandon, V. (author)
- Martin, J. M. (author)
- Martineau-Huynh, O. (author)
- Marcowith, A. (author)
- Maurin, D. (author)
- McComb, T. J. L. (author)
- Medina, M. C. (author)
- Moderski, R. (author)
- Moulin, E. (author)
- Naumann-Godo, M. (author)
- de Naurois, M. (author)
- Nedbal, D. (author)
- Nekrassov, D. (author)
- Niemiec, J. (author)
- Nolan, S. J. (author)
- Ohm, S. (author)
- Olive, J. -F (author)
- Wilhelmi, E. de Ona (author)
- Orford, K. J. (author)
- Ostrowski, M. (author)
- Panter, M. (author)
- Arribas, M. Paz (author)
- Pedaletti, G. (author)
- Pelletier, G. (author)
- Petrucci, P. -O (author)
- Pita, S. (author)
- Puehlhofer, G. (author)
- Punch, M.Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France(Swepub:lnu)mipuaa (author)
- Quirrenbach, A. (author)
- Raubenheimer, B. C. (author)
- Raue, M. (author)
- Rayner, S. M. (author)
- Renaud, M. (author)
- Rieger, F. (author)
- Ripken, J. (author)
- Rob, L. (author)
- Rosier-Lees, S. (author)
- Rowell, G. (author)
- Rudak, B. (author)
- Rulten, C. B. (author)
- Ruppel, J. (author)
- Sahakian, V. (author)
- Santangelo, A. (author)
- Schlickeiser, R. (author)
- Schoeck, F. M. (author)
- Schroeder, R. (author)
- Schwanke, U. (author)
- Schwarzburg, S. (author)
- Schwemmer, S. (author)
- Shalchi, A. (author)
- Sikora, M. (author)
- Skilton, J. L. (author)
- Sol, H. (author)
- Spangler, D. (author)
- Stawarz, L. (author)
- Steenkamp, R. (author)
- Stegmann, C. (author)
- Superina, G. (author)
- Szostek, A. (author)
- Tam, P. H. (author)
- Tavernet, J. -P (author)
- Terrier, R. (author)
- Tibolla, O. (author)
- Tluczykont, M. (author)
- van Eldik, C. (author)
- Vasileiadis, G. (author)
- Venter, C. (author)
- Venter, L. (author)
- Vialle, J. P. (author)
- Vincent, P. (author)
- Vink, J. (author)
- Vivier, M. (author)
- Voelk, H. J. (author)
- Volpe, F. (author)
- Wagner, S. J. (author)
- Ward, M. (author)
- Zdziarski, A. A. (author)
- Zech, A. (author)
- Universite Paris 7 Denis DiderotUniv Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France (creator_code:org_t)
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- In:Astrophysical Journal Letters: Institute of Physics (IOP)695:1, s. L40-L442041-8205
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