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Tytuł:
Curvature in the very-high energy gamma-ray spectrum of M 87
Autorzy:
Schutte, H. M.
Montanari, A.
Marx, R.
Kundu, A.
Glicenstein, J. F.
Żywucka, N.
Jamrozy, Marek
Pühlhofer, G.
Meyer, M.
Damascene Mbarubucyeye, J.
Pita, S.
Zilberman, P.
Joshi, V.
Le Stum, S.
Böttcher, M.
Chibueze, O.
Ren, H.
Aschersleben, J.
Bradascio, F.
de Bony de Lavergne, M.
Mackey, J.
Kluźniak, W.
Fegan, S.
Mitchell, A.
Reimer, A.
Reville, B.
de Naurois, M.
Lenain, J.-P.
Chandra, S.
Reimer, O.
Funk, S.
Bulik, T.
Horns, D.
Sahakian, V.
Lang, R. G.
Egberts, K.
Casanova, S.
Moghadam, M. O.
Holler, M.
Brose, R.
Hofmann, W.
Tanaka, T.
Ait Benkhali, F.
Lemoine-Goumard, M.
Tsirou, M.
Takahashi, T.
Schüssler, F.
Batzofin, R.
Ruiz-Velasco, E.
Collins, T.
Mehta, A.
Wagner, S. J.
Bernlöhr, K.
Kosack, K.
Rudak, B.
Santangelo, A.
Spencer, S.
Zdziarski, A. A.
Boisson, C.
Jankowsky, F.
Shapopi, J. N. S.
Bruno, B.
Luashvili, A.
Cotter, G.
Khatoon, R.
Celic, J.
Leitl, F.
Jung-Richardt, I.
Katarzyński, K.
Brun, F.
Einecke, S.
Dmytriiev, A.
Panny, S.
Chibueze, J.
Steppa, C.
Rieger, F.
Ashkar, H.
Cerruti, M.
Barbosa Martins, V.
Lemière, A.
Sasaki, M.
Chand, T.
Stawarz, Łukasz
Niemiec, J.
Bolmont, J.
de Ona Wilhelmi, E.
Backes, M.
Berge, D.
Venter, C.
Pensec, U.
Aharonian, F.
Terrier, R.
Malyshev, D.
Khélifi, B.
Steenkamp, R.
Moderski, R.
Taylor, A. M.
Chen, A.
Becherini, Y.
Parsons, R. D.
Haerer, L.
Regeard, M.
Zacharias, M.
Burger-Scheidlin, C.
Holch, T. L.
Gabici, S.
Vink, J.
Kostunin, D.
Djuvsland, J.
Grolleron, G.
Wierzcholska, A.
Lypova, I.
Djannati-Ataï, A.
Moulin, E.
Steinmassl, S.
van Eldik, C.
Martí-Devesa, G.
Ohm, S.
Olivera-Nieto, L.
Bylund, T.
Kasai, E.
Streil, K.
Wach, T.
Cecil, R.
Zech, A.
Komin, Nu.
Salzmann, H.
Murach, T.
Punch, M.
Fontaine, G.
Mohrmann, L.
Quirrenbach, A.
Glombitza, J.
Sol, H.
Panter, M.
Opis:
The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully understood. In this study, we investigate the VHE gamma-ray spectrum of M 87 during states of high gamma-ray activity, utilizing 20.2 h of H.E.S.S. observations. Our findings indicate a preference for a curved spectrum, characterized by a log-parabola model with extra-galactic background light (EBL) model above 0.3 TeV at the 4σ level, compared to a power-law spectrum with EBL. We investigate the degeneracy between the absorption feature and the EBL normalization and derive upper limits on EBL models that are mainly sensitive in the wavelength range of 12.4 μm–40 μm.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Constraints on the Intergalactic Magnetic Field using Fermi-LAT and H.E.S.S. Blazar Observations
Autorzy:
Mitchell, A.
Takahashi, T.
Glicenstein, J. F.
Thorpe-Morgan, C.
de Bony, M.
Chibueze, O.
Marx, R.
Funk, S.
Schwanke, U.
Martí-Devesa, G.
Marcowith, A.
de Ona Wilhelmi, E.
Backes, M.
Aharonian, F.
Quirrenbach, A.
Lenain, J. -P.
Lang, R. G.
Ohm, S.
Steinmassl, S.
Mohrmann, L.
Goswami, P.
Malyshev, D.
Venter, C.
Le Stum, S.
Lemière, A.
Kluźniak, W.
Tanaka, T.
Füssling, M.
Jamrozy, Marek
Panter, M.
Jankowsky, F.
Bylund, T.
Wong, Yu Wun
Reimer, A.
Reichherzer, P.
Egberts, K.
Murach, T.
Burger-Scheidlin, C.
White, R.
Leuschner, F.
Chen, A.
Ghafourizadeh, S.
Leitl, F.
Schüssler, F.
Martins, V. Barbosa
Bulik, T.
Sanchez, D. A.
Marchegiani, P.
