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Your search keyword '"T. Krähenbühl"' showing total 2 results
Start Over Author "T. Krähenbühl" Publisher elsevier science bv
2 results on '"T. Krähenbühl"'

1. Performance of the MAGIC stereo system obtained with Crab Nebula data

Author

J. M. Paredes, Antonio Stamerra, Aldo Treves, Daniel Nieto, V. Scalzotto, Daniela Dorner, Abelardo Moralejo, J. Storz, Thomas Bretz, S. N. Shore, Riccardo Paoletti, D. Häfner, R. Mirzoyan, S. Partini, Hanna Kellermann, D. Höhne-Mönch, Ignasi Reichardt, Masahiro Teshima, Petar Temnikov, W. Bednarek, Igor Oya, Fabrizio Tavecchio, Elisa Bernardini, Silvia Pardo, Pierre Colin, Ll. Font, M. Martı´nez, P. Antoranz, E. A. Alvarez, Konstancja Satalecka, A. Boller, Wolfgang Rhode, Elina Lindfors, K. Saito, L. Cossio, J. Moldón, M. Uellenbeck, Gianluca Giavitto, E. Colombo, Michele Doro, Kari Nilsson, Hiroko Miyamoto, Jelena Aleksić, D. Dominis Prester, Daniel Mazin, G. Maneva, Julian Sitarek, Fabio Zandanel, A. Saggion, Patrick Vogler, Dario Hrupec, Nikola Godinovic, M. Asensio, M. Salvati, Adrian Biland, Oscar Blanch, Ralph Bock, L. O. Takalo, Elisa Prandini, M. A. Perez-Torres, Daniela Hadasch, T. Schweizer, M. Shayduk, Artemio Herrero, David Paneque, R. Reinthal, Louis Antonelli, Jose Luis Contreras, Francisco Prada, Stefano Covino, Mosè Mariotti, Juan Cortina, A. De Angelis, Nijil Mankuzhiyil, I. Snidaric, Damir Lelas, Diego F. Torres, P. Munar-Adrover, A. Cañellas, C. Delgado Mendez, M. Pasanen, Dorota Sobczyńska, Michael Backes, J. Krause, R. J. García López, B. De Lotto, Francesco Dazzi, K. Berger, Victor Zabalza, G. De Caneva, S. Spiro, E. Lorenz, E. Carmona, A. Diago Ortega, Robert Wagner, Markus Garczarczyk, Saverio Lombardi, E. Leonardo, D. Tescaro, M. Makariev, M. Pilia, J. Pochon, A. Sillanpää, Victor Stamatescu, Felix Spanier, J. Rico, D. Hildebrand, L. Peruzzo, Takashi Saito, P. G. Prada Moroni, R. Zanin, B. Huber, O. Tibolla, Reiko Orito, Daniel Ferenc, H. Vankov, Ilana M. Braun, Massimo Persic, T. Krähenbühl, S. Klepser, G. Bonnoli, M. V. Fonseca, N. Strah, Christian Fruck, T. Jogler, B. Steinke, M. López, S. Rügamer, Juan Abel Barrio, D. Borla Tridon, I. Puljak, A. La Barbera, J. Becerra González, Mario Meucci, M. Doert, Denis Bastieri, Q. Weitzel, Tihomir Surić, Karl Mannheim, Marc Ribó, Andrei Berdyugin, J. Hose, A. López-Oramas, D. Elsaesser, Alessandro Carosi, D. Garrido, Jose Miguel Miranda, C. Schultz, V. Scapin, Felicitas Pauss, L. Maraschi, Hajime Takami, Tomislav Terzić, E. De Cea del Pozo, and A. Domi´nguez

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, Stereoscopy, Astrophysics, gamma ray astronomy, Cosmic rays, IMAGING CHERENKOV DETECTOR, 01 natural sciences, Neutron stars, law.invention, law, Gamma ray astronomy, 0103 physical sciences, Astronomia de raigs gamma, Astrophysics::Solar and Stellar Astrophysics, Angular resolution, MAGIC (telescope), 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Zenith, Cherenkov radiation, Astrophysics::Galaxy Astrophysics, Estels de neutrons, Physics, 010308 nuclear & particles physics, ATMOSPHERIC CHERENKOV TELESCOPES, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Gamma-ray astronomy, PULSAR, gamma-ray astronomy, Cherenkov telescopes, Crab Nebula, ARRAYS, ddc:540, FLARES, TEV, Electrónica, Física nuclear, Astrophysics::Earth and Planetary Astrophysics, Electricidad, Astrophysics - Instrumentation and Methods for Astrophysics, GAMMA-RAY EMISSION, astro-ph.IM
Abstract

MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of La Palma. Since autumn 2009 both telescopes have been working together in stereoscopic mode, providing a significant improvement with respect to the previous single-telescope observations. We use observations of the Crab Nebula taken at low zenith angles to assess the performance of the MAGIC stereo system. The trigger threshold of the MAGIC telescopes is 50-60 GeV. Advanced stereo analysis techniques allow MAGIC to achieve a sensitivity as good as (0.76 +/- 0.03)% of the Crab Nebula flux in 50 h of observations above 290 GeV. The angular resolution at those energies is better than ~0.07 degree. We also perform a detailed study of possible systematic effects which may influence the analysis of the data taken with the MAGIC telescopes., Comment: 15 pages, 19 figures, 4 tables, added run-by-run systematics study, and the study of angular resolution as the function of the distance to the camera centre, accepted for publication in Astroparticle Physics

Published
2012

2. G-APDs in Cherenkov astronomy: The FACT camera

Author

Thomas Bretz, Francesca Nessi-Tedaldi, T. Krähenbühl, B. Krumm, J.-P. Lenain, Wolfgang Rhode, Ulf Roser, U. Horisberger, Oliver Grimm, Adrian Biland, J.-H. Köhne, K. S. Kim, Q. Weitzel, R. Walter, K. Warda, M. Meharga, H. Anderhub, Werner Lustermann, Karl Mannheim, Daniela Dorner, G. Viertel, M. Lee, E. Lorenz, Michael Backes, A. Gendotti, O. Tibolla, B. Huber, D. Neise, V. Commichau, H. von Gunten, L. Djambazov, D. Hildebrand, A. Boller, M. Ribordy, Julia Thaele, J.-P. Stucki, A.-K. Overkemping, J. Schneider, Patrick Vogler, C. Farnier, Dieter Renker, Ilana M. Braun, R. Rohlfs, Felicitas Pauss, and Etienne Lyard

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Gamma-ray astronomy, business.industry, Cherenkov detector, Astronomy, Avalanche photodiode, Photodiode, law.invention, Telescope, Optics, Silicon photomultiplier, Cherenkov telescope, law, Optoelectronics, business, Geiger-mode avalanche photodiode, Instrumentation, Cherenkov radiation
Abstract

Geiger-mode avalanche photodiodes (G-APD, SiPM) are a much discussed alternative to photomultiplier tubes in Cherenkov astronomy. The First G-APD Cherenkov Telescope (FACT) collaboration builds a camera based on a hexagonal array of 1440 G-APDs and has now finalized its construction phase. A light-collecting solid PMMA cone is glued to each G-APD to eliminate dead space between the G-APDs by increasing the active area, and to restrict the light collection angle of the sensor to the reflector area in order to reduce the amount of background light. The processing of the signals is integrated in the camera and includes the digitization using the domino ring sampling chip DRS4. (C) 2011 Elsevier B.V. All rights reserved.

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