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The high-energy gamma-ray emission of AP Librae
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- Abramowski, A. (author)
- Univ Hamburg, Inst Experimentalphys, D-22761 Hamburg, Germany,Natl Acad Sci Republ Armenia, Yerevan, Armenia ; Yerevan Phys Inst, Yerevan 375036, Armenia,DESY, D-15738 Zeuthen, Germany ; Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany,Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland
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- Aharonian, F. (author)
- Max Planck Inst Kernphys, D-69029 Heidelberg, Germany ; Dublin Inst Adv Studies, Dublin 4, Ireland ; Natl Acad Sci Republ Armenia, Yerevan, Armenia
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- Benkhali, F. Ait (author)
- Max Planck Inst Kernphys, D-69029 Heidelberg, Germany
- show more...
- Tjus, J. Becker (author)
- Bernlhr, K. (author)
- Birsin, E. (author)
- Bissaldi, E. (author)
- Biteau, J. (author)
- Boettcher, M. (author)
- Boisson, C. (author)
- Bolmont, J. (author)
- Bordas, P. (author)
- Brucker, J. (author)
- Brun, F. (author)
- Brun, P. (author)
- Bulik, T. (author)
- Carrigan, S. (author)
- Casanova, S. (author)
- Chalme-Calvet, R. (author)
- Chaves, R. C. G. (author)
- Cheesebrough, A. (author)
- Chretien, M. (author)
- Colafrancesco, S. (author)
- Cologna, G. (author)
- Couturier, C. (author)
- Cui, Y. (author)
- Dalton, M. (author)
- Daniel, M. K. (author)
- Davids, I. D. (author)
- Degrange, B. (author)
- Deil, C. (author)
- deWilt, P. (author)
- Djannati-Atai, A. (author)
- Domainko, W. (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)
- 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)
- Gajdus, M. (author)
- Gallant, Y. A. (author)
- Garrigoux, T. (author)
- Giavitto, G. (author)
- Giebels, B. (author)
- Glicenstein, J. F. (author)
- Grondin, M. -H (author)
- Grudzinska, M. (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)
- Jacholkowska, A. (author)
- Jahn, C. (author)
- Jamrozy, M. (author)
- Janiak, M. (author)
- Jankowsky, F. (author)
- Jung, 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)
- Kneiske, T. (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)
- Lefaucheur, J. (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, M. (author)
- Moderski, R. (author)
- Mohamed, M. (author)
- Moulin, E. (author)
- Murach, T. (author)
- Naumann, C. L. (author)
- de Naurois, M. (author)
- Niemiec, J. (author)
- Nolan, S. J. (author)
- Oakes, L. (author)
- Odaka, H. (author)
- Ohm, S. (author)
- Wilhelmi, E. de Ona (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)
- Perez, J. (author)
- Petrucci, P. -O (author)
- Peyaud, B. (author)
- Pita, S. (author)
- Poon, H. (author)
- Puehlhofer, G. (author)
- Quirrenbach, A. (author)
- Raab, S. (author)
- Raue, M. (author)
- Reichardt, I. (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Renaud, M. (author)
- de los Reyes, R. (author)
- Rieger, F. (author)
- Rob, L. (author)
- Romoli, C. (author)
- Rosier-Lees, S. (author)
- Rowell, G. (author)
- Rudak, B. (author)
- Rulten, C. B. (author)
- Sahakian, V. (author)
- Sanchez, D. A. (author)
- Santangelo, A. (author)
- Schlickeiser, R. (author)
- Schuessler, F. (author)
- Schulz, A. (author)
- Schwanke, U. (author)
- Schwarzburg, S. (author)
- Schwemmer, S. (author)
- Sol, H. (author)
- Spengler, G. (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)
- Venter, C. (author)
- Viana, A. (author)
- Vincent, P. (author)
- Voelk, H. J. (author)
- Volpe, F. (author)
- Vorster, M. (author)
- Vuillaume, T. (author)
- Wagner, S. J. (author)
- Wagner, P. (author)
- Wagner, R. M. (author)
- Ward, M. (author)
- Weidinger, M. (author)
- Weitzel, Q. (author)
- White, R. (author)
- Wierzcholska, A. (author)
- Willmann, P. (author)
- Wrnlein, A. (author)
- Wouters, D. (author)
- Yang, R. (author)
- Zabalza, V. (author)
- Zacharias, M. (author)
- Zdziarski, A. A. (author)
- Zech, A. (author)
- Zechlin, H. -S (author)
- Finke, J. (author)
- Fortin, P. (author)
- Horan, D. (author)
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- (creator_code:org_t)
- 2014-12-10
- 2015
- English.
