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Tytuł:
Long-term monitoring of PKS 2155−304 with ATOM and H.E.S.S. : investigation of optical/\gamma -ray correlations in different spectral states
Autorzy:
Holler, M.
Schulz, A.
Zechlin, H.-S.
Vuillaume, T.
Renaud, M.
Dutson, K.
Feinstein, F.
Cui, Y.
Eger, P.
Pelletier, G.
Vincent, P.
Davids, I. D.
Jahn, C.
Laffon, H.
Schwemmer, S.
Weitzel, Q.
Katz, U.
Dalton, M.
Dyrda, M.
Chadwick, P. M.
Komin, Nu.
Bulik, T.
Poon, H.
Wouters, D.
Kaufmann, S.
Marcowith, A.
Dyks, J.
Biteau, J.
Bryan, M.
Balenderan, S.
Donath, A.
Fernandes, M. V.
Gallant, Y. A.
Reimer, A.
Egberts, K.
Meintjes, P. J.
Espigat, P.
Kieffer, M.
Tavernet, J.-P.
White, R.
Fontaine, G.
Steenkamp, R.
Volpe, F.
Gabici, S.
Hofverberg, P.
Kluźniak, W.
Oakes, L.
Krayzel, F.
Mitchell, A. M. W.
Venter, C.
Spengler, G.
Tavernier, T.
Mayer, M.
Lamanna, G.
Zaborov, D.
Chrétien, M.
Lenain, J.-P.
Lemoine-Goumard, M.
Moulin, E.
Cologna, G.
Janiak, M.
de Naurois, M.
Paz Arribas, M.
Lohse, T.
Henri, G.
Sushch, I.
Veh, J.
Zech, A.
Romoli, C.
Spies, F.
Häffner, S.
Pekeur, N. W.
Hadsch, D.
Kastendieck, M. A.
Böttcher, M.
Giavitto, G.
Degrange, B.
Chaves, R. C. G.
Barnacka, Anna
Opitz, B.
Rob, L.
Yang, R.
Deil, C.
Khélifi, B.
Angüner, E. O.
Akhperjanian, A. G.
Meyer, M.
Moderski, R.
Schwanke, U.
Völk, H. J.
Santangelo, A.
Brun, P.
Fiasson, A.
Jamrozy, Marek
Murach, T.
Fernandez, D.
Spanier, F.
Hermann, G.
Vasileiadis, G.
Ohm, S.
Bernlöhr, K.
Stycz, K.
Schlickeiser, R.
van Soelen, B.
deWilt, P.
Domainko, W.
Nolan, S. J.
Sanchez, D. A.
Jung, I.
Perez, J.
Bregeon, J.
Becherini, Y.
Lopatin, A.
Reichardt, I.
Giebels, B.
Méhault, J.
Wagner, R. M.
Chakraborty, N.
Mohamed, M.
Kosack, K.
Lu, C.-C.
Berge, D.
Wagner, S. J.
Becker Tjus, J.
Couturier, C.
Edwards, T.
Marx, R.
McComb, T. J. L.
Chalme-Calvet, R.
Pita, S.
Viana, A.
Parsons, R. D.
Punch, M.
Drury, L. O’C.
Stinzing, F.
Weidinger, M.
Rulten, C. B.
Horns, D.
Boisson, C.
Zacharias, M.
Bernhard, S.
Schwarzburg, S.
Djannati-Ataï, A.
Niemiec, J.
Salek, D.
Balzer, A.
Krüger, P. P.
Lefranc, V.
Panter, M.
Wierzcholska, Alicja
Fegan, S.
Morå, K.
Rudak, B.
de los Reyes, R.
Stawarz, Łukasz
Ward, M.
Rosier-Lees, S.
Hofmann, W.
Gajdus, M.
Hillert, A.
Füßling, M.
Garrigoux, T.
Brun, F.
Willmann, P.
Ivascenko, A.
Marandon, V.
Odaka, H.
Gottschall, D.
Trichard, C.
Katarzyński, K.
Heinzelmann, G.
van Eldik, C.
Petrucci, P.-O.
Aharonian, F.
Glicenstein, J. F.
Conrad, J.
Menzler, U.
Grudzińska, M.
Terrier, R.
Bolmont, J.
Stegmann, C.
Maurin, G.
Reimer, O.
Abramowski, A.
Lemière, A.
Ait Benkhali, F.
Klochkov, D.
Sahakian, V.
Carrigan, S.
Rowell, G.
Colafrancesco, S.
Hinton, J. A.
Farnier, C.
Grondin, M.-H.
Harris, J.
Lefaucheur, J.
Ostrowski, Michał
Oya, I.
Taylor, A. M.
Krakau, S.
Casanova, S.
Wagner, P.
Pühlhofer, G.
Vorster, M.
Quirrenbach, A.
Peyaud, B.
Raab, S.
Maxted, N.
Wörnlein, A.
Hahn, J.
Backes, M.
Kolitzus, D.
Schüssler, F.
Valerius, K.
Zdziarski, A. A.
Tluczykont, M.
Jankowsky, F.
Förster, A.
Hervet, O.
Vink, J.
Zabalza, V.
Klepser, S.
Sol, H.
Rieger, F.
Jacholkowska, A.
Birsin, E.
Dubus, G.
Bordas, P.
Opis:
In this paper we report on the analysis of all the available optical and very high-energy $\gamma$-ray (>200 GeV) data for the BL Lac object PKS 2155−304, collected simultaneously with the ATOM and H.E.S.S. telescopes from 2007 until 2009. This study also includes X-ray (RXTE, Swift) and high-energy $\gamma$-ray (Fermi-LAT) data. During the period analysed, the source was transitioning from its flaring to quiescent optical states, and was characterized by only moderate flux changes at different wavelengths on the timescales of days and months. A flattening of the optical continuum with an increasing optical flux can be noted in the collected dataset, but only occasionally and only at higher flux levels. We did not find any universal relation between the very high-energy $\gamma$-ray and optical flux changes on the timescales from days and weeks up to several years. On the other hand, we noted that at higher flux levels the source can follow two distinct tracks in the optical flux–colour diagrams, which seem to be related to distinct $\gamma$-ray states of the blazar. The obtained results therefore indicate a complex scaling between the optical and $\gamma$-ray emission of PKS 2155−304, with different correlation patterns holding at different epochs, and a $\gamma$-ray flux depending on the combination of an optical flux and colour rather than a flux alone.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud
Autorzy:
Holler, M.
Schulz, A.
Zechlin, H.-S.
Vuillaume, T.
Renaud, M.
Dutson, K.
Feinstein, F.
Cui, Y.
Eger, P.
Pelletier, G.
Vincent, P.
Davids, I. D.
Jahn, C.
Laffon, H.
Schwemmer, S.
Weitzel, Q.
Katz, U.
Dyrda, M.
Chadwick, P. M.
Komin, Nu.
Bulik, T.
Poon, H.
Wouters, D.
Kaufmann, S.
Marcowith, A.
Dyks, J.
Biteau, J.
Bryan, M.
Balenderan, S.
Donath, A.
Fernandes, M. V.
Gallant, Y. A.
Reimer, A.
Hadasch, D.
Egberts, K.
Meintjes, P. J.
Espigat, P.
Kieffer, M.
Tavernet, J.-P.
White, R.
Fontaine, G.
Steenkamp, R.
Volpe, F.
Gabici, S.
Hofverberg, P.
Kluźniak, W.
Oakes, L.
Krayzel, F.
Mitchell, A. M. W.
Venter, C.
Spengler, G.
Tavernier, T.
Mayer, M.
Lamanna, G.
Zaborov, D.
Chrétien, M.
Lenain, J.-P.
Lemoine-Goumard, M.