Breuhaus, M.
Pühlhofer, G.
Aschersleben, J.
Wagner, S. J.
Joshi, V.
Zdziarski, A. A.
Terrier, R.
Uchiyama, Y.
Sasaki, M.
Jung-Richardt, I.
Ruiz-Velasco, E.
Panny, S.
Niemiec, J.
Peron, G.
Bouyahiaoui, M.
Muller, J.
Grondin, M. -H.
Marandon, V.
Rudak, B.
Taylor, A. M.
Holch, T. L.
Horns, D.
Kosack, K.
Montanari, A.
Katarzyński, K.
Sol, H.
Wierzcholska, Alicja
Glawion, D.
Meyer, M.
Celic, J.
Lohse, T.
Brun, F.
Reville, B.
Fontaine, G.
Chandra, S.
Caroff, S.
Zargaryan, D.
Brose, R.
Gabici, S.
Sahakian, V.
Spencer, S.
Lypova, I.
Kostunin, D.
Berge, D.
Mackey, J.
Khatoon, R.
Kasai, E.
Rowell, G.
Suzuki, H.
Punch, M.
Parsons, R. D.
Tsuji, N.
Veh, J.
Ernenwein, J. -P.
Cotter, G.
Giavitto, G.
Prokhorov, D. A.
Prokoph, H.
Żywucka, N.
Chand, T.
Tsirou, M.
Casanova, S.
Reimer, O.
Haerer, L.
Fichet de Clairfontaine, G.
Nakashima, K.
Rieger, F.
Moulin, E.
Shapopi, J. N. S.
Becherini, Y.
Batzofin, R.
van Eldik, C.
Zacharias, M.
Khélifi, B.
Holler, M.
Bi, B.
Luashvili, A.
Bruno, B.
Cerruti, M.
Filipovic, M.
Zouari, S.
Chibueze, J.
Komin, Nu.
Moderski, R.
Olivera-Nieto, L.
Schutte, H. M.
Opis:
Magnetic fields in galaxies and galaxy clusters are believed to be the result of the amplification of intergalactic seed fields during the formation of large-scale structures in the universe. However, the origin, strength, and morphology of this intergalactic magnetic field (IGMF) remain unknown. Lower limits on (or indirect detection of) the IGMF can be obtained from observations of high-energy gamma rays from distant blazars. Gamma rays interact with the extragalactic background light to produce electron−positron pairs, which can subsequently initiate electromagnetic cascades. The gamma-ray signature of the cascade depends on the IGMF since it deflects the pairs. Here we report on a new search for this cascade emission using a combined data set from the Fermi Large Area Telescope and the High Energy Stereoscopic System. Using state-of-the-art Monte Carlo predictions for the cascade signal, our results place a lower limit on the IGMF of B > 7.1 × 10$^{-16}$ G for a coherence length of 1 Mpc even when blazar duty cycles as short as 10 yr are assumed. This improves on previous lower limits by a factor of 2. For longer duty cycles of 10$^{4}$ (10$^{7}$) yr, IGMF strengths below 1.8 × 10$^{-14}$ G (3.9 × 10$^{-14}$ G) are excluded, which rules out specific models for IGMF generation in the early universe.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey
Autorzy:
de Clairfontaine, G. Fichet
Holler, M.
Funk, S.
Renaud, M.
Baghmanyan, V.
Katz, U.
Senniappan, M.
Zargaryan, D.
Komin, Nu.
Ruiz-Velasco, E.
Cerruti, M.
de Lavergne, M. de Bony
Armand, C.
Noel, Angel
Reimer, A.
Egberts, K.
White, R.
Fontaine, G.
Chen, A.
Gabici, S.
Kluźniak, W.
Kostunin, D.
Montanari, A.
Żywucka, N.
Bi, B.
Lamanna, G.
Lemoine-Goumard, M.
Moulin, E.
de Naurois, M.
Lohse, T.
Leuschner, F.
Malyshev, D.
Veh, J.
Zech, A.
Steinmassl, S.
Böttcher, M.
Chand, T.
Giavitto, G.
Khélifi, B.
Angüner, E. O.
Batzofin, R.
Meyer, M.
Moderski, R.
Schwanke, U.
Lypova, I.
Santangelo, A.
Fiasson, A.
Brose, R.
Specovius, A.
Jamrozy, Marek
Tsuji, N.
Devin, J.
Thorpe-Morgan, C.
Ohm, S.
Bernlöhr, K.
Lenain, J. -P.
Huang, Zhiqiu
Becherini, Y.
Doroshenko, V.
Kosack, K.
Ricarte, H. Rueda
Spencer, S.
Holch, T. L.
Takahashi, T.
Berge, D.
Wagner, S. J.
Marchegiani, P.
Marx, R.
Ashkar, H.
Peron, G.
Prokoph, H.
Parsons, R. D.
Punch, M.
Tsirou, M.
Horns, D.
Uchiyama, Y.
Cangemi, F.
Zacharias, M.
Djannati-Ataï, A.
