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- Abramowski, A. (author)
DISCOVERY OF THE HARD SPECTRUM VHE gamma-RAY SOURCE HESS J1641-463
- Article/chapterEnglish2014
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- 2014
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-109246
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-109246URI
- https://doi.org/10.1088/2041-8205/794/1/L1DOI
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- Language:English
- Summary in:English
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- SwePubSwePub
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- AuthorCount:231;
- This Letter reports the discovery of a remarkably hard spectrum source, HESS J1641-463, by the High Energy Stereoscopic System (H.E.S.S.) in the very high energy (VHE) domain. HESS J1641-463 remained unnoticed by the usual analysis techniques due to confusion with the bright nearby source HESS J1640-465. It emerged at a significance level of 8.5 standard deviations after restricting the analysis to events with energies above 4 TeV. It shows a moderate flux level of phi(E > 1TeV) = (3.64 +/- 0.44(stat)+/- 0.73(sys)) x 10(-13) cm(-2) s(-1), corresponding to 1.8% of the Crab Nebula flux above the same energy, and a hard spectrum with a photon index of Gamma = 2.07 +/- 0.11(stat)+/- 0.20(sys). It is a point-like source, although an extension up to a Gaussian width of sigma = 3 arcmin cannot be discounted due to uncertainties in the H.E.S.S. point-spread function. The VHE gamma-ray flux of HESS J1641-463 is found to be constant over the observed period when checking time binnings from the year-by-year to the 28 minute exposure timescales. HESS J1641-463 is positionally coincident with the radio supernova remnant SNR G338.5+0.1. No X-ray candidate stands out as a clear association; however, Chandra and XMM-Newton data reveal some potential weak counterparts. Various VHE gamma-ray production scenarios are discussed. If the emission from HESS J1641-463 is produced by cosmic ray protons colliding with the ambient gas, then their spectrum must extend close to 1 PeV. This object may represent a source population contributing significantly to the galactic cosmic ray flux around the knee.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- cosmic rays
- gamma rays: general
- ISM: individual objects (SNR G338.3-0.0
- SNR G338.5+0.1)
Added entries (persons, corporate bodies, meetings, titles ...)
- Aharonian, F. (author)
- Benkhali, F. Ait (author)
- Akhperjanian, A. G. (author)
- Uner, E. O. Ang (author)
- Backes, M. (author)
- Balenderan, S. (author)
- Balzer, A. (author)
- Barnacka, A. (author)
- Becherini, Y. (author)
- Tjus, J. Becker (author)
- Berge, D. (author)
- Bernhard, S. (author)
- Bernloehr, K. (author)
- Birsin, E. (author)
- Biteau, J. (author)
- Boettcher, M. (author)
- Boisson, C. (author)
- Bolmont, J. (author)
- Bordas, P. (author)
- Bregeon, J. (author)
- Brun, F. (author)
- Brun, P. (author)
- Bryan, M. (author)
- Bulik, T. (author)
- Carrigan, S. (author)
- Casanova, S. (author)
- Chadwick, P. M. (author)
- Chakraborty, N. (author)
- Chalme-Calvet, R. (author)
- Chaves, R. C. G. (author)
- Chretien, M. (author)
- Colafrancesco, S. (author)
- Cologna, G. (author)
- Conrad, JanStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)conrad (author)
- Couturier, C. (author)
- Cui, Y. (author)
- Dalton, M. (author)
- Davids, I. D. (author)
- Degrange, B. (author)
- Deil, C. (author)
- deWilt, P. (author)
- Djannati-Atai, A. (author)
- Domainko, W. (author)
- Donath, A. (author)
- Drury, L. O 'C. (author)
- Dubus, G. (author)
- Dutson, K. (author)
- Dyks, J. (author)
- Dyrda, M. (author)
- Edwards, T. (author)
- Egberts, K. (author)
- Eger, P. (author)
- Espigat, P. (author)
- Farnier, ChristianStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)cfarn (author)
- Fegan, S. (author)
- Feinstein, F. (author)
- Fernandes, M. V. (author)
- Fernandez, D. (author)
- Fiasson, A. (author)
- Fontaine, G. (author)
- Foerster, A. (author)
- Fuessling, M. (author)
- Gabici, S. (author)
- Gajdus, M. (author)
- Gallant, Y. A. (author)
- Garrigoux, T. (author)
- Giavitto, G. (author)
- Giebels, B. (author)
- Glicenstein, J. F. (author)
- Gottschall, D. (author)
- Grondin, M. -H (author)