Moulin, E.
Cologna, G.
Janiak, M.
de Naurois, M.
Paz Arribas, M.
Lohse, T.
Henri, G.
Sushch, I.
Veh, J.
Zech, A.
Romoli, C.
Spies, F.
Häffner, S.
Pekeur, N. W.
Kastendieck, M. A.
Böttcher, M.
Giavitto, G.
Degrange, B.
Chaves, R. C. G.
Barnacka, Anna
Opitz, B.
Yang, R.
Deil, C.
Khélifi, B.
Angüner, E. O.
Akhperjanian, A. G.
Meyer, M.
Moderski, R.
Schwanke, U.
Völk, H. J.
Santangelo, A.
Brun, P.
Fiasson, A.
Jamrozy, Marek
Murach, T.
Fernandez, D.
Spanier, F.
Hermann, G.
Vasileiadis, G.
Ohm, S.
Bernlöhr, K.
Stycz, K.
Schlickeiser, R.
van Soelen, B.
deWilt, P.
Domainko, W.
Nolan, S. J.
Sanchez, D. A.
Bregeon, J.
Becherini, Y.
Lopatin, A.
Reichardt, I.
Giebels, B.
Méhault, J.
Wagner, R. M.
Chakraborty, N.
Mohamed, M.
Kosack, K.
Lu, C.-C.
Berge, D.
Wagner, S. J.
Becker Tjus, J.
Couturier, C.
Edwards, T.
Marx, R.
McComb, T. J. L.
Chalme-Calvet, R.
Pita, S.
Viana, A.
Parsons, R. D.
Punch, M.
Drury, L. O’C.
Stinzing, F.
Weidinger, M.
Rulten, C. B.
Horns, D.
Boisson, C.
Zacharias, M.
Bernhard, S.
Schwarzburg, S.
Djannati-Ataï, A.
Niemiec, J.
Salek, D.
Balzer, A.
Krüger, P. P.
Lefranc, V.
Panter, M.
Wierzcholska, Alicja
Fegan, S.
Morå, K.
Rudak, B.
de los Reyes, R.
Stawarz, Łukasz
Ward, M.
Rosier-Lees, S.
Hofmann, W.
Gajdus, M.
Hillert, A.
Füßling, M.
Garrigoux, T.
Brun, F.
Willmann, P.
Ivascenko, A.
Marandon, V.
Odaka, H.
Gottschall, D.
Trichard, C.
Katarzyński, K.
Heinzelmann, G.
van Eldik, C.
Petrucci, P.-O.
Aharonian, F.
Glicenstein, J. F.
Conrad, J.
Menzler, U.
Grudzińska, M.
Terrier, R.
Bolmont, J.
Stegmann, C.
Maurin, G.
Reimer, O.
Abramowski, A.
Lemière, A.
Ait Benkhali, F.
Klochkov, D.
Sahakian, V.
Carrigan, S.
Rowell, G.
Colafrancesco, S.
Hinton, J. A.
Farnier, C.
Grondin, M.-H.
Harris, J.
Lefaucheur, J.
Ostrowski, Michał
Oya, I.
Taylor, A. M.
Krakau, S.
Casanova, S.
Wagner, P.
Jung-Richardt, I.
Pühlhofer, G.
Vorster, M.
Quirrenbach, A.
Peyaud, B.
Raab, S.
Maxted, N.
Wörnlein, A.
Hahn, J.
Backes, M.
Kolitzus, D.
Schüssler, F.
Valerius, K.
Zdziarski, A. A.
Tluczykont, M.
Jankowsky, F.
Förster, A.
Hervet, O.
Vink, J.
Zabalza, V.
Klepser, S.
Sol, H.
Rieger, F.
Jacholkowska, A.
Birsin, E.
Dubus, G.
Bordas, P.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Diffuse Galactic gamma-ray emission with H.E.S.S.
Autorzy:
Laffon, H.
Schüssler, F.
Garrigoux, T.
Niemiec, J.
Holler, M.
Fegan, S.
Krayzel, F.
Dyrda, M.
Fontaine, G.
Meintjes, P. J.
Odaka, H.
Bernhard, S.
Mayer, M.
Santangelo, A.
Gottschall, D.
Dyks, J.
Hadasch, D.
Klochkov, D.
Lenain, J.-P.
Aharonian, F.
Becker Tjus, J.
Chakraborty, N.
Krakau, S.
Schwemmer, S.
Katz, U.
Willmann, P.
Giavitto, G.
Drury, L. O’C.
Romoli, C.
Heinzelmann, G.
Balzer, A.
Domainko, W.
Kieffer, M.
Bryan, M.
Ohm, S.
Henri, G.
Marcowith, A.
Lopatin, A.
Mohamed, M.
Sanchez, D. A.
Wierzcholska, Alicja
Oya, I.
Wörnlein, A.
Giebels, B.
Paz Arribas, M.
Lohse, T.
Pelletier, G.
Brun, P.
Ait Benkhali, F.
Harris, J.
Punch, M.
Vink, J.
Reimer, O.
Chadwick, P. M.
Boisson, C.
Casanova, S.
Kolitzus, D.
Birsin, E.
Conrad, J.
Rulten, C. B.
Colafrancesco, S.
Lefaucheur, J.
Katarzyński, K.
Wouters, D.
Venter, C.
Jahn, C.
Kluźniak, W.
Bernlöhr, K.
Méhault, J.
Bulik, T.
Böttcher, M.
Brun, F.
Stegmann, C.
Kaufmann, S.
Tluczykont, M.
Fukui, Y.
Veh, J.
Marandon, V.
van Eldik, C.
Vorster, M.
Opitz, B.
Hofverberg, P.
Hahn, J.
Hinton, J. A.
Stawarz, Łukasz
Janiak, M.
Eger, P.
Vincent, P.
Rudak, B.
Fernandes, M. V.
Poon, H.
Tavernet, J.-P.
Bolmont, J.
Reimer, A.
Fiasson, A.
McComb, T. J. L.
Trichard, C.
Lefranc, V.
Angüner, E. O.
Schlickeiser, R.
Renaud, M.
Menzler, U.
Hervet, O.
Tavernier, T.
de Naurois, M.
Moulin, E.
Kosack, K.
Yang, R.
Rosier-Lees, S.
Wagner, S. J.
Zabalza, V.
Schwarzburg, S.
Farnier, C.
Hillert, A.
Viana, A.
Maxted, N.
Fernandez, D.
Gabici, S.
Salek, D.
Zaborov, D.
Häffner, S.
Grudzińska, M.
Degrange, B.
Taylor, A. M.
Ivascenko, A.
Vasileiadis, G.
Grondin, M.-H.
Wagner, R. M.
Reichardt, I.
Davids, I. D.
Ostrowski, Michał
Barnacka, Anna
Couturier, C.
Förster, A.
Balenderan, S.
Zacharias, M.
Djannati-Ataï, A.
Dubus, G.
Khélifi, B.
Zechlin, H.-S.
Hermann, G.
Jamrozy, Marek
Schwanke, U.
Weidinger, M.
Moderski, R.
Biteau, J.
Becherini, Y.
Jacholkowska, A.
Dutson, K.
Quirrenbach, A.
deWilt, P.
Bordas, P.
Lu, C.-C.
Lamanna, G.
Maurin, G.
White, R.
van Soelen, B.
Rowell, G.
Feinstein, F.
Schulz, A.
Volpe, F.
Cologna, G.
Jung-Richardt, I.
Cui, Y.
Meyer, M.
Lemoine-Goumard, M.
Stinzing, F.
Backes, M.
Edwards, T.
Kastendieck, M. A.
Horns, D.
Peyaud, B.
Espigat, P.
Carrigan, S.
Marx, R.
