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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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Tytuł:
Microstructure and Mechanical Properties of Duplex Structured Mg-Li-Zn-Y Alloys
Autorzy:
Su, J.
Yang, Y.
Fu, X.
Ma, Q.
Ren, F.
Peng, X.
Tematy:
alloy Mg-Li-Zn-Y
microstructure
mechanical properties
extruded
stop Mg-Li-Zn-Y
mikrostruktura
właściwości mechaniczne
wytłaczanie
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/381787.pdf  Link otwiera się w nowym oknie
Opis:
As-cast Mg-6Li-0.3Zn-0.6Y and Mg-6Li-1.2Zn-1.2Y (wt%) alloys were prepared and extruded at 260 ºC with an extrusion ratio of 25. The microstructure and mechanical behavior of as-cast and extruded alloys are reported and discussed. The results show that Mg-6Li-1.2Zn- 1.2Y alloy is composed of α-Mg, β-Li, and W-Mg3Zn3Y2 phases while Mg-6Li-0.3Zn-0.6Y alloy contains α-Mg, β-Li, W-Mg3Zn3Y2 phase and X-Mg12ZnY. After hot extrusion, the microstructure of specimens is refined and the average grains size of extruded alloys is 15 μm. Dynamic recrystallization occurs during the extrusion, leading to grain refinement of test alloys. Both the strength and elongation of test alloys are improved by extrusion. The extruded Mg-6Li-0.3Zn-0.6Y alloy possesses an ultimate strength of 225 MPa with an elongation of 18% while the strength and elongation of Mg-6Li-1.2Zn-1.2Y alloy are 206 MPa and 28%, respectively. The X-phase in Mg-6Li-0.3Zn- 0.6Y is beneficial to the improvement of strength, but will lead to the decrease of ductility.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Middle Jurassic tangle-veined flies from Inner Mongolia, China
Autorzy:
Zhang, K
Yang, D.
Ren, D.
Ge, F.
Tematy:
Middle Jurassic
nemestrinid fly
morphology
Nemestrinidae
tangle veined fly
fossil
paleontology
China
Jurassic
Ahirmoneura neimengguensis
Inner Mongolia
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/20019.pdf  Link otwiera się w nowym oknie
Opis:
Many Jurassic fossil nemestrinid flies have been found in the Palaearctic region. China is an important locality for fossil nemestrinid flies. Up to now, 2 genera with 3 species have been discovered in China. In the present paper, a third genus and species, Ahirmoneura neimengguensis Zhang, Yang, and Ren, gen. et sp. nov., from the Middle Jurassic Daohugou Formation of China is described. A key to genera of fossil nemestrinid flies from China is given.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of irregular waves in a numerical wave tank
Autorzy:
Li, Z-F.
Shi, Y. Y.
Ren, H. L.
Li, H.
Ashraf, M. A.
Tematy:
open boundary condition
multi transmitting formula
irregular waves
boundary element method
numerical wave tank
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/260392.pdf  Link otwiera się w nowym oknie
Opis:
The time domain boundary element method was utilized to simulate the propagation of the irregular waves in a numerical wave tank. The problem was solved in a time-marching scheme, upon the irregular waves being fed through the inflow boundary, in which the theoretical solution was obtained from the wave energy spectrum. The open boundary condition was modeled by the multi transmitting formula (MTF), in which the phase velocity was calculated according to the Sommerfeld’s condition. The velocity potential and wave elevation were directly obtained by integrating the free surface condition twice, with respect to time. The accuracy of the developed numerical scheme was verified by simulating the propagation of irregular waves. The numerical results show good agreements with the analytical solutions, which prove that the proposed scheme is a promising way to the simulation of wave-body interactions.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TeV flaring activity of the AGN PKS 0625–354 in November 2018
Autorzy:
Schüssler, F.
Holch, T. L.
Batzofin, R.
Mehta, A.
Holler, M.
Niemiec, J.
Barnard, J.
Fontaine, G.
Wierzcholska, A.
Lenain, J.-P.
Aharonian, F.
Kostunin, D.
Lang, R. G.
de Ona Wilhelmi, E.
Ren, H.
Streil, K.
Giavitto, G.
Caroff, S.
Ohm, S.
Glawion, D.
O’Brien, P.
Khatoon, R.
Kasai, E.
Sanchez, D. A.
Takahashi, T.
Sasaki, M.
Leitl, F.
Spencer, S.
Barbosa Martins, V.
Ait Benkhali, F.
Punch, M.
Brose, R.
Reimer, O.
Boisson, C.
Casanova, S.