Niemiec, J.
Mitchell, A.
Panter, M.
Salzmann, H.
Kasai, E.
Wierzcholska, Alicja
Olivera-Nieto, L.
Rudak, B.
Abdalla, H.
Stawarz, Łukasz
Grondin, M. -H.
Glawion, D.
Hofmann, W.
Panny, S.
Brun, F.
Cotter, G.
Marandon, V.
Mackey, J.
Luashvili, A.
Tanaka, T.
Wong, Yu Wun
Katarzyński, K.
Zouari, S.
Dmytriiev, A.
Shapopi, J. N. S.
Aharonian, F.
van Eldik, C.
Glicenstein, J. F.
Terrier, R.
Muller, J.
Bolmont, J.
Sasaki, M.
Stegmann, C.
Maurin, G.
Reimer, O.
Wilhelmi, E. de Ona
Steppa, C.
Reichherzer, P.
Martins, V. Barbosa
Sahakian, V.
Rowell, G.
Hinton, J. A.
Ostrowski, Michał
Zhu, S. J.
Pühlhofer, G.
Quirrenbach, A.
Backes, M.
Schüssler, F.
Schutte, H. M.
Zdziarski, A. A.
Tluczykont, M.
Jankowsky, F.
Vink, J.
Caroff, S.
Martí-Devesa, G.
Mbarubucyeye, J. Damascene
Sol, H.
Rieger, F.
Poireau, V.
Benkhali, F. Ait
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Very-high-energy γ-ray emission from young massive star clusters in the Large Magellanic Cloud
Autorzy:
Schutte, H. M.
Rowell, G.
Montanari, A.
Marx, R.
Kundu, A.
Glicenstein, J. F.
Żywucka, N.
Jamrozy, Marek
Pühlhofer, G.
Martins, V. Barbosa
Benkhali, F. Ait
Ostrowski, Michał
Brown, A.
Böttcher, M.
Le Stum, S.
Leuschner, F.
Chibueze, O.
Ren, H.
Sushch, I.
Aschersleben, J.
White, R.
de Bony de Lavergne, M.
Mackey, J.
Kluźniak, W.
Renaud, M.
Mitchell, A.
Reimer, A.
Reville, B.
Vecchi, M.
de Naurois, M.
Lenain, J.-P.
Cristofari, P.
Ravikularaman, S.
Chandra, S.
Reimer, O.
Funk, S.
Horns, D.
Filipovic, M.
Sahakian, V.
Lang, R. G.
Egberts, K.
Casanova, S.
Moghadam, M. O.
Brose, R.
Hofmann, W.
Lemoine-Goumard, M.
Feijen, K.
Tsirou, M.
Schüssler, F.
Batzofin, R.
Ruiz-Velasco, E.
Mehta, A.
Borowska, J.
Wagner, S. J.
Bernlöhr, K.
Kosack, K.
Rudak, B.
Santangelo, A.
Spencer, S.
Zdziarski, A. A.
Jankowsky, F.
Bruno, B.
Cotter, G.
Khatoon, R.
Celic, J.
Jung-Richardt, I.
Katarzyński, K.
Brun, F.
Einecke, S.
Dmytriiev, A.
Devin, J.
Panny, S.
Chibueze, J.
Steppa, C.
Hinton, J. A.
Rieger, F.
Ashkar, H.
Heß, B.
Cerruti, M.
Lemière, A.
Sasaki, M.
Chand, T.
Stawarz, Łukasz
Niemiec, J.
Bolmont, J.
de Ona Wilhelmi, E.
Backes, M.
Berge, D.
Venter, C.
Pensec, U.
Aharonian, F.
Terrier, R.
Tsuji, N.
Khélifi, B.
Moderski, R.
Taylor, A. M.
Chen, A.
Becherini, Y.
Regeard, M.
Haerer, L.
Huang, Zhiqiu
Zacharias, M.
Marandon, V.
Peron, G.
Burger-Scheidlin, C.
Holch, T. L.
Sabri, K.
Gabici, S.
Vink, J.
Kostunin, D.
Djuvsland, J.
Grolleron, G.
Wierzcholska, A.
Djannati-Ataï, A.
Moulin, E.
Steinmassl, S.
van Eldik, C.
Martí-Devesa, G.
Ohm, S.
Olivera-Nieto, L.
Kasai, E.
Streil, K.
Zech, A.
Gallant, Y. A.
Komin, Nu.
Salzmann, H.
Schäfer, J.
Fontaine, G.
Mohrmann, L.
Quirrenbach, A.
Glombitza, J.
Sol, H.