Glicenstein, J. F.
Spengler, G.
Rieger, F.
Gallant, Y. A.
Akhperjanian, A. G.
Berge, D.
Lemière, A.
Ward, M.
Bregeon, J.
Krüger, P. P.
Terrier, R.
Mitchell, A. M. W.
Abramowski, A.
Morå, K.
Parsons, R. D.
Pühlhofer, G.
Hofmann, W.
Spies, F.
Chalme-Calvet, R.
Murach, T.
Egberts, K.
Sol, H.
Valerius, K.
Pekeur, N. W.
Stycz, K.
Sushch, I.
Chaves, R. C. G.
Petrucci, P.-O.
Raab, S.
Panter, M.
Jankowsky, F.
Völk, H. J.
Gajdus, M.
Nolan, S. J.
Füßling, M.
Pita, S.
Sahakian, V.
Weitzel, Q.
Chrétien, M.
Oakes, L.
Vuillaume, T.
Zdziarski, A. A.
Deil, C.
Spanier, F.
Zech, A.
de los Reyes, R.
Wagner, P.
Steenkamp, R.
Klepser, S.
Donath, A.
Komin, Nu.
Opis:
Diffuse $\gamma$-ray emission is the most prominent observable signature of celestial cosmic-ray interactions at high energies. While already being investigated at GeVenergies over several decades, assessments of diffuse $\gamma$-ray emission at TeVenergies remain sparse. After completion of the systematic survey of the inner Galaxy, the H.E.S.S. experiment is in a prime position to observe large-scale diffuse emission at TeVenergies. Data of the H.E.S.S. Galactic Plane Survey are investigated in regions off known $\gamma$-ray sources. Corresponding $\gamma$-ray flux measurements were made over an extensive grid of celestial locations. Longitudinal and latitudinal profiles of the observed $\gamma$-ray fluxes show characteristic excess emission not attributable to known $\gamma$-ray sources. For the first time large-scale $\gamma$-ray emission along the Galactic plane using imaging atmospheric Cherenkov telescopes has been observed. While the background subtraction technique limits the ability to recover modest variation on the scale of the H.E.S.S. field of view or larger, which is characteristic of the inverse Compton scatter-induced Galactic diffuse emission, contributions of neutral pion decay as well as emission from unresolved $\gamma$-ray sources can be recovered in the observed signal to a large fraction. Calculations show that the minimum $\gamma$-ray emission from $\pi^{0}$ decay represents a significant contribution to the total signal. This detection is interpreted as a mix of diffuse Galactic $\gamma$-ray emission and unresolved sources
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The 2014 TeV $\gamma$-ray fare of Mrk 501 seen with H.E.S.S. : temporal and spectral constraints on Lorentz invariance violation
Autorzy:
Holler, M.
Schulz, A.
Funk, S.
Voisin, F.
Renaud, M.
Vuillaume, T.
Vincent, P.
Leser, E.
Davids, I. D.
Prokhorov, D.
Seyffert, A. S.
Schwemmer, S.
Katz, U.
Senniappan, M.
Dirson, L.
Gaté, F.
Komin, Nu.
Bulik, T.
Ruiz-Velasco, E.
Marcowith, A.
Cerruti, M.
Bryan, M.
Donath, A.
O’C. Drury, L.
Armand, C.
Dyks, J.
Gallant, Y. A.
Noel, Angel
Rinchiuso, L.
Reimer, A.
Lau, J.
Egberts, K.
Meintjes, P. J.
White, R.
Jouvin, L.
Tavernet, J.-P.
Fontaine, G.
Rauth, R.
Chen, A.
Steenkamp, R.
Gabici, S.
Oakes, L.
Blackwell, R.
Huber, D.
Kluźniak, W.
Mitchell, A. M. W.
Khangulyan, D.
Venter, C.
Shiningayamwe, K.
Tavernier, T.
Lamanna, G.
Zaborov, D.
Kerszberg, D.
Lenain, J.-P.
Ndiyavala, H.
Lemoine-Goumard, M.
Moulin, E.
Carosi, A.
de Naurois, M.
Lohse, T.
Niederwanger, F.
Henri, G.
Malyshev, D.
Veh, J.
Zech, A.
Romoli, C.
Tuffs, R.
Kastendieck, M. A.
Böttcher, M.
Kraus, M.
Giavitto, G.
Spir-Jacob, M.
Chaves, R. C. G.
Yang, R.
Deil, C.
Wadiasingh, Z.
Khélifi, B.
Angüner, E. O.
van der Walt, D. J.
Moderski, R.
Schwanke, U.
Lypova, I.
O’Brien, P.
Brun, P.
Santangelo, A.
Völk, H. J.
Fiasson, A.
Zanin, R.
Specovius, A.
Jamrozy, Marek
Murach, T.
Tsuji, N.
Emery, G.
Devin, J.
Spanier, F.
Hermann, G.
Vasileiadis, G.
Condon, B.
Bernlöhr, K.
Ohm, S.
Schlickeiser, R.
van Soelen, B.
deWilt, P.
Sanchez, D. A.
Bregeon, J.
Becherini, Y.
Doroshenko, V.
Chandra, S.
Wagner, R. M.
Chakraborty, N.
Mohamed, M.
Kosack, K.
Barnard, M.
Holch, T. L.
Takahashi, T.
Bylund, T.
Mariaud, C.
Berge, D.
Wagner, S. J.
Becker Tjus, J.
Marx, R.
Lorentz, M.
Iwasaki, H.
Pita, S.
Prokoph, H.
Tsirou, M.
Parsons, R. D.
Punch, M.
Horns, D.
King, J.
Uchiyama, Y.
Boisson, C.
Padovani, M.
Zacharias, M.
Bernhard, S.
Ziegler, A.
Djannati-Ataï, A.
Niemiec, J.
Tiziani, D.
Krüger, P. P.
Panter, M.
Wierzcholska, Alicja
Fegan, S.
Abdalla, H.
Rudak, B.
Stawarz, Łukasz
Glawion, D.
Nakashima, S.
Sinha, A.
Hofmann, W.
Füßling, M.
Brun, F.
Marandon, V.
Jankowsky, D.
Katsuragawa, M.
Odaka, H.
Gottschall, D.
Trichard, C.
Katarzyński, K.
Heinzelmann, G.
Dmytriiev, A.
Petrucci, P.-O.
Aharonian, F.
Shafi, N.
van Eldik, C.
Glicenstein, J. F.
Simoni, R.
Terrier, R.
Bolmont, J.
Sasaki, M.
Stegmann, C.
Maurin, G.
Reimer, O.
Steppa, C.
Zefi, F.
Lemière, A.
Ait Benkhali, F.
Arakawa, M.
Sahakian, V.
Rowell, G.
Hoischen, C.
Arrieta, M.
López-Coto, R.
Colafrancesco, S.
Ernenwein, J.-P.
Hinton, J. A.
Grondin, M.-H.
Lefaucheur, J.
Ostrowski, Michał
Oya, I.
Taylor, A. M.
van Rensburg, C.
Capasso, M.
Krakau, S.
Zorn, J.
Jung-Richardt, I.
Bonnefoy, S.
Pühlhofer, G.
Tibaldo, L.
Quirrenbach, A.
Peyaud, B.
Raab, S.
Hahn, J.
Backes, M.
Schüssler, F.
Zdziarski, A. A.
Arcaro, C.
Eschbach, S.
Jankowsky, F.
Tluczykont, M.
Vink, J.
Klepser, S.
Shilon, I.
Caroff, S.
Büchele, M.
Martí-Devesa, G.
Sol, H.
Saito, S.
Rieger, F.
Seglar-Arroyo, M.
Haupt, M.
Jacholkowska, A.
Piel, Q.
