Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Discovery of Very High Energy gamma-Ray Emission from Centaurus a with H.E.S.S.

    Access Status
    Fulltext not available
    Authors
    Aharonian, F.
    Akhperjanian, A.
    Anton, G.
    De Almeida, U.
    Bazer-Bachi, A.
    Becherini, Y.
    Behera, B.
    Benbow, W.
    Bernlöhr, K.
    Boisson, C.
    Bochow, A.
    Borrel, V.
    Brion, E.
    Brucker, J.
    Brun, P.
    BüHLER, R.
    Bulik, T.
    Büsching, I.
    Boutelier, T.
    Chadwick, P.
    Charbonnier, A.
    Chaves, R.
    Cheesebrough, A.
    Chounet, L.
    Clapson, A.
    Coignet, G.
    Dalton, M.
    Daniel, M.
    Davids, I.
    Degrange, B.
    Deil, C.
    Dickinson, H.
    Djannati-Ataï, A.
    Domainko, W.
    Drury, L.
    Dubois, F.
    Dubus, G.
    Dyks, J.
    Dyrda, M.
    Egberts, K.
    Emmanoulopoulos, D.
    Espigat, P.
    Farnier, C.
    Feinstein, F.
    Fiasson, A.
    Förster, A.
    Fontaine, G.
    Füling, M.
    Gabici, S.
    Gallant, Y.
    Gerard, L.
    Giebels, B.
    Glicenstein, J.
    Glück, B.
    Goret, P.
    Göhring, D.
    Häuser, D.
    Hauser, M.
    Heinz, S.
    Heinzelmann, G.
    Henri, G.
    Hermann, G.
    Hinton, J.
    Hoffmann, A.
    Hofmann, W.
    Holleran, M.
    Hoppe, P.
    Horns, D.
    Jacholkowska, A.
    De Jager, O.
    Jahn, C.
    Jung, I.
    Katarzynski, K.
    Katz, U.
    Kaufmann, S.
    Kendziorra, E.
    Kerschhaggl, M.
    Khangulyan, D.
    Khélifi, B.
    Keogh, D.
    Kluzniak, W.
    Kneiske, T.
    Komin, N.
    Kosack, K.
    Lamanna, G.
    Latham, I.
    Lenain, J.
    Lohse, T.
    Marandon, V.
    Martin, J.
    Martineau-Huynh, O.
    Marcowith, A.
    Maurin, D.
    McComb, T.
    Medina, C.
    Moderski, R.
    Moulin, E.
    Naumann-Godo, M.
    de Naurois, M.
    Nedbal, D.
    Nekrassov, D.
    Niemiec, J.
    Nolan, S.
    Ohm, S.
    Olive, J.
    de Oña Wilhelmi, E.
    Orford, K.
    Ostrowski, M.
    Panter, M.
    Paz Arribas, M.
    Pedaletti, G.
    Pelletier, G.
    Petrucci, P.
    Pita, S.
    Pühlhofer, G.
    Punch, M.
    Quirrenbach, A.
    Raubenheimer, B.
    Raue, M.
    Rayner, S.
    Renaud, M.
    Rieger, F.
    Ripken, J.
    Rob, L.
    Rosier Lees, S.
    Rowell, G.
    Rudak, B.
    Rulten, C.
    Ruppel, J.
    Sahakian, V.
    Santangelo, A.
    Schlickeiser, R.
    Schöck, F.
    Schröder, R.
    Schwanke, U.
    Schwarzburg, S.
    Schwemmer, S.
    Shalchi, A.
    Sikora, M.
    Skilton, J.
    Sol, H.
    Spangler, D.
    Stawarz, L.
    Steenkamp, R.
    Stegmann, C.
    Superina, G.
    Szostek, A.
    Tam, P.
    Tavernet, J.
    Terrier, R.
    Tibolla, Omar
    Tluczykont, M.
    van Eldik, C.
    Vasileiadis, G.
    Venter, C.
    Venter, L.
    Vialle, J.
    Vincent, P.
    Vink, J.
    Vivier, M.
    Volk, H.
    Volpe, F.
    Wagner, S.
    Ward, M.
    Zdziarski, A.
    Zech, A.
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Aharonian, F. and Akhperjanian, A. and Anton, G. and De Almeida, U. and Bazer-Bachi, A. and Becherini, Y. and Behera, B. et al. 2009. Discovery of Very High Energy gamma-Ray Emission from Centaurus a with H.E.S.S.. The Astrophysical Journal. 695: pp. L40-L44.
    Source Title
    The Astrophysical Journal
    Additional URLs
    http://iopscience.iop.org/1538-4357/695/1/L40/pdf/apjl_695_1_40.pdf
    ISSN
    0004-637X
    URI
    http://hdl.handle.net/20.500.11937/23667
    Collection
    • Curtin Research Publications
    Abstract

    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 5.0sigma is detected from the region including the radio core and the inner kpc jets. The integral flux above an energy threshold of ~250 GeV is measured to be 0.8% of the flux of the Crab Nebula (apparent luminosity: L(>250 GeV) ˜2.6 × 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 ± 0.5stat ± 0.2sys. 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 ~15-20 (3sigma and 4sigma, 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.

    Related items

    Showing items related by title, author, creator and subject.

    • Faraday Rotation Structure on Kiloparsec Scales in the Radio Lobes of Centaurus A
      Feain, I.; Ekers, R.; Murphy, T.; Gaensler, B.; Macquart, Jean-pierre; Norris, R.; Cornwell, T.; Johnston-Hollitt, M.; Ott, J.; Middelburg, E. (2009)
      We present the results of an Australia Telescope Compact Array 1.4 GHz spectropolarimetric aperture synthesis survey of 34 deg2 centered on Centaurus A-NGC 5128. A catalog of 1005 extragalactic compact radio sources in ...
    • Limit on the ultrahigh-energy neutrino flux from lunar observations with the Parkes radio telescope
      Bray, J.; Ekers, Ronald; Roberts, P.; Reynolds, J.; James, C.; Phillips, C.; Protheroe, R.; McFadden, R.; Aartsen, M. (2015)
      © 2015 American Physical Society. We report a limit on the ultrahigh-energy neutrino flux based on a nondetection of radio pulses from neutrino-initiated particle cascades in the Moon, in observations with the Parkes radio ...
    • The jet/wind outflow in Centaurus A: A local laboratory for AGN feedback
      McKinley, B.; Tingay, Steven; Carretti, E.; Ellis, S.; Bland-Hawthorn, J.; Morganti, R.; Line, J.; McDonald, M.; Veilleux, S.; Wahl Olsen, R.; Sidonio, M.; Ekers, Ronald; Offringa, A.; Procopio, P.; Pindor, B.; Wayth, Randall; Hurley-Walker, Natasha; Bernardi, G.; Gaensler, B.; Haverkorn, M.; Kesteven, M.; Poppi, S.; Staveley-Smith, L. (2018)
      We present new radio and optical images of the nearest radio galaxy Centaurus A and its host galaxy NGC 5128.We focus our investigation on the northern transition region, where energy is transported from the ~5 kpc (~5 ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.