Bradascio, F.
Katarzyński, K.
Venter, C.
Chibueze, O.
Kluźniak, W.
Bernlöhr, K.
Bulik, T.
Böttcher, M.
Brun, F.
Panny, S.
Cerruti, M.
Veh, J.
van Eldik, C.
Borowska, J.
Schutte, H. M.
Stawarz, Łukasz
Hinton, J. A.
Salzmann, H.
Bylund, T.
Rudak, B.
Bolmont, J.
Reimer, A.
Joshi, V.
Bi, B.
de Naurois, M.
Suzuki, H.
Moulin, E.
Kosack, K.
Wagner, S. J.
Zargaryan, D.
Chand, T.
Mitchell, A.
Gabici, S.
Funk, S.
Chen, A.
Baktash, A.
Steinmassl, S.
Olivera-Nieto, L.
Breuhaus, M.
Dmytriiev, A.
Chandra, S.
Davids, I. D.
Ernenwein, J.-P.
Ostrowski, Michał
Doroshenko, V.
Khélifi, B.
Le Stum, S.
Jamrozy, Marek
Shapopi, J. N. S.
Cotter, G.
Mackey, J.
Moderski, R.
Leuschner, F.
Ghafourizadeh, S.
Einecke, S.
Becherini, Y.
Quirrenbach, A.
Cecil, R.
Aschersleben, J.
Specovius, A.
Tanaka, T.
Damascene Mbarubucyeye, J.
Meyer, M.
Jung-Richardt, I.
Chibueze, J.
Bruno, B.
Haerer, L.
Backes, M.
Prokhorov, D. A.
Djuvsland, J.
Vecchi, M.
Żywucka, N.
Horns, D.
Grolleron, G.
Marx, R.
Glicenstein, J. F.
Reichherzer, P.
Zouari, S.
Goswami, P.
Rieger, F.
Berge, D.
Lemière, A.
Parsons, R. D.
Pühlhofer, G.
Celic, J.
Brown, A.
Ashkar, H.
de Bony de Lavergne, M.
Luashvili, A.
Egberts, K.
Sol, H.
Montanari, A.
Sushch, I.
Jankowsky, F.
Burger-Scheidlin, C.
Glombitza, J.
Füßling, M.
Pita, S.
Sahakian, V.
Zdziarski, A. A.
Zech, A.
Steenkamp, R.
Zacharias, M.
Komin, Nu.
Opis:
Most γ-ray detected active galactic nuclei are blazars with one of their relativistic jets pointing towards the Earth. Only a few objects belong to the class of radio galaxies or misaligned blazars. Here, we investigate the nature of the object PKS 0625−354, its γ-ray flux and spectral variability and its broad-band spectral emission with observations from H.E.S.S., Fermi-LAT, Swift-XRT, and UVOT taken in November 2018. The H.E.S.S. light curve above 200 GeV shows an outburst in the first night of observations followed by a declining flux with a halving time scale of 5.9 h. The γγ-opacity constrains the upper limit of the angle between the jet and the line of sight to ∼10°. The broad-band spectral energy distribution shows two humps and can be well fitted with a single-zone synchrotron self Compton emission model. We conclude that PKS 0625−354, as an object showing clear features of both blazars and radio galaxies, can be classified as an intermediate active galactic nuclei. Multi-wavelength studies of such intermediate objects exhibiting features of both blazars and radio galaxies are sparse but crucial for the understanding of the broad-band emission of γ-ray detected active galactic nuclei in general.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Autorzy:
Kurepa, Dalibor
Guo, Guo
Ma, Hai-Ran
Zong, Hai-Feng
Yeh, Tsu F.