Perennes, C.
Poireau, V.
Mohrmann, L.
Bordas, P.
Żywucka-Hejzner, Natalia
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Search for dark matter annihilation signatures in H.E.S.S. observations of dwarf spheroidal galaxies
Autorzy:
Laffon, H.
Schüssler, F.
Garrigoux, T.
Niemiec, J.
Holler, M.
Fegan, S.
Krayzel, F.
Dyrda, M.
Fontaine, G.
Odaka, H.
Bernhard, S.
Mayer, M.
Akhperjanian, A.
Santangelo, A.
Perez, J.
Gottschall, D.
Dyks, J.
Klochkov, D.
Lenain, J.-P.
Aharonian, F.
Becker Tjus, J.
Chakraborty, N.
Krakau, S.
Schwemmer, S.
Katz, U.
Willmann, P.
Giavitto, G.
Romoli, C.
Heinzelmann, G.
Wagner, S.
Balzer, A.
Domainko, W.
Kieffer, M.
Gallant, Y.
Bryan, M.
Ohm, S.
Taylor, A.
Henri, G.
Marcowith, A.
Lopatin, A.
Mohamed, M.
Wierzcholska, Alicja
Oya, I.
Wörnlein, A.
Giebels, B.
Paz Arribas, M.
Lohse, T.
Pelletier, G.
Völk, H.
Brun, P.
Ait Benkhali, F.
Harris, J.
Punch, M.
Vink, J.
Reimer, O.
Spieß, F.
Wagner, R.
Boisson, C.
Casanova, S.
Kolitzus, D.
Birsin, E.
Conrad, J.
Dalton, M.
Colafrancesco, S.
Lefaucheur, J.
Chaves, R.
Rulten, C.
Katarzyński, K.
Wouters, D.
Venter, C.
Jahn, C.
Kluźniak, W.
Bernlöhr, K.
Méhault, J.
Bulik, T.
Böttcher, M.
Brun, F.
Stegmann, C.
Kaufmann, S.
Tluczykont, M.
Glicenstein, J.
Veh, J.
Marandon, V.
van Eldik, C.
Chadwick, P.
Vorster, M.
Opitz, B.
Drury, L.
Hofverberg, P.
Hahn, J.
Stawarz, Łukasz
Janiak, M.
Eger, P.
Vincent, P.
Rudak, B.
Poon, H.
Tavernet, J.-P.
Serpico, P.
Bolmont, J.
Reimer, A.
Fiasson, A.
Trichard, C.
Lefranc, V.
Schlickeiser, R.
Renaud, M.
McComb, T.
Menzler, U.
Hervet, O.
Tavernier, T.
de Naurois, M.
Moulin, E.
Davids, I.
Kosack, K.
Yang, R.
Rosier-Lees, S.
Zabalza, V.
Schwarzburg, S.
Farnier, C.
Hillert, A.
Viana, A.
Maxted, N.
Fernandes, M. V.
Fernandez, D.
Gabici, S.
Salek, D.
Zaborov, D.
Häffner, S.
Grudzińska, M.
Degrange, B.
Ivascenko, A.
Vasileiadis, G.
Grondin, M.-H.
Jung, I.
Reichardt, I.
Ostrowski, Michał
Barnacka, Anna
Couturier, C.
Förster, A.
Balenderan, S.
Zacharias, M.
Djannati-Ataï, A.
Dubus, G.
Khélifi, B.
Zechlin, H.-S.
Hermann, G.
Jamrozy, Marek
Schwanke, U.
Weidinger, M.
Moderski, R.
Biteau, J.
Becherini, Y.
Jacholkowska, A.
Dutson, K.
Quirrenbach, A.
deWilt, P.
Bordas, P.
Lu, C.-C.
Krüger, P.
Lamanna, G.
Maurin, G.
White, R.
van Soelen, B.
Rowell, G.
Feinstein, F.
Rob, L.
Schulz, A.
Cologna, G.
Meyer, M.
Cui, Y.
Volpe, F.
Lemoine-Goumard, M.
Stinzing, F.
Zdziarski, A.
Backes, M.
Edwards, T.
Kastendieck, M. A.
Horns, D.
Peyaud, B.
Parsons, R.
Espigat, P.
Carrigan, S.
Marx, R.
Spengler, G.
Rieger, F.
Berge, D.
Lemière, A.
Ward, M.
Hadsch, D.
Bregeon, J.
Terrier, R.
Mitchell, A. M. W.
Abramowski, A.
Morå, K.
Pühlhofer, G.
Hofmann, W.
Chalme-Calvet, R.
Murach, T.
Angüner, E.
Egberts, K.
Sol, H.
Valerius, K.
Goudelis, A.
Pekeur, N. W.
Stycz, K.
Sushch, I.
Meintjes, P.
Petrucci, P.-O.
Raab, S.
Panter, M.
Jankowsky, F.
Gajdus, M.
Nolan, S. J.
Hinton, J.
Füßling, M.
Pita, S.
Sahakian, V.
Sanchez, D.
Weitzel, Q.
Chrétien, M.
Oakes, L.
Vuillaume, T.
Zech, A.
Deil, C.
Spanier, F.
de los Reyes, R.
Wagner, P.
Steenkamp, R.
Klepser, S.
Donath, A.
Komin, Nu.
Opis:
Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of nonthermal high-energy gamma-ray emission or intense star formation. Therefore they are among the most promising candidates for indirect dark matter searches. During the last years the High Energy Stereoscopic System (H.E.S.S.) of imaging atmospheric Cherenkov telescopes observed five of these dwarf galaxies for more than 140 hours in total, searching for TeV gamma-ray emission from annihilation of dark matter particles. The new results of the deep exposure of the Sagittarius dwarf spheroidal galaxy, the first observations of the Coma Berenices and Fornax dwarves and the reanalysis of two more dwarf spheroidal galaxies already published by the H.E.S.S. Collaboration, Carina and Sculptor, are presented. In the absence of a significant signal new constraints on the annihilation cross section applicable to weakly interacting massive particles (WIMPs) are derived by combining the observations of the five dwarf galaxies. The combined exclusion limit depends on the WIMP mass and the best constraint is reached at 1–2 TeV masses with a cross-section upper bound of $\sim 3.9 \times 10^{-24}cm^{3}s^{-1}$ at a 95% confidence level.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510−089 in early 2012
Autorzy:
Noda, K.
Zanin, R.
Bonnefoy, S.
Bangale, P.
Surić, T.
Manilla-Robles, A.
Carosi, A.
Bednarek, W.
Delgado Mendez, C.
Torres, D. F.
Zarpudin, B.
Bretz, T.
Hrupec, D.
La Barbera, A.
Ribó, M.
Treves, A.
Raiteri, C. M.
Schultz, C.
Villata, M.
Steinbring, T.
Lähteenmäki, A.
Chen, W. P.
Carnerero, M. I.
López-Oramas, A.
Readhead, A. C. S.
Satalecka, K.
Uellenbeck, M.
Barrio, J. A.
Temnikov, P.
Tammi, J.
Scapin, V.
Kellermann, H.
Marscher, A.
Partini, S.
Ansoldi, S.
López, M.
Verrecchia, F.
Aller, M. F.
Morozova, D. A.
Saito, T.
Orienti, M.
Dazzi, F.
Dominis Prester, D.
Doert, M.
Maneva, G.
Biland, A.
Barres de Almeida, U.
Font, L.
Mazin, D.
Shore, S. N.
Molina, S. N.
Nilsson, K.
Fuhrman, L.
Mallot, K.
Sitarek, J.
Dorner, D.
Nestoras, I.
Godinović, N.
Bonnoli, G.
Borracci, F.
Gurwell, M. A.
Lewandowska, N.