Opis:
The Tarantula Nebula in the Large Magellanic Cloud is known for its high star formation activity. At its center lies the young massive star cluster R136, providing a significant amount of the energy that makes the nebula shine so brightly at many wavelengths. Recently, young massive star clusters have been suggested to also efficiently produce very high-energy cosmic rays, potentially beyond PeV energies. Here, we report the detection of very-high-energy γ-ray emission from the direction of R136 with the High Energy Stereoscopic System, achieved through a multicomponent, likelihood-based modeling of the data. This supports the hypothesis that R136 is indeed a very powerful cosmic-ray accelerator. Moreover, from the same analysis, we provide an updated measurement of the γ-ray emission from 30 Dor C, the only superbubble detected at TeV energies presently. The γ-ray luminosity above 0.5 TeV of both sources is (2–3) × 10$^{35}$ erg s$^{−1}$. This exceeds by more than a factor of 2 the luminosity of HESS J1646−458, which is associated with the most massive young star cluster in the Milky Way, Westerlund 1. Furthermore, the γ-ray emission from each source is extended with a significance of >3σ and a Gaussian width of about 30 pc. For 30 Dor C, a connection between the γ-ray emission and the nonthermal X-ray emission appears likely. Different interpretations of the γ-ray signal from R136 are discussed.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Detection of very high-energy gamma-ray emission from Eta Carinae during its 2020 periastron passage
Autorzy:
Schüssler, F.
Holch, T. L.
Batzofin, R.
Mehta, A.
Holler, M.
Niemiec, J.
Fontaine, G.
Ruiz-Velasco, E.
Santangelo, A.
Lenain, J.-P.
Aharonian, F.
Kostunin, D.
Lang, R. G.
de Ona Wilhelmi, E.
Ren, H.
Streil, K.
Regeard, M.
Ohm, S.
Marcowith, A.
Khatoon, R.
Wierzcholska, Alicja
Sasaki, M.
Spencer, S.
Steppa, C.
Schäfer, J.
Barbosa Martins, V.
Ait Benkhali, F.
Brose, R.
Reimer, O.
Boisson, C.
Casanova, S.
Moghadam, M. O.
Werner, F.
Wach, T.
Bradascio, F.
Katarzyński, K.
Collins, T.
Mohrmann, L.
Venter, C.
Chibueze, O.
Kluźniak, W.
Bernlöhr, K.
Huang, Z.
Böttcher, M.
Brun, F.
Panny, S.
Tluczykont, M.
Cerruti, M.
Marandon, V.
van Eldik, C.
Schutte, H. M.
Sabri, K.
Stawarz, Łukasz
Hinton, J. A.
Salzmann, H.
Martí-Devesa, G.
Rudak, B.
Bolmont, J.
Reimer, A.
Escañuela Nieves, C.
de Naurois, M.
Moulin, E.
Kosack, K.
Żywucka-Hejzner, Natalia
Wagner, S. J.
Feijen, K.
Chand, T.
Mitchell, A.
Gabici, S.
Funk, S.
Ravikularaman, S.
Grondin, M.-H.
Chen, A.
Steinmassl, S.
Olivera-Nieto, L.
Tsirou, M.
Dmytriiev, A.
Heß, B.
Chandra, S.
Ernenwein, J.-P.
Ostrowski, Michał
Jardin-Blicq, A.
Djannati-Ataï, A.
Khélifi, B.
Le Stum, S.
Jamrozy, Marek
Shapopi, J. N. S.
Cotter, G.
Mackey, J.
Moderski, R.
Remy, Q.
Einecke, S.
Becherini, Y.
Quirrenbach, A.
Aschersleben, J.
Tanaka, T.
White, R.
Rowell, G.
Damascene Mbarubucyeye, J.
Jung-Richardt, I.
Chibueze, J.
Bruno, B.
Lemoine-Goumard, M.
Haerer, L.
Pensec, U.
Djuvsland, J.
Vecchi, M.
Filipovic, M.
Horns, D.
Malyshev, D.
Grolleron, G.
Marx, R.
Glicenstein, J. F.
Rieger, F.
Berge, D.
Lemière, A.
Terrier, R.
de Assis Scarpin, J.
Parsons, R. D.
Pühlhofer, G.
Celic, J.
Brown, A.
Ashkar, H.
de Bony de Lavergne, M.
Hofmann, W.
Luashvili, A.
Tsuji, N.
Egberts, K.
Panter, M.
Jankowsky, F.
Burger-Scheidlin, C.
Devin, J.
Sahakian, V.
Zdziarski, A. A.
Reville, B.
Zech, A.
Steenkamp, R.
Zacharias, M.
Komin, Nu.
Opis:
The colliding-wind binary system η Carinae has been identified as a source of high-energy (HE, below ∼100 GeV) and very high-energy (VHE, above ∼100 GeV) gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, the periastron passage, during which the stars are separated by only 1–2 au, is an intriguing time interval to probe particle acceleration processes within the system. In this work, we report on an extensive VHE observation campaign that for the first time covers the full periastron passage carried out with the High Energy Stereoscopic System (H.E.S.S.) in its 5-telescope configuration with upgraded cameras. The VHE gamma-ray emission from η Carinae was detected during the periastron passage with a steep spectrum with the spectral index Γ = 3.3 ± 0.2stat ± 0.1syst. Together with previous and follow-up observations, we derive a long-term light curve sampling one full orbit, showing hints of an increase in the VHE flux towards periastron, but no hint of variability during the passage itself. An analysis of contemporaneous Fermi-LAT data shows that the VHE spectrum represents a smooth continuation of the HE spectrum. From modelling the combined spectrum, we conclude that the gamma-ray emission region is located at distances of ∼10–20 au from the centre of mass of the system and that protons are accelerated up to energies of at least several tera-electronvolts inside the system in this phase.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Discovery of very high energy gamma-ray emission coincident with molecular clouds in the W 28 (G6.4-0.1) field
Autorzy:
Funk, S.