- Grudzinska, M. (author)
- Hadasch, D. (author)
- Haeffner, S. (author)
- Hahn, J. (author)
- Harris, J. (author)
- Heinzelmann, G. (author)
- Henri, G. (author)
- Hermann, G. (author)
- Hervet, O. (author)
- Hillert, A. (author)
- Hinton, J. A. (author)
- Hofmann, W. (author)
- Hofverberg, P. (author)
- Holler, M. (author)
- Horns, D. (author)
- Ivascenko, A. (author)
- Jacholkowska, A. (author)
- Jahn, C. (author)
- Jamrozy, M. (author)
- Janiak, M. (author)
- Jankowsky, F. (author)
- Jung-Richardt, I. (author)
- Kastendieck, M. A. (author)
- Katarzynski, K. (author)
- Katz, U. (author)
- Kaufmann, S. (author)
- Khelifi, B. (author)
- Kieffer, M. (author)
- Klepser, S. (author)
- Klochkov, D. (author)
- Kluzniak, W. (author)
- Kolitzus, D. (author)
- Komin, Nu. (author)
- Kosack, K. (author)
- Krakau, S. (author)
- Krayzel, F. (author)
- Krueger, P. P. (author)
- Laffon, H. (author)
- Lamanna, G. (author)
- Lau, J. (author)
- Lefaucheur, J. (author)
- Lefranc, V. (author)
- Lemiere, A. (author)
- Lemoine-Goumard, M. (author)
- Lenain, J. -P (author)
- Lohse, T. (author)
- Lopatin, A. (author)
- Lu, C. -C (author)
- Marandon, V. (author)
- Marcowith, A. (author)
- Marx, R. (author)
- Maurin, G. (author)
- Maxted, N. (author)
- Mayer, M. (author)
- McComb, T. J. L. (author)
- Mehault, J. (author)
- Meintjes, P. J. (author)
- Menzler, U. (author)
- Meyer, ManuelStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)mmanu (author)
- Mitchell, A. M. W. (author)
- Moderski, R. (author)
- Mohamed, M. (author)
- Morå, KnutStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)kdund (author)
- Moulin, E. (author)
- Murach, T. (author)
- de Naurois, M. (author)
- Niemiec, J. (author)
- Nolan, S. J. (author)
- Oakes, L. (author)
- Odaka, H. (author)
- Ohm, S. (author)
- Opitz, B. (author)
- Ostrowski, M. (author)
- Oya, I. (author)
- Panter, M. (author)
- Parsons, R. D. (author)
- Arribas, M. Paz (author)
- Pekeur, N. W. (author)
- Pelletier, G. (author)
- Petrucci, P. -O (author)
- Peyaud, B. (author)
- Pita, S. (author)
- Poon, H. (author)
- Puehlhofer, G. (author)
- Punch, M. (author)
- Quirrenbach, A. (author)
- Raab, S. (author)
- Reichardt, I. (author)
- Reimer, A. (author)
- Reimer, O. (author)
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- Reyes, R. de Los (author)
- Rieger, F. (author)
- Romoli, C. (author)
- Rosier-Lees, S. (author)
- Rowell, G. (author)
- Rudak, B. (author)
- Rulten, C. B. (author)
- Sahakian, V. (author)
- Salek, D. (author)
- Sanchez, D. A. (author)
- Santangelo, A. (author)
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- Schuessler, F. (author)
- Schulz, A. (author)
- Schwanke, U. (author)
- Schwarzburg, S. (author)
- Schwemmer, S. (author)
- Sol, H. (author)
- Spanier, F. (author)
- Spengler, GerritStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)gspen (author)
- Spies, F. (author)
- Stawarz, L. (author)
- Steenkamp, R. (author)
- Stegmann, C. (author)
- Stinzing, F. (author)
- Stycz, K. (author)
- Sushch, I. (author)
- Tavernet, J. -P (author)
- Tavernier, T. (author)
- Taylor, A. M. (author)
- Terrier, R. (author)
- Tluczykont, M. (author)
- Trichard, C. (author)
- Valerius, K. (author)
- Van Eldik, C. (author)
- van Soelen, B. (author)
- Vasileiadis, G. (author)
- Veh, J. (author)
- Venter, C. (author)
- Viana, A. (author)
- Vincent, P. (author)
- Vink, J. (author)
- Voelk, H. J. (author)
- Volpe, F. (author)
- Vorster, M. (author)
- Vuillaume, T. (author)
- Wagner, S. J. (author)
- Wagner, P. (author)
- Wagner, Robert M.Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)rwagner (author)
- Ward, M. (author)
- Weidinger, M. (author)
- Weitzel, Q. (author)
- White, R. (author)
- Wierzcholska, A. (author)
- Willmann, P. (author)
- Woernlein, A. (author)
- Wouters, D. (author)
- Yang, R. (author)
- Zabalza, V. (author)
- Zaborov, D. (author)
- Zacharias, M. (author)
- Zdziarski, A. A. (author)
- Zech, A. (author)
- Zechlin, H. -S (author)
- Fukui, Y. (author)
- Sano, H. (author)
- Fukuda, T. (author)
- Yoshiike, S. (author)
- Stockholms universitetFysikum (creator_code:org_t)
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- In:Astrophysical Journal Letters794:1, s. L1-2041-82052041-8213
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