Fruck, C.
Kadenius, V.
Kurtanidze, S. O.
Hayashida, M.
Ferenc, D.
Gaug, M.
Ovcharov, E.
Tornikoski, M.
Hovatta, T.
Krause, J.
Konstantinova, T. S.
Overkemping, A.
Paredes-Fortuny, X.
Makariev, M.
Antoranz, P.
Marcote, B.
Takami, H.
Wagner, R. M.
Chigladze, R. A.
Mirzoyan, R.
Reinthal, R.
Fonseca, M. V.
Sillanpää, A.
Ungerechts, H.
Panwar, N.
Orito, R.
Prada Moroni, P. G.
Bernardini, E.
Herrero, A.
Jorstad, S.
Blinov, D. A.
Bozhilov, V.
Mundell, C.
Nishijima, K.
Domínguez, A.
Paneque, D.
Babic, A.
Stamatescu, V.
Toyama, T.
Lombardi, S.
Vercellone, S.
Contreras, J. L.
Eisenacher, D.
Menzel, U.
Buson, S.
Covino, S.
Max-Moerbeck, W.
Da Vela, P.
Colin, P.
Rodriguez Garcia, J.
Idec, W.
Herrera, J.
Palatiello, M.
Paiano, S.
Paoletti, R.
Persic, M.
Richards, J. L.
Preziuso, S.
Scalzotto, V.
Giroletti, M.
Einecke, S.
Zandanel, F.
Troitsky, I. S.
Doro, M.
Lucarelli, F.
D’Ammando, F.
Munar-Adrover, P.
Sobczynska, D.
Stawarz, Łukasz
González Muñoz, A.
Carmona, E.
Hose, J.
Miranda, J. M.
Gómez, J. L.
Teshima, M.
Tescaro, D.
Pavlova, Yu. V.
Rhode, W.
Kodani, K.
Rügamer, S.
Agudo, I.
Aller, H. D.
Nakajima, D.
De Lotto, B.
Aleksić, J.
Carreto Fidalgo, D.
Zensus, J. A.
Mankuzhiyil, N.
Schweizer, T.
García López, R. J.
Rico, J.
Larionova, E. G.
Lelas, D.
Sandrinelli, A.
Pittori, C.
Kopatskaya, E. N.
Kushida, J.
Elsaesser, D.
Vogler, P.
Stamerra, A.
Lorenz, E.
Farina, E.
Strzys, M.
Takalo, L.
Steele, I.
Hildebrand, D.
Casadio, C.
De Caneva, G.
Sun, S.
Thaele, J.
Prandini, E.
Angelakis, E.
Saggion, A.
Paredes, J. M.
Frantzen, K.
Gozzini, S. R.
Hadasch, D.
Garczarczyk, M.
Lozano, I.
Acosta-Pulido, J. A.
Spanier, F.
Terzić, T.
Snidaric, I.
Lin, H. C.
Puljak, I.
Moralejo, A.
Mannheim, K.
Konno, Y.
Metodieva, I.
Tavecchio, F.
Nowak, N.
Saito, K.
Prada, F.
De Angelis, A.
Kurtanidze, O. M.
Larionova, L. V.
Sievers, A.
Martínez, M.
Garrido Terrats, D.
Niedzwiecki, A.
Colombo, E.
Antonelli, L. A.
Lindfors, E.
Storz, J.
Larionov, V. M.
Mariotti, M.
Krichbaum, T. P.
Maraschi, L.
López-Coto, R.
Blanch, O.
Cortina, J.
Meucci, M.
Becerra, González J.
Tibolla, O.
Mokrushina, A. A.
Nikolashvili, M. G.
Kubo, H.
Opis:
Aims. Amongst more than fifty blazars detected in very high energy (VHE, E> 100 GeV) γ rays, only three belong to the subclass of flat spectrum radio quasars (FSRQs). The detection of FSRQs in the VHE range is challenging, mainly because of their soft spectra in the GeV-TeV regime. MAGIC observed PKS 1510−089 (z = 0.36) starting 2012 February 3 until April 3 during a high activity state in the high energy (HE, E> 100 MeV) $\gamma$-ray band observed by AGILE and Fermi. MAGIC observations result in the detection of a source with significance of 6.0 standard deviations (σ). We study the multi-frequency behaviour of the source at the epoch of MAGIC observation, collecting quasi-simultaneous data at radio and optical (GASP-WEBT and F-Gamma collaborations, REM, Steward, Perkins, Liverpool, OVRO, and VLBA telescopes), X-ray (Swift satellite), and HE $\gamma$-ray frequencies. Methods. We study the VHE $\gamma$-ray emission, together with the multi-frequency light curves, 43 GHz radio maps, and spectral energy distribution (SED) of the source. The quasi-simultaneous multi-frequency SED from the millimetre radio band to VHE γ rays is modelled with a one-zone inverse Compton model. We study two different origins of the seed photons for the inverse Compton scattering, namely the infrared torus and a slow sheath surrounding the jet around the Very Long Baseline Array (VLBA) core. Results. We find that the VHE $\gamma$-ray emission detected from PKS 1510−089 in 2012 February-April agrees with the previous VHE observations of the source from 2009 March-April. We find no statistically significant variability during the MAGIC observations on daily, weekly, or monthly time scales, while the other two known VHE FSRQs (3C 279 and PKS 1222+216) have shown daily scale to sub-hour variability. The $\gamma$-ray SED combining AGILE, Fermi and MAGIC data joins smoothly and shows no hint of a break. The multi-frequency light curves suggest a common origin for the millimetre radio and HE $\gamma$-ray emission, and the HE $\gamma$-ray flaring starts when the new component is ejected from the 43 GHz VLBA core and the studied SED models fit the data well. However, the fast HE $\gamma$-ray variability requires that within the modelled large emitting region, more compact regions must exist. We suggest that these observed signatures would be most naturally explained by a turbulent plasma flowing at a relativistic speed down the jet and crossing a standing conical shock.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
H.E.S.S. reveals a lack of TeV emission from the supernova remnant Puppis A
Autorzy:
Farnier, C.
Hinton, J. A.
Katarzyński, K.
Viana, A.
Bolmont, J.
Tavernet, J.-P.
van Soelen, B.
Backes, M.
Chrétien, M.
Dyks, J.
Stinzing, F.
Reimer, A.
Vorster, M.
Odaka, H.
Davids, I. D.
Gallant, Y. A.
Kluźniak, W.
Deil, C.
Sol, H.
Abramowski, A.
Conrad, J.
Fernandez, D.
Cui, Y.
Rudak, B.
Oya, I.
Spengler, G.
Terrier, R.
Kastendieck, M. A.
Chakraborty, N.
Sushch, I.
Edwards, T.
Chaves, R. C. G.
Giavitto, G.
Lohse, T.
Horns, D.
Meyer, M.
Barnacka, Anna
Lenain, J.-P.
Boisson, C.
Jahn, C.
Becker Tjus, J.
Bregeon, J.
Steenkamp, R.
Veh, J.
Klepser, S.
Krakau, S.
van Eldik, C.
Balenderan, S.
Balzer, A.
Spanier, F.
Wierzcholska, Alicja
Jacholkowska, A.
Birsin, E.
Wagner, S. J.
Taylor, A. M.
Akhperjanian, A. G.
Kosack, K.
Dubus, G.
Brun, F.
Bernhard, S.
Krüger, P. P.
Laffon, H.
Lefaucheur, J.
Marx, R.
Schwarzburg, S.
Volpe, F.
Vuillaume, T.
Henri, G.
Valerius, K.
Berge, D.
Ohm, S.
Tluczykont, M.
Janiak, M.
Pühlhofer, G.
Böttcher, M.
Romoli, C.