Orford, K. J.
Renaud, M.
Brown, A. M.
Feinstein, F.
Vincent, P.
Pelletier, G.
Schwemmer, S.
Chadwick, P. M.
Komin, Nu.
Bulik, T.
Ripken, J.
Marcowith, A.
Braun, I.
Dyks, J.
Gallant, Y. A.
Hauser, M.
Egberts, K.
Espigat, P.
Tavernet, J.-P.
de Jager, O. C.
Fontaine, G.
Steenkamp, R.
Volpe, F.
Nedbal, D.
Venter, C.
Moriguchi, Y.
Lamanna, G.
Lenain, J.-P.
Bühler, R.
Lemoine-Goumard, M.
Moulin, E.
de Naurois, M.
Rolland, L.
Lohse, T.
Henri, G.
Boutelier, T.
Saugé, L.
Drury, L. O'C.
Fukui, Y.
Kerschhaggl, M.
Degrange, B.
Rob, L.
Tam, P. H.
Khélifi, B.
Akhperjanian, A. G.
Bazer-Bachi, A. R.
Moderski, R.
Schwanke, U.
Völk, H. J.
Santangelo, A.
Fiasson, A.
Ranchon, S.
Hermann, G.
Dickinson, H. J.
Vasileiadis, G.
Bernlöhr, K.
Olive, J.-P.
Funk, Seb.
Schlickeiser, R.
Domainko, W.
Nolan, S. J.
Vialle, J. P.
Pedaletti, G.
Ruppel, J.
Cornils, R.
Schlenker, S.
Giebels, B.
Goret, P.
Coignet, G.
Büsching, I.
Kosack, K.
Martin, J. M.
Berge, D.
Le Gallou, R.
Wagner, S. J.
McComb, T. J. L.
Emmanoulopoulos, D.
Rayner, S. M.
Pita, S.
Punch, M.
Horns, D.
Boisson, C.
Behera, B.
Benbow, W.
Masterson, C.
Schwarzburg, S.
Glück, B.
Djannati-Ataï, A.
Panter, M.
Rudak, B.
Stawarz, Łukasz
Osborne, J. L.
Chounet, L.-M.
Ward, M.
Rosier-Lees, S.
Hauser, D.
Hofmann, W.
Füßling, M.
Hadjichristidis, C.
Clapson, A. C.
Superina, G.
Hoffmann, A.
Schröder, R.
Heinzelmann, G.
van Eldik, C.
Petrucci, P.-O.
Aharonian, F.
Vivier, M.
Glicenstein, J. F.
Terrier, R.
Stegmann, C.
Maurin, G.
Kendziorra, E.
Reimer, O.
Lemière, A.
Sahakian, V.
Carrigan, S.
Rowell, G.
Latham, I. J.
Hinton, J. A.
Farnier, C.
Ostrowski, Michał
Spangler, D.
Borrel, V.
Pühlhofer, G.
Holleran, M.
Raubenheimer, B. C.
Shalchi, A.
Costamante, L.
Förster, A.
Takeuchi, T.
Bolz, O.
Beilicke, M.
Brion, E.
Martineau-Huynh, O.
Sol, H.
Jacholkowska, A.
Dubus, G.
Hoppe, S.
Raue, M.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Unveiling extended gamma-ray emission around HESS J1813-178
Autorzy:
Holler, M.
Funk, S.
Renaud, M.
Cecil, R.
Reville, B.
Barnard, J.
Zargaryan, D.
Komin, Nu.
Bulik, T.
Cerruti, M.
Gallant, Y. A.
Noel, Angel
Reimer, A.
Fontaine, G.
Chen, A.
Steenkamp, R.
Mehta, A.
Gabici, S.
Kluźniak, W.
Kostunin, D.
Montanari, A.
Żywucka, N.
Venter, C.
Bi, B.
Lenain, J.-P.
Lemoine-Goumard, M.
Moulin, E.
de Naurois, M.
Leuschner, F.
Wach, T.
Aschersleben, J.
Sushch, I.
Malyshev, D.
Veh, J.
Steinmassl, S.
Suzuki, H.
Goswami, P.
Böttcher, M.
Chand, T.
Giavitto, G.
Einecke, S.
de Ona Wilhelmi, E.
Joshi, V.
Barbosa Martins, V.
Khélifi, B.
Wierzcholska, A.
Ghafourizadeh, S.
Batzofin, R.
Damascene Mbarubucyeye, J.