- In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 573
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The gamma-ray spectrum of the low-frequency-peaked BL Lac (LBL) object AP Librae is studied, following the discovery of very-high-energy (VHE; E > 100 GeV) gamma-ray emission up to the TeV range by the H.E.S.S. experiment. Thismakes AP Librae one of the few VHE emitters of the LBL type. The measured spectrum yields a flux of (8.8 +/- 1.5(stat) +/- 1.8(sys)) x 10(-12) cm(-2) s(-1) above 130 GeV and a spectral index of Gamma = 2.65 +/- 0.19(stat) +/- 0.20(sys). This study also makes use of Fermi-LAT observations in the high energy (HE, E > 100 MeV) range, providing the longest continuous light curve (5 years) ever published on this source. The source underwent a flaring event between MJD 56 306-56 376 in the HE range, with a flux increase of a factor of 3.5 in the 14 day bin light curve and no significant variation in spectral shape with respect to the low-flux state. While the H.E.S.S. and (low state) Fermi-LAT fluxes are in good agreement where they overlap, a spectral curvature between the steep VHE spectrum and the Fermi-LAT spectrum is observed. The maximum of the gamma-ray emission in the spectral energy distribution is located below the GeV energy range.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: active
- BL Lacertae objects: individual: AP Librae
- gamma rays: galaxies
- Astroparticle Physics
- Astropartikelfysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Aharonian, F.
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- Bordas, P.
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- Kluzniak, W.
- Kneiske, T.
- Kolitzus, D.
- Komin, Nu.
- Kosack, K.
- Krakau, S.
- Krayzel, F.
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- Laffon, H.
- Lamanna, G.
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- Lu, C. -C
- Marandon, V.
- Marcowith, A.
- Marx, R.
- Maurin, G.
- Maxted, N.
- Mayer, M.
- McComb, T. J. L.
- Mehault, J.
- Meintjes, P. J.
- Menzler, U.
- Meyer, M.
- Moderski, R.
- Mohamed, M.
- Moulin, E.
- Murach, T.
- Naumann, C. L.
- de Naurois, M.
- Niemiec, J.
- Nolan, S. J.
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- Ostrowski, M.
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- Pelletier, G.
- Perez, J.
- Petrucci, P. -O
- Peyaud, B.
- Pita, S.
- Poon, H.
- Puehlhofer, G.
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- Quirrenbach, A.
- Raab, S.
- Raue, M.
- Reichardt, I.
- Reimer, A.
- Reimer, O.
- Renaud, M.
- de los Reyes, R.
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- Rob, L.
- Romoli, C.
- Rosier-Lees, S.
- Rowell, G.
- Rudak, B.
- Rulten, C. B.
- Sahakian, V.
- Sanchez, D. A.
- Santangelo, A.
- Schlickeiser, R.
- Schuessler, F.
- Schulz, A.
- Schwanke, U.
- Schwarzburg, S.
- Schwemmer, S.
- Sol, H.
- Spengler, G.
- Spies, F.
- Stawarz, L.
- Steenkamp, R.
- Stegmann, C.
- Stinzing, F.
- Stycz, K.
- Sushch, I.
- Tavernet, J. -P
- Tavernier, T.
- Taylor, A. M.
- Terrier, R.
- Tluczykont, M.
- Trichard, C.
- Valerius, K.
- van Eldik, C.
- van Soelen, B.
- Vasileiadis, G.
- Venter, C.
- Viana, A.
- Vincent, P.
- Voelk, H. J.
- Volpe, F.
- Vorster, M.
- Vuillaume, T.
- Wagner, S. J.
- Wagner, P.
- Wagner, R. M.
- Ward, M.
- Weidinger, M.
- Weitzel, Q.
- White, R.
- Wierzcholska, A.
- Willmann, P.
- Wrnlein, A.
- Wouters, D.
- Yang, R.
- Zabalza, V.
- Zacharias, M.
- Zdziarski, A. A.
- Zech, A.
- Zechlin, H. -S
- Finke, J.
- Fortin, P.
- Horan, D.
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