Domainko, W.
Mitchell, A. M. W.
Yang, R.
Schlickeiser, R.
Hofmann, W.
Hervet, O.
Jung-Richardt, I.
Reichardt, I.
Völk, H. J.
Rieger, F.
Eger, P.
de los Reyes, R.
Füßling, M.
Hillert, A.
Spies, F.
Espigat, P.
Stycz, K.
Dyrda, M.
Ostrowski, Michał
Lefranc, V.
Schwanke, U.
Raab, S.
Paz Arribas, M.
Maxted, N.
Rosier-Lees, S.
Zacharias, M.
Hermann, G.
Moulin, E.
Peyaud, B.
Rowell, G.
Couturier, C.
Menzler, U.
Glicenstein, J. F.
Renaud, M.
Schulz, A.
Bordas, P.
Drury, L. O’C.
Kaufmann, S.
Santangelo, A.
Rulten, C. B.
Fegan, S.
Zech, A.
White, R.
Tavernier, T.
Donath, A.
Feinstein, F.
Ward, M.
Kolitzus, D.
Förster, A.
Holler, M.
McComb, T. J. L.
Hahn, J.
Grondin, M.-H.
Mayer, M.
Fontaine, G.
Krayzel, F.
Trichard, C.
Casanova, S.
Vasileiadis, G.
Aharonian, F.
Bryan, M.
Chadwick, P. M.
Dutson, K.
Lamanna, G.
Cologna, G.
Bulik, T.
Schwemmer, S.
Chalme-Calvet, R.
Biteau, J.
Wagner, P.
Gabici, S.
Sanchez, D. A.
Pekeur, N. W.
Petrucci, P.-O.
Opitz, B.
Fiasson, A.
Marandon, V.
de Naurois, M.
Kieffer, M.
Lopatin, A.
Méhault, J.
Wörnlein, A.
Venter, C.
Poon, H.
Lu, C.-C.
Jamrozy, Marek
Schüssler, F.
Colafrancesco, S.
Quirrenbach, A.
Klochkov, D.
Hadasch, D.
Jankowsky, F.
Gajdus, M.
Zdziarski, A. A.
Zaborov, D.
Häffner, S.
Mohamed, M.
Nolan, S. J.
Oakes, L.
Ivascenko, A.
Pelletier, G.
Carrigan, S.
Lemière, A.
Khélifi, B.
Punch, M.
Wagner, R. M.
Giebels, B.
Garrigoux, T.
Stegmann, C.
Vincent, P.
Zabalza, V.
Parsons, R. D.
Zechlin, H.-S.
Heinzelmann, G.
Murach, T.
Panter, M.
Harris, J.
Niemiec, J.
Morå, K.
Sahakian, V.
Egberts, K.
Moderski, R.
Weidinger, M.
Wouters, D.
Ait Benkhali, F.
Fernandes, M. V.
Hofverberg, P.
Weitzel, Q.
Vink, J.
Grudzińska, M.
Djannati-Ataï, A.
Gottschall, D.
Degrange, B.
Willmann, P.
Angüner, E. O.
Salek, D.
Reimer, O.
Maurin, G.
Bernlöhr, K.
Katz, U.
Brun, P.
Marcowith, A.
Stawarz, Łukasz
deWilt, P.
Pita, S.
Becherini, Y.
Lemoine-Goumard, M.
Komin, Nu.
Meintjes, P. J.
Opis:
Context. Puppis A is an interesting ~4 kyr-old supernova remnant (SNR) that shows strong evidence of interaction between the forward shock and a molecular cloud. It has been studied in detail from radio frequencies to high-energy (HE, 0.1−100 GeV) γ-rays. An analysis of the Fermi-LAT data has shown extended HE $\gamma$-ray emission with a 0.2−100 GeV spectrum exhibiting no significant deviation from a power law, unlike most of the GeV-emitting SNRs known to be interacting with molecular clouds. This makes it a promising target for imaging atmospheric Cherenkov telescopes (IACTs) to probe the $\gamma$-ray emission above 100 GeV. Aims. Very-high-energy (VHE, E ≥ 0.1 TeV) $\gamma$-ray emission from Puppis A has been, for the first time, searched for with the High Energy Stereoscopic System (H.E.S.S.). Methods. Stereoscopic imaging of Cherenkov radiation from extensive air showers is used to reconstruct the direction and energy of the incident γ-rays in order to produce sky images and source spectra. The profile likelihood method is applied to find constraints on the existence of a potential break or cutoff in the photon spectrum. Results. The analysis of the H.E.S.S. data does not reveal any significant emission towards Puppis A. The derived upper limits on the differential photon flux imply that its broadband $\gamma$-ray spectrum must exhibit a spectral break or cutoff. By combining Fermi-LAT and H.E.S.S. measurements, the 99% confidence-level upper limits on such a cutoff are found to be 450 and 280 GeV, assuming a power law with a simple exponential and a sub-exponential cutoff, respectively. It is concluded that none of the standard limitations (age, size, radiative losses) on the particle acceleration mechanism, assumed to be continuing at present, can explain the lack of VHE signal. The scenario in which particle acceleration has ceased some time ago is considered as an alternative explanation. The HE/VHE spectrum of Puppis A could then exhibit a break of non-radiative origin (as observed in several other interacting SNRs, albeit at somewhat higher energies), owing to the interaction with dense and neutral material, in particular towards the NE region.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Constraints on an annihilation signal from a core of constant dark matter density around the Milky Way center with H.E.S.S.
Autorzy:
Mitchell, A. M. W.
Ward, M.
Rowell, G.
Akhperjanian, A. G.
Zechlin, H.-S.
Marx, R.
Glicenstein, J. F.
Häffner, S.
Sanchez, D. A.
Klochkov, D.
Völk, H. J.
Morå, K.
Fernandes, M. V.
Jamrozy, Marek
Petrucci, P.-O.
Pühlhofer, G.
Wagner, P.
Meyer, M.
Ivascenko, A.
Angüner, E. O.
Krayzel, F.
Méhault, J.
Odaka, H.
Pita, S.
Chalme-Calvet, R.
Lefaucheur, J.
Vasileiadis, G.
Becker Tjus, J.
Harris, J.
Ostrowski, Michał
Schulz, A.
Böttcher, M.
Sushch, I.
Paz Arribas, M.
Pekeur, N. W.
Tavernier, T.
White, R.
Dutson, K.
Kluźniak, W.
Wouters, D.
Fegan, S.
Oakes, L.
Weitzel, Q.
Renaud, M.
Reimer, A.
Bernhard, S.
Rulten, C. B.
Fernandez, D.
Biteau, J.
Giavitto, G.
Cui, Y.
Cologna, G.
Pelletier, G.
de Naurois, M.
Lenain, J.-P.
Deil, C.
Dyks, J.
Edwards, T.
deWilt, P.
Reimer, O.
Opitz, B.
Zech, A.
Bulik, T.
Meintjes, P. J.
Stycz, K.
Horns, D.
Sol, H.
Sahakian, V.
Wagner, R. M.
Egberts, K.
Casanova, S.
Trichard, C.
Holler, M.
Hofmann, W.
Laffon, H.
Janiak, M.
Ait Benkhali, F.
Lamanna, G.
Lemoine-Goumard, M.
Schwemmer, S.
Farnier, C.
Schüssler, F.
Kaufmann, S.
Lefranc, V.
Schlickeiser, R.
Vincent, P.
Degrange, B.
Yang, R.
Wagner, S. J.
Bernlöhr, K.
van Soelen, B.
Kosack, K.
Brun, P.
Rudak, B.
Romoli, C.
Gottschall, D.
Drury, L. O’C.
Santangelo, A.
Boisson, C.
Hahn, J.