Moderski, R.
O’Brien, P.
Brose, R.
Bouyahiaoui, M.
Baktash, A.
Jamrozy, Marek
Murach, T.
Specovius, A.
Tsuji, N.
Ohm, S.
Bernlöhr, K.
Becherini, Y.
Leitl, F.
Regeard, M.
Doroshenko, V.
Chibueze, O.
Le Stum, S.
Kosack, K.
Spencer, S.
Holch, T. L.
Takahashi, T.
Berge, D.
Wagner, S. J.
Ren, H.
Marx, R.
Borowska, J.
Ashkar, H.
Parsons, R. D.
Punch, M.
Boisson, C.
Kundu, A.
Roellinghoff, G.
Zacharias, M.
Djannati-Ataï, A.
Niemiec, J.
Mitchell, A.
Panter, M.
Salzmann, H.
Olivera-Nieto, L.
Rudak, B.
Glawion, D.
Hofmann, W.
Marinos, P.
Panny, S.
Füßling, M.
Brun, F.
Cotter, G.
Filipovic, M.
Marandon, V.
Chambery, P.
Breuhaus, M.
Mackey, J.
de Bony de Lavergne, M.
Tanaka, T.
Katarzyński, K.
Zouari, S.
Dmytriiev, A.
Shapopi, J. N. S.
Aharonian, F.
van Eldik, C.
Chibueze, J.
Burger-Scheidlin, C.
Glicenstein, J. F.
Terrier, R.
Feijen, K.
Bolmont, J.
Sasaki, M.
Lang, R. G.
Reimer, O.
Steppa, C.
Lemière, A.
Unbehaun, T.
Reichherzer, P.
Bruno, B.
Ait Benkhali, F.
Sahakian, V.
Ernenwein, J.-P.
Hinton, J. A.
Grondin, M.-H.
Ostrowski, Michał
Vecchi, M.
Casanova, S.
Jung-Richardt, I.
Pühlhofer, G.
Quirrenbach, A.
Prokhorov, D. A.
Backes, M.
Schüssler, F.
Schutte, H. M.
Zdziarski, A. A.
Tluczykont, M.
Grolleron, G.
Jankowsky, F.
Celic, J.
Vink, J.
Klepser, S.
Caroff, S.
Martí-Devesa, G.
Rieger, F.
Mohrmann, L.
Khatoon, R.
Opis:
Context. HESS J1813–178 is a very-high-energy γ-ray source spatially coincident with the young and energetic pulsar PSR J1813–1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy emission in the vicinity of the pulsar has been revealed in the Fermi Large Area Telescope (LAT) data. This motivates revisiting the HESS J1813–178 region, taking advantage of improved analysis methods and an extended dataset. Aims. Using data taken by the High Energy Stereoscopic System (H.E.S.S.) experiment and the Fermi-LAT, we aim to describe the γ-ray emission in the region with a consistent model, to provide insights into its origin. Methods. We performed a likelihood-based analysis on 32 hours of H.E.S.S. data and 12 yr of Fermi-LAT data and we fitted a spectro-morphological model to the combined datasets. These results allowed us to develop a physical model for the origin of the observed γ-ray emission in the region. Results. In addition to the compact very-high-energy γ-ray emission centred on the pulsar, we find a significant yet previously undetected component along the Galactic plane. With Fermi-LAT data, we confirm extended high-energy emission consistent with the position and elongation of the extended emission observed with H.E.S.S. These results establish a consistent description of the emission in the region from GeV energies to several tens of TeV. Conclusions. This study suggests that HESS J1813–178 is associated with a γ-ray PWN powered by PSR J1813–1749. A possible origin of the extended emission component is inverse Compton emission from electrons and positrons that have escaped the confines of the pulsar and form a halo around the PWN.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Discovery of very-high-energy $\gamma$-ray emission from the vicinity of PSR J1913+1011 with HESS
Autorzy:
Hermann, G.
Fontaine, G.
Lohse, T.
Moderski, R.
Ward, M.
Braun, I.
Rudak, B.
Superina, G.
Hauser, D.
Latham, I. J.
Shalchi, A.
Brown, A. M.
Farnier, C.
Egberts, K.
Rosier-Lees, S.
Maurin, G.
Boutelier, T.
Domainko, W.
Heinzelmann, G.
O'C. Drury, L.
Stegmann, C.
Clapson, A. C.
Bulik, T.
van Eldik, C.
Beilicke, M.
Panter, M.
Terrier, R.
Akhperjanian, A. G.
Pedaletti, G.
Ripken, J.
Kerschhaggl, M.
Venter, C.
Santangelo, A.
Funk, Seb.
Dickinson, H. J.
Pühlhofer, G.
Schöck, F.
Marcowith, A.
Steenkamp, R.
Hoppe, S.
Hofmann, W.
Horns, D.
Bazer-Bachi, A. R.
de Naurois, M.
Aharonian, F.
Büsching, I.
Boisson, C.
Schröder, R.
Hauser, M.
