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Tytuł:
Identification and prospective stability of electronic nose (eNose)-derived inflammatory phenotypes in patients with severe asthma
Autorzy:
Lefaudeux, D.
Wang, Y.
Vink, T.J.
Dahlén, S.E.
Caruso, M.
De Meulder, B.
Fowler, S.J.
Brinkman, P.
Shaw, D.E.
Bansal, A.T.
Montuschi, P.
Chanez, P.
Sun, K.
Knobel, H.H.
Maitland-van der Zee, A.H.
Pennazza, G.
Djukanovic, R.
Horvath, I.
Hekking, P.P.
D'Amico, A.
Santonico, M.
Sousa, A.R.
Krug, N.
Geiser, T.
Wagener, A.H.
Weda, H.
Bakke, P.S.
Corfield, J.
Musiał, Jacek
Rattray, N.J.
Sandstrom, T.
Chung, K.F.
Sterk, P.J.
Auffray, C.
Riley, J.H.
Opis:
Background: Severe asthma is a heterogeneous condition, as shown by independent cluster analyses based on demographic, clinical, and inflammatory characteristics. A next step is to identify molecularly driven phenotypes using ‘‘omics’’ technologies. Molecular fingerprints of exhaled breath are associated with inflammation and can qualify as noninvasive assessment of severe asthma phenotypes. Objectives: We aimed (1) to identify severe asthma phenotypes using exhaled metabolomic fingerprints obtained from a composite of electronic noses (eNoses) and (2) to assess the stability of eNose-derived phenotypes in relation to withinpatient clinical and inflammatory changes. Methods: In this longitudinal multicenter study exhaled breath samples were taken from an unselected subset of adults with severe asthma from the U-BIOPRED cohort. Exhaled metabolites were analyzed centrally by using an assembly of eNoses. Unsupervised Ward clustering enhanced by similarity profile analysis together with K-means clustering was performed. For internal validation, partitioning around medoids and topological data analysis were applied. Samples at 12 to 18 months of prospective follow-up were used to assess longitudinal within-patient stability. Results: Data were available for 78 subjects (age, 55 years [interquartile range, 45-64 years]; 41% male). Three eNosedriven clusters (n 5 26/33/19) were revealed, showing differences in circulating eosinophil (P 5 .045) and neutrophil (P 5 .017) percentages and ratios of patients using oral corticosteroids (P 5 .035). Longitudinal within-patient cluster stability was associated with changes in sputum eosinophil percentages (P 5 .045). Conclusions: We have identified and followed up exhaled molecular phenotypes of severe asthma, which were associated with changing inflammatory profile and oral steroid use. This suggests that breath analysis can contribute to the management of severe asthma.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The LOFAR Two-metre Sky Survey : V. Second data release
Autorzy:
Retana-Montenegro, E.
Hajduk, M.
Cuciti, V.
Iacobelli, M.
Małek, K.
Magliocchetti, M.
Jamrozy, Marek
Bilicki, M.
Enßlin, T. A.
Mandal, S.
Zheng, J.
Mevius, M.
Brunetti, G.
Heesen, V.
Duncan, K.
Brienza, M.
Riseley, C. J.
van Weeren, R. J.
Di Gennaro, G.
Morganti, R.
Callingham, J. R.
Sweijen, F.
Massaro, F.
Asabere, B.
Mechev, A.
Mahatma, V.
Timmerman, R.
Rowlinson, A.
Vedantham, H.
Vaccari, M.
Oonk, J. B. R.
Gürkan, G.
Conway, J. E.
Prandoni, I.
Hugo, B.
Saxena, A.
Miley, G. K.
Nikiel-Wroczyński, Błażej
Danezi, A.
O'Sullivan, S. P.
Edler, H. W.
Nair, D. G.
West, J. L.
Hale, C. L.
White, G. J.
Kondapally, R.
Rajpurohit, K.
Schwarz, D. J.
Hoang, D. N.
Zhang, X.
Botteon, A.
Morabito, L. K.
Wołowska, A.
Bonnassieux, E.
Mingo, B.
Albert, J. G.
Best, P. N.
Orrú, E.
Bacon, D. J.
Kukreti, P.
Dallacasa, D.
Hardcastle, M. J.
Cassano, R.
Bonafede, A.
Röttgering, H. J. A.
Schrijvers, C.
Hoeft, M.
Dijkema, T. J.
Williams, W. L.
Jelić, V.
Alegre, L.
Calistro Rivera, G.
Grange, Y. G.
Horellou, C.
Siewert, T. M.
de Gasperin, F.
Mostert, R. I. J.
Emig, K. L.
Dettmar, R. J.
Rafferty, D.
Bonato, M.
Chyży, Krzysztof
Smith, D. J. B.
Franzen, T. M. O.
Nakoneczny, S. J.
van Piggelen, H. E.
Jackson, N.
Cochrane, R.
Vink, J.
Meyer-Zhao, Z.
Shulevski, A.
Tasse, C.
Haverkorn, M.
Kunert-Bajraszewska, M.
Smirnov, O.
García-Vergara, C.
Pajdosz-Śmierciak, Urszula
Brüggen, M.
Pasini, T.
Heald, G.
Sabater, J.
Drabent, A.
Offringa, A.
Croston, J. H.
Bester, L.
Shimwell, T. W.