Jankowsky, F.
Willmann, P.
Zdziarski, A. A.
Mayer, M.
Dyrda, M.
Rosier-Lees, S.
Davids, I. D.
Kastendieck, M. A.
Valerius, K.
Bregeon, J.
Jung-Richardt, I.
Katarzyński, K.
Katz, U.
Brun, F.
Stinzing, F.
Domainko, W.
Balzer, A.
Colafrancesco, S.
Hinton, J. A.
Rieger, F.
Wierzcholska, Alicja
Bryan, M.
Feinstein, F.
Lemière, A.
Zaborov, D.
Krüger, P. P.
Hervet, O.
Stawarz, Łukasz
Carrigan, S.
Niemiec, J.
Hillert, A.
Bolmont, J.
Conrad, J.
Chaves, R. C. G.
Abramowski, A.
Lohse, T.
Backes, M.
de los Reyes, R.
Berge, D.
Venter, C.
Henri, G.
Oya, I.
Couturier, C.
Aharonian, F.
Viana, A.
Vuillaume, T.
Terrier, R.
Khélifi, B.
Steenkamp, R.
Moderski, R.
Nolan, S. J.
Taylor, A. M.
Veh, J.
Becherini, Y.
Parsons, R. D.
Vorster, M.
Stegmann, C.
Zacharias, M.
Fiasson, A.
Marandon, V.
Chakraborty, N.
Krakau, S.
Volpe, F.
Garrigoux, T.
Gajdus, M.
Reichardt, I.
Tluczykont, M.
Gabici, S.
Vink, J.
Giebels, B.
Heinzelmann, G.
Marcowith, A.
Kolitzus, D.
Hadasch, D.
Eger, P.
Spanier, F.
Djannati-Ataï, A.
Moulin, E.
Förster, A.
Espigat, P.
McComb, T. J. L.
van Eldik, C.
Schwanke, U.
Wörnlein, A.
Chrétien, M.
Ohm, S.
Grudzińska, M.
Lopatin, A.
Dubus, G.
Grondin, M.-H.
Gallant, Y. A.
Hofverberg, P.
Jahn, C.
Komin, Nu.
Lu, C.-C.
Poon, H.
Spengler, G.
Murach, T.
Punch, M.
Chadwick, P. M.
Donath, A.
Spies, F.
Balenderan, S.
Peyaud, B.
Füßling, M.
Maurin, G.
Jacholkowska, A.
Fontaine, G.
Salek, D.
Weidinger, M.
Barnacka, Anna
Menzler, U.
Hermann, G.
Mohamed, M.
Raab, S.
Zabalza, V.
Quirrenbach, A.
Bordas, P.
Klepser, S.
Maxted, N.
Tavernet, J.-P.
Kieffer, M.
Schwarzburg, S.
Birsin, E.
Panter, M.
Opis:
An annihilation signal of dark matter is searched for from the central region of the Milky Way. Data acquired in dedicated on-off observations of the Galactic center region with H.E.S.S. are analyzed for this purpose. No significant signal is found in a total of $\sim$ 9 h of on-off observations. Upper limits on the velocity averaged cross section, $\left \langle \sigma \upsilon \right \rangle$, for the annihilation of dark matter particles with masses in the range of $\sim$ 300 GeV to $\sim$ 10 TeV are derived. In contrast to previous constraints derived from observations of the Galactic center region, the constraints that are derived here apply also under the assumption of a central core of constant dark matter density around the center of the Galaxy. Values of $\left \langle \sigma\ upsilon \right \rangle$ that are larger than $3 \times 10^{-24} cm^{3}$ / s are excluded for dark matter particles with masses between $\sim$ 1 and $\sim$ 4 TeV at 95% C.L. if the radius of the central dark matter density core does not exceed 500 pc. This is the strongest constraint that is derived on $\left \langle \sigma \upsilon \right \rangle$ for annihilating TeV mass dark matter without the assumption of a centrally cusped dark matter density distribution in the search region.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The 2012 flare of PG 1553+113 seen with H.E.S.S. and Fermi-LAT
Autorzy:
Laffon, H.
Schüssler, F.
Garrigoux, T.
Niemiec, J.
Naurois, M. de
Holler, M.
Fegan, S.
Krayzel, F.
Dyrda, M.
Fontaine, G.
Meintjes, P. J.
Odaka, H.
Bernhard, S.
Mayer, M.
Santangelo, A.
Perez, J.
Gottschall, D.
Dyks, J.
Klochkov, D.
Lenain, J.-P.
Aharonian, F.
Eldik, C. van
Tjus, J. Becker
Chakraborty, N.
Krakau, S.
Schwemmer, S.
Katz, U.
Willmann, P.
Giavitto, G.
Drury, L. O’C.
Romoli, C.
Heinzelmann, G.
Balzer, A.
Reyes, R. de los
Domainko, W.
Kieffer, M.
Bryan, M.
Ohm, S.
Henri, G.
Marcowith, A.
Lopatin, A.
Mohamed, M.
Sanchez, D. A.
Wierzcholska, Alicja
Oya, I.
Wörnlein, A.
Giebels, B.
Lohse, T.
Pelletier, G.
Brun, P.
Punch, M.
Harris, J.
Vink, J.
Reimer, O.
Chadwick, P. M.
Boisson, C.
Casanova, S.
Kolitzus, D.
Birsin, E.
Conrad, J.
Rulten, C. B.
Dalton, M.
Colafrancesco, S.
Lefaucheur, J.
Katarzyński, K.
Wouters, D.
Venter, C.
Jahn, C.
Kluźniak, W.
Bernlöhr, K.
Méhault, J.
Bulik, T.
Böttcher, M.
Brun, F.
Stegmann, C.
Kaufmann, S.
Tluczykont, M.
Veh, J.
Marandon, V.
Vorster, M.
Opitz, B.
Hofverberg, P.
Hahn, J.
Hinton, J. A.
Stawarz, Łukasz
Janiak, M.
Benkhali, F. Ait
Eger, P.
Rudak, B.
Vincent, P.
Poon, H.
Tavernet, J.-P.
Arribas, M. Paz
Bolmont, J.
Reimer, A.
McComb, T. J. L.
Trichard, C.
Lefranc, V.
Angüner, E. O.
Schlickeiser, R.
Renaud, M.
Menzler, U.
Hervet, O.
Tavernier, T.
Moulin, E.
Kosack, K.
Yang, R.
Rosier-Lees, S.
Zabalza, V.
Schwarzburg, S.
Farnier, C.
Hillert, A.
Viana, A.
Maxted, N.
Fernandes, M. V.
Fernandez, D.
Gabici, S.
Salek, D.
Zaborov, D.
Häffner, S.
Grudzińska, M.
Degrange, B.
Taylor, A. M.
Ivascenko, A.
Vasileiadis, G.
Grondin, M.-H.
Wagner, R. M.
Jung, I.
Reichardt, I.
Davids, I. D.
Ostrowski, Michał
Barnacka, Anna
Couturier, C.
Förster, A.
Balenderan, S.
Zacharias, M.
FüSSling, M.
Djannati-Ataï, A.
Dubus, G.
Khélifi, B.
Zechlin, H.-S.
Hermann, G.
Jamrozy, Marek
Schwanke, U.
Weidinger, M.
Moderski, R.
Biteau, J.
Becherini, Y.
Jacholkowska, A.
Dutson, K.
Quirrenbach, A.
Fiaßon, A.
deWilt, P.
Bordas, P.
Lu, C.-C.
Lamanna, G.
Maurin, G.
White, R.
Rowell, G.
Feinstein, F.
Rob, L.
Schulz, A.
Cologna, G.
Meyer, M.
Cui, Y.
Volpe, F.
Lemoine-Goumard, M.