Dalton, M.
Martineau-Huynh, O.
Stawarz, Łukasz
Vivier, M.
Füßling, M.
Moulin, E.
Schwanke, U.
de Jager, O. C.
Zech, A.
Nolan, S. J.
Jacholkowska, A.
Lenain, J.-P.
Nedbal, D.
Ostrowski, Michał
Tavernet, J.-P.
de Oña Wilhelmi, E.
Katarzyński, K.
Rayner, S. M.
Behera, B.
Costamante, L.
Ohm, S.
Rolland, L.
Raubenheimer, B. C.
Spangler, D.
Holleran, M.
Kosack, K.
Volpe, F.
Bühler, R.
Gallant, Y. A.
Hoffmann, A.
Dyks, J.
Glicenstein, J. F.
Olive, J.-P.
Punch, M.
Renaud, M.
Henri, G.
Borrel, V.
Fiasson, A.
Feinstein, F.
Dubois, F.
Bolz, O.
Degrange, B.
Rowell, G.
Pita, S.
Rob, L.
Maurin, D.
Lemoine-Goumard, M.
Jung, I.
Ruppel, J.
McComb, T. J. L.
Wagner, S. J.
Keogh, D.
Brion, E.
Völk, H. J.
Espigat, P.
Sahakian, V.
Khélifi, B.
Raue, M.
Osborne, J. L.
Bernlöhr, K.
Goret, P.
Coignet, G.
Dubus, G.
Martin, J. M.
Schwarzburg, S.
Chounet, L.-M.
Kendziorra, E.
Lemière, A.
Schwemmer, S.
Cornils, R.
Petrucci, P.-O.
Zdziarski, A. A.
Carrigan, S.
Masterson, C.
Benbow, W.
Hadjichristidis, C.
Sol, H.
Djannati-Ataï, A.
Giebels, B.
Orford, K. J.
Vialle, J. P.
Chadwick, P. M.
Glück, B.
Vasileiadis, G.
Komin, Nu.
Lamanna, G.
Barres de Almeida, U.
Tam, P. H.
Schlickeiser, R.
Vincent, P.
Hinton, J. A.
Pelletier, G.
Reimer, O.
Förster, A.
Emmanoulopoulos, D.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The H.E.S.S. extragalactic sky survey with the first decade of observations
Autorzy:
Rowell, G.
Montanari, A.
Marx, R.
Kundu, A.
Glicenstein, J. F.
Goswami, P.
Sanchez, D. A.
Völk, H. J.
Jamrozy, Marek
Pühlhofer, G.
Suzuki, H.
Ostrowski, Michał
Brown, A.
Böttcher, M.
Le Stum, S.
Leuschner, F.
Chibueze, O.
Ren, H.
Aschersleben, J.
Bradascio, F.
de Bony de Lavergne, M.
Mackey, J.
Fegan, S.
Mitchell, A.
Reimer, A.
Reville, B.
Vecchi, M.
de Naurois, M.
Lenain, J.-P.
Cristofari, P.
Ravikularaman, S.
Chandra, S.
Reimer, O.
O’Brien, P.
Funk, S.
Bulik, T.
Horns, D.
Sahakian, V.
Lang, R. G.
Egberts, K.
Casanova, S.
Żywucka-Hejzner, Natalia
Holler, M.
Brose, R.
Hofmann, W.
Tanaka, T.
Ait Benkhali, F.
Lemoine-Goumard, M.
Tsirou, M.
Takahashi, T.
Schüssler, F.
Batzofin, R.
Ruiz-Velasco, E.
Mehta, A.
Sharma, A.
Borowska, J.
Wagner, S. J.
Bernlöhr, K.
Kosack, K.
Rudak, B.
Santangelo, A.
Spencer, S.
Zdziarski, A. A.
Boisson, C.
Jankowsky, F.
Shapopi, J. N. S.
Bruno, B.
Davids, I. D.
Luashvili, A.
Cotter, G.
Khatoon, R.
Celic, J.
Katarzyński, K.
Brun, F.
Einecke, S.
Dmytriiev, A.
Mbarubucyeye, J. D.
Devin, J.
Panny, S.
Chibueze, J.
Steppa, C.
Hinton, J. A.
Rieger, F.
Ashkar, H.
Heß, B.
Wierzcholska, Alicja
Cerruti, M.
Barbosa Martins, V.
Lemière, A.
Sasaki, M.
Chand, T.
Jardin-Blicq, A.
Stawarz, Łukasz
Niemiec, J.
Bolmont, J.
de Ona Wilhelmi, E.
Backes, M.
Berge, D.
Venter, C.
Pensec, U.
Aharonian, F.
Terrier, R.
Thakur, A.
Malyshev, D.
Khélifi, B.
Steenkamp, R.
Moderski, R.
Taylor, A. M.
Chen, A.
Becherini, Y.
Regeard, M.
Haerer, L.
Huang, Zhiqiu
Zacharias, M.
Marandon, V.
Bouyahiaoui, M.