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:
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:
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:
H.E.S.S. observations of the 2021 periastron passage of PSR B1259-63/LS 2883
Autorzy:
Holler, M.
Funk, S.
Komin, Nu.
Bulik, T.
Ruiz-Velasco, E.
Cerruti, M.
Gallant, Y. A.
Pensec, U.
Reimer, A.
Egberts, K.
Meintjes, P. J.
Fontaine, G.
Chen, A.
Steenkamp, R.
Mehta, A.
Gabici, S.
Kluźniak, W.
Kostunin, D.
Montanari, A.
Żywucka, N.
Khangulyan, D.
Venter, C.
Lenain, J.-P.
Lemoine-Goumard, M.
Moulin, E.
de Naurois, M.
Leuschner, F.
Wach, T.
Aschersleben, J.
Sushch, I.
Malyshev, D.
Zech, A.
Schäfer, J.
Steinmassl, S.
Goswami, P.
Böttcher, M.
Chand, T.
Einecke, S.
de Ona Wilhelmi, E.
Joshi, V.
Barbosa Martins, V.
Khélifi, B.
Wierzcholska, A.
Batzofin, R.
Damascene Mbarubucyeye, J.
Moderski, R.
Santangelo, A.
Brose, R.
Bouyahiaoui, M.
Jamrozy, Marek
Murach, T.
Devin, J.
Thorpe-Morgan, C.
Ohm, S.
Bernlöhr, K.
van Soelen, B.
Huang, Zhiqiu
Werner, F.
Becherini, Y.
Heß, B.
Leitl, F.
Regeard, M.
Chibueze, O.
Chandra, S.
Le Stum, S.
Reis, I.
Kosack, K.
Spencer, S.
Holch, T. L.
Takahashi, T.
Berge, D.
Wagner, S. J.
Ren, H.
Marx, R.
Borowska, J.
Ashkar, H.
Peron, G.
Parsons, R. D.
Punch, M.
Boisson, C.
Kundu, A.
Zacharias, M.
Niemiec, J.
Mitchell, A.
Panter, M.
Salzmann, H.
Kasai, E.
Rudak, B.
Stawarz, Łukasz
Glawion, D.
Hofmann, W.
Panny, S.
Brun, F.
Cotter, G.
Mackey, J.
de Bony de Lavergne, M.
Tanaka, T.
Brown, A.
Katarzyński, K.
Dmytriiev, A.
Shapopi, J. N. S.
Aharonian, F.
van Eldik, C.
Chibueze, J.
Burger-Scheidlin, C.
Glicenstein, J. F.
Terrier, R.
Bolmont, J.
Sasaki, M.
Lang, R. G.
Reimer, O.
Steppa, C.
Lemière, A.
Unbehaun, T.
Bruno, B.
Ait Benkhali, F.
Sahakian, V.
Streil, K.
Ernenwein, J.-P.
Ostrowski, Michał
Taylor, A. M.
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.
Caroff, S.
Martí-Devesa, G.
Rieger, F.
Haerer, L.
Djuvsland, J.
Mohrmann, L.
Khatoon, R.
Opis:
PSR B1259–63/LS 2883 is a gamma-ray binary system that hosts a pulsar in an eccentric orbit, with a 3.4 yr period, around an O9.5Ve star (LS 2883). At orbital phases close to periastron passages, the system radiates bright and variable non-thermal emission, for which the temporal and spectral properties of this emission are, for now, poorly understood. In this regard, very high-energy (VHE) emission is especially useful to study and constrain radiation processes and particle acceleration in the system. We report on an extensive VHE observation campaign conducted with the High Energy Stereoscopic System, comprised of approximately 100 h of data taken over five months, from t$_{p}$ − 24 days to t$_{p}$ + 127 days around the system’s 2021 periastron passage (where t$_{p}$ is the time of periastron). We also present the timing and spectral analyses of the source. The VHE light curve in 2021 is consistent overall with the stacked light curve of all previous observations. Within the light curve, we report a VHE maximum at times coincident with the third X-ray peak first detected in the 2021 X-ray light curve. In the light curve – although sparsely sampled in this time period – we see no VHE enhancement during the second disc crossing. In addition, we see no correspondence to the 2021 GeV flare in the VHE light curve. The VHE spectrum obtained from the analysis of the 2021 dataset is best described by a power law of spectral index Γ = 2.65 ± 0.04$_{stat}$ ± 0.04$_{sys}$, a value consistent with the spectral index obtained from the analysis of data collected with H.E.S.S. during the previous observations of the source. We report spectral variability with a difference of ΔΓ = 0.56 ± 0.18$_{stat}$ ± 0.10$_{sys}$ at 95% confidence intervals, between sub-periods of the 2021 dataset. We also detail our investigation into X-ray/TeV and GeV/TeV flux correlations in the 2021 periastron passage. We find a linear correlation between contemporaneous flux values of X-ray and TeV datasets, detected mainly after t$_{p}$ + 25 days, suggesting a change in the available energy for non-thermal radiation processes. We detect no significant correlation between GeV and TeV flux points, within the uncertainties of the measurements, from ∼t$_{p}$ − 23 days to ∼t$_{p}$ + 126 days. This suggests that the GeV and TeV emission originate from different electron populations.
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
Wyświetlanie 1-10 z 125

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