Stinzing, F.
Backes, M.
Edwards, T.
Kastendieck, M. A.
Horns, D.
Peyaud, B.
Espigat, P.
Carrigan, S.
Marx, R.
Glicenstein, J. F.
Spengler, G.
Rieger, F.
Gallant, Y. A.
Akhperjanian, A. G.
Berge, D.
Ward, M.
Hadsch, D.
Bregeon, J.
Krüger, P. P.
Terrier, R.
Mitchell, A. M. W.
Abramowski, A.
Morå, K.
Parsons, R. D.
Pühlhofer, G.
Hofmann, W.
Spies, F.
Chalme-Calvet, R.
Murach, T.
Soelen, B. van
Egberts, K.
Sol, H.
Valerius, K.
Pekeur, N. W.
Stycz, K.
Sushch, I.
Chaves, R. C. G.
Petrucci, P.-O.
Raab, S.
Collaboration
Panter, M.
Jankowsky, F.
Völk, H. J.
Lemiére, A.
Gajdus, M.
Nolan, S. J.
Pita, S.
Sahakian, V.
Weitzel, Q.
Chrétien, M.
Oakes, L.
Vuillaume, T.
Zdziarski, A. A.
Deil, C.
Spanier, F.
Zech, A.
Wagner, P.
Steenkamp, R.
Klepser, S.
Donath, A.
Komin, Nu.
Opis:
Very high energy (VHE, E > 100 GeV) $\gamma$-ray flaring activity of the high-frequency peaked BL Lac object PG 1553+113 has been detected by the H.E.S.S. telescopes. The flux of the source increased by a factor of 3 during the nights of 2012 April 26 and 27 with respect to the archival measurements with a hint of intra-night variability. No counterpart of this event has been detected in the Fermi-Large Area Telescope data. This pattern is consistent with VHE $\gamma$-ray flaring being caused by the injection of ultrarelativistic particles, emitting $\gamma$-rays at the highest energies. The dataset offers a unique opportunity to constrain the redshift of this source at z = 0.49 $\pm$ 0.04 using a novel method based on Bayesian statistics. The indication of intra-night variability is used to introduce a novel method to probe for a possible Lorentz invariance violation (LIV), and to set limits on the energy scale at which Quantum Gravity (QG) effects causing LIV may arise. For the subluminal case, the derived limits are $E_{QG,1} > 4.10 \times 10^{17}$ GeV and $E_{QG,2} > 2.10 \times 10^{10}$ GeV for linear and quadratic LIV effects, respectively.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Acceleration of petaelectronvolt protons in the Galactic Centre
Autorzy:
Holler, M.
Schulz, A.
Voisin, F.
Renaud, M.
Vuillaume, T.
Dutson, K.
Feinstein, F.
Cui, Y.
Eger, P.
Pelletier, G.
Vincent, P.
Davids, I. D.
Laffon, H.
Seyffert, A. S.
Schwemmer, S.
Weitzel, Q.
Katz, U.
Dyrda, M.
Komin, Nu.
Bulik, T.
Poon, H.
Wouters, D.
Marcowith, A.
Dyks, J.
Bryan, M.
Donath, A.
Gallant, Y. A.
Fernandes, M. V.
Reimer, A.
Lemiére, A.
Hadasch, D.
Lau, J.
Egberts, K.
Meintjes, P. J.
Espigat, P.
Kieffer, M.
Tavernet, J.-P.
White, R.
Fontaine, G.
Chen, A.
Steenkamp, R.
van der Walt, J.
Gabici, S.
Hofverberg, P.
Blackwell, R.
Kluźniak, W.
Oakes, L.
Krayzel, F.
Mitchell, A. M. W.
Venter, C.
Spengler, G.
Tavernier, T.
Mayer, M.
Lamanna, G.
Zaborov, D.
Kerszberg, D.
Chrétien, M.
Lenain, J.-P.
Lemoine-Goumard, M.
Moulin, E.
Cologna, G.
Janiak, M.
Carr, J.
de Naurois, M.
Lohse, T.
Henri, G.
Sushch, I.
Veh, J.
Zech, A.
Romoli, C.
Tuffs, R.
Spies, F.
Häffner, S.
Pekeur, N. W.
Kastendieck, M. A.
Böttcher, M.
Giavitto, G.
Degrange, B.
Chaves, R. C. G.
Opitz, B.
Yang, R.
Deil, C.
Khélifi, B.
Angüner, E. O.
Akhperjanian, A. G.
Meyer, M.
Moderski, R.
Schwanke, U.
Völk, H. J.
Santangelo, A.
Brun, P.
Żywucka-Hejzner, Natalia
Fiasson, A.
Jamrozy, Marek
Murach, T.
Fernandez, D.
Spanier, F.
Hermann, G.
Vasileiadis, G.
Ohm, S.
Bernlöhr, K.
Stycz, K.
Schlickeiser, R.
van Soelen, B.
Domainko, W.
Sanchez, D. A.
Bregeon, J.
Becherini, Y.
Lopatin, A.
Reichardt, I.
Giebels, B.
de Los Reyes, R.
Wagner, R. M.
Chakraborty, N.
Mohamed, M.
Kosack, K.
Lu, C.-C.
Mariaud, C.
Berge, D.
Wagner, S. J.
Becker Tjus, J.
Couturier, C.
Edwards, T.
Marx, R.
Chalme-Calvet, R.
Pita, S.
Viana, A.
Prokoph, H.
Parsons, R. D.
Punch, M.
Drury, L. O’C.
Stinzing, F.
Weidinger, M.
Rulten, C. B.
Horns, D.
Boisson, C.
Zacharias, M.
Bernhard, S.
Öttl, S.
Djannati-Ataï, A.
Niemiec, J.
Salek, D.
Balzer, A.
Krüger, P. P.
Lefranc, V.
Panter, M.
Wierzcholska, Alicja
Fegan, S.
Morå, K.
Rudak, B.
Stawarz, Łukasz
Rosier-Lees, S.
Hofmann, W.
Gajdus, M.
Hillert, A.
Füßling, M.
Garrigoux, T.
Brun, F.
Willmann, P.
Ivascenko, A.
Marandon, V.
Odaka, H.
Gottschall, D.
Trichard, C.
Katarzyński, K.
Heinzelmann, G.
van Eldik, C.
Petrucci, P.-O.
Aharonian, F.
Glicenstein, J. F.
Simoni, R.
Conrad, J.
Menzler, U.
Grudzińska, M.
Terrier, R.
Bolmont, J.
Sasaki, M.
Stegmann, C.
Maurin, G.
Reimer, O.
Abramowski, A.
Zefi, F.
Klochkov, D.
Sahakian, V.
Rowell, G.
Hoischen, C.
Colafrancesco, S.
Ernenwein, J.-P.
Farnier, C.
Grondin, M.-H.
Hinton, J. A.
Lefaucheur, J.
Ostrowski, Michał
Hawkes, J.
Oya, I.
Taylor, A. M.
Krakau, S.
Casanova, S.
Wagner, P.
Jung-Richardt, I.
Lui, R.
Pühlhofer, G.
Quirrenbach, A.
Peyaud, B.
Raab, S.
Maxted, N.
Wörnlein, A.
Hahn, J.
Backes, M.
Kolitzus, D.
Schüssler, F.
Valerius, K.
Zdziarski, A. A.
Tluczykont, M.
Jankowsky, F.
Förster, A.
Hervet, O.
Vink, J.
Zabalza, V.
Klepser, S.
Arribas, M. Paz
Sol, H.
Rieger, F.
Jacholkowska, A.
Birsin, E.
Dubus, G.
Bordas, P.
Dewilt, P.
Goyal, Arti
Benkhali, F. Ait
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
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