Burger-Scheidlin, C.
Holch, T. L.
Gabici, S.
Vink, J.
Kostunin, D.
Djuvsland, J.
Grolleron, G.
Steinmassl, S.
van Eldik, C.
Martí-Devesa, G.
Olivera-Nieto, L.
Bylund, T.
Kasai, E.
Wach, T.
Zech, A.
Komin, Nu.
Salzmann, H.
Reis, I.
Schäfer, J.
Punch, M.
Fontaine, G.
Mohrmann, L.
Quirrenbach, A.
Glombitza, J.
Sol, H.
Panter, M.
Opis:
The results of the first extragalactic gamma-ray survey by the High Energy Stereoscopic System (H.E.S.S.) are presented. The survey comprises 2720 hours of very high-energy gamma-ray observations of the extragalactic sky, recorded with H.E.S.S. from 2004 up to the end of 2012. These data have been re-analysed using a common consistent set of up-to-date data calibration and analysis tools. From this analysis, a list of 23 detected objects, predominantly blazars, was obtained. This catalogue was assessed in terms of the source class populations that it contains. The level of source parameter bias for the blazar sources, probed by this observational dataset, was evaluated using Monte-Carlo simulations. Spectral results obtained with the H.E.S.S. data were compared with the Fermi-LAT catalogues to present the full gamma-ray picture of the detected objects. Lastly, this unique dataset was used to assess the contribution of BL Lacertae objects and flat-spectrum radio quasars to the extragalactic gamma-ray background light at several hundreds of gigaelectronvolts. These results are accompanied by the release of the high-level data to the astrophysical community.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
HESS very-high-energy gamma-ray sources without identified counterparts
Autorzy:
Ward, M.
Rowell, G.
Akhperjanian, A. G.
Glicenstein, J. F.
Völk, H. J.
Martin, J. M.
Schröder, R.
Petrucci, P.-O.
Pühlhofer, G.
de Jager, O. C.
Raue, M.
Pita, S.
Vasileiadis, G.
Bolz, O.
Ostrowski, Michał
Coignet, G.
Renaud, M.
Barres de Almeida, U.
Pelletier, G.
Kerschhaggl, M.
Kendziorra, E.
Raubenheimer, B. C.
de Naurois, M.
Keogh, D.
Schöck, F.
Lenain, J.-P.
Martineau-Huynh, O.
Dyks, J.
Shalchi, A.
Jung, I.
Osborne, J. L.
Dalton, M.
Hadjichristidis, C.
Funk, S.
Costamante, L.
Bulik, T.
Spangler, D.
Vialle, J. P.
Horns, D.
Sahakian, V.
Egberts, K.
Hofmann, W.
Lamanna, G.
Lemoine-Goumard, M.
Schwemmer, S.
Farnier, C.
Dubois, F.
Glück, B.
Schlickeiser, R.
Vincent, P.
Degrange, B.
Wagner, S. J.
Bernlöhr, K.
Tam, P. H.
Kosack, K.
Rudak, B.
Santangelo, A.
Büsching, I.
Zdziarski, A. A.
Boisson, C.
Behera, B.
Cornils, R.
Rosier-Lees, S.
Bazer-Bachi, A. R.
Bühler, R.
Katarzyński, K.
Ripken, J.
Domainko, W.
Hoffmann, A.
Hinton, J. A.
Feinstein, F.
Lemière, A.
Braun, I.
Boutelier, T.
Masterson, C.
Vivier, M.
Stawarz, Łukasz
Carrigan, S.
Ranchon, S.
Lohse, T.
Dickinson, H. J.
O'C. Drury, L.
Hauser, M.
Venter, C.
Henri, G.
Nedbal, D.
Ruppel, J.
Aharonian, F.
Chounet, L.-M.
Terrier, R.
Rolland, L.
Khélifi, B.
Goret, P.
Moderski, R.
Pedaletti, G.
Steenkamp, R.
Nolan, S. J.
Emmanoulopoulos, D.
Clapson, A. C.
Stegmann, C.
Fiasson, A.
Brown, A. M.
Hauser, D.
Volpe, F.
Giebels, B.
Heinzelmann, G.
Marcowith, A.
Olive, J.-P.
Djannati-Ataï, A.
Moulin, E.
Förster, A.
Espigat, P.
McComb, T. J. L.
van Eldik, C.
Orford, K. J.
Schwanke, U.
Ohm, S.
Zech, A.
Borrel, V.
Dubus, G.
Beilicke, M.
Gallant, Y. A.
Komin, Nu.
Rob, L.
Latham, I. J.
Benbow, W.
Chadwick, P. M.
Punch, M.
Brion, E.
Füßling, M.
Maurin, G.
Rayner, S. M.
Holleran, M.
Fontaine, G.
Jacholkowska, A.
de Oña Wilhelmi, E.
Superina, G.
Hermann, G.
Tavernet, J.-P.
Maurin, D.
Sol, H.
Hoppe, S.
Schwarzburg, S.
Panter, M.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 204

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