Hsieh, Kai-Sheng
Cao, Hai-Ying
Liu, Jing
Jagła, Mateusz
Ren, Xiao-Ling
Zhou, Xiao-Guang
Feletti, Francesco
Lodha, Abhay
Lovrenski, Jovan
Shang, Li-Li
Hu, Cai-Bao
Rodriguez-Fanjul, Javier
Volpicelli, Giovanni
Alonso-Ojembarrena, Almudena
Fu, Wei
Guo, Rui-Jun
Li, Ying
Copetti, Roberto
Shah, Heli
Wan, Yan
Shan, Rui-Yan
Yan, Wei
Qiu, Ru-Xin
Sorantin, Erich
Opis:
Lung ultrasound (LUS) is now widely used in the diagnosis and monitor of neonatal lung diseases. Nevertheless, in the published literatures, the LUS images may display a significant variation in technical execution, while scanning parameters may influence diagnostic accuracy. The inter- and intra-observer reliabilities of ultrasound exam have been extensively studied in general and in LUS. As expected, the reliability declines in the hands of novices when they perform the point-of-care ultrasound (POC US). Consequently, having appropriate guidelines regarding to technical aspects of neonatal LUS exam is very important especially because diagnosis is mainly based on interpretation of artifacts produced by the pleural line and the lungs. The present work aimed to create an instrument operation specification and parameter setting guidelines for neonatal LUS. Technical aspects and scanning parameter settings that allow for standardization in obtaining LUS images include (1) select a high-end equipment with high-frequency linear array transducer (12–14 MHz). (2) Choose preset suitable for lung examination or small organs. (3) Keep the probe perpendicular to the ribs or parallel to the intercostal space. (4) Set the scanning depth at 4–5 cm. (5) Set 1–2 focal zones and adjust them close to the pleural line. (6) Use fundamental frequency with speckle reduction 2–3 or similar techniques. (7) Turn off spatial compounding imaging. (8) Adjust the time-gain compensation to get uniform image from the near-to far-field.
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:
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:
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:
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:
High-statistics measurement of the cosmic-ray electron spectrum with H.E.S.S.
Autorzy:
Holler, M.
Funk, S.
Reville, B.
Collins, T.
Komin, Nu.
Bulik, T.
Ruiz-Velasco, E.
Taylor, A. M.
Cerruti, M.
de Lavergne, M. de Bony
Pensec, U.
Reimer, A.
Egberts, K.
Fontaine, G.
Chen, A.
Gabici, S.
Kluźniak, W.
Kostunin, D.
Montanari, A.
Żywucka, N.
Venter, C.
Moghadam, M. O.
Bi, B.
Kerszberg, D.
Lenain, J.-P.
Gallant, Y. A.
Lemoine-Goumard, M.
Moulin, E.
de Naurois, M.
Leuschner, F.
Wach, T.
Aschersleben, J.
Malyshev, D.
Zech, A.
Schäfer, J.
Glombitza, J.
Steinmassl, S.
Suzuki, H.
Böttcher, M.
Chand, T.
Einecke, S.
Joshi, V.
Khélifi, B.
Wierzcholska, A.
Batzofin, R.
Meyer, M.
Moderski, R.
Sharma, A.
Santangelo, A.
Schutte, H. M.
Brose, R.
Bouyahiaoui, M.
Jamrozy, Marek
Devin, J.
Ohm, S.
Bernlöhr, K.
Ravikularaman, S.
Huang, Zhiqiu
Becherini, Y.
Shapopi, J. N. S.
Heß, B.
Leitl, F.
Regeard, M.
Chibueze, O.
Chandra, S.
Le Stum, S.
Reis, I.
Kosack, K.
Spencer, S.
Takahashi, T.
Bylund, T.
Berge, D.
Ren, H.
Lang, R. G.
Marx, R.
Borowska, J.
Parsons, D.
Ashkar, H.
Peron, G.
Tsirou, M.
Punch, M.
Horns, D.
Boisson, C.
Kundu, A.
Wagner, S. J.
Zacharias, M.
Niemiec, J.
Mitchell, A.
Panter, M.
Salzmann, H.
Kasai, E.
Olivera-Nieto, L.
Fegan, S.
Rudak, B.
Stawarz, Łukasz
Hofmann, W.
Marinos, P.
Panny, S.
Brun, F.
Cotter, G.
Marandon, V.
Mackey, J.
Luashvili, A.
Tanaka, T.
Brown, A.
Katarzyński, K.
Dmytriiev, A.
Holch, T. L.
Aharonian, F.
van Eldik, C.
Chibueze, J.
Burger-Scheidlin, C.
Terrier, R.
Feijen, K.
Bolmont, J.
Glicenstein, J. F.
Sasaki, M.
Reimer, O.
Wilhelmi, E. de Ona
Steppa, C.
Lemière, A.
Martins, V. Barbosa
Bruno, B.
Sahakian, V.
Rowell, G.
Ernenwein, J.-P.
Ostrowski, Michał
Vecchi, M.
Casanova, S.
Jung-Richardt, I.
Pühlhofer, G.
Quirrenbach, A.
Backes, M.
Schüssler, F.
Grolleron, G.
Jankowsky, F.
Celic, J.
Vink, J.
Zdziarski, A. A.
Martí-Devesa, G.
Mbarubucyeye, J. Damascene
Sol, H.
Rieger, F.
Djuvsland, J.
Mohrmann, L.
Khatoon, R.
Benkhali, F. Ait
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 53

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