Performance of the MAGIC stereo system obtained with Crab Nebula data

J Aleksić,D Höhne-Mönch,E De Cea Del Pozo,A Saggion,B Steinke,S Lombardi,M Meucci,J Pochon,S Spiro,D Hadasch,C Delgado Mendez,T Terzić,K Mannheim,M Pasanen,K Nilsson,O Tibolla,D Ferenc,P Colin,D Borla Tridon,D Dorner,S Rügamer,B De Lotto,J Krause,I Puljak,D Bastieri,P Munar-Adrover,S Klepser,D Dominis Prester,H Kellermann,L Maraschi,J Storz,I Braun,A Biland,A Moralejo,A Carosi,R Paoletti,D Lelas,V Zabalza,M Shayduk,A Sillanpää,A Stamerra,V Scalzotto,I Oya,K Satalecka,A Herrero,F Zandanel,G De Caneva,D Nieto,M Pilia,T Schweizer,E Prandini,J Cortina,A De Angelis,W Rhode,M Doro,P Antoranz,E Colombo,M Makariev,N Godinović,D Häfner,R Orito,D Paneque,H Miyamoto,R Reinthal,T Bretz,T Surić,C Schultz,S Covino,M Doert,S Partini,J Moldón,G Maneva,D Tescaro,J Hose,M López,L Peruzzo,N Strah,J Sitarek,A López-Oramas,M Uellenbeck,R Mirzoyan,W Bednarek,M Garczarczyk,A Cañellas,E Lindfors,J Becerra González,V Scapin,J Rico,I Reichardt,A Diago Ortega,A La Barbera,H Vankov,P Temnikov,A Berdyugin,M Mariotti,L Cossio,H Takami,T Jogler,M Salvati,N Mankuzhiyil,A Treves,Q Weitzel,D Mazin,F Spanier,G Giavitto,K Berger,D Hildebrand,M Ribó,C Fruck,M Teshima,M Asensio,E Carmona,O Blanch,G Bonnoli,R Zanin,E Leonardo,E Lorenz,E Bernardini,T Krähenbühl,F Tavecchio,F Dazzi,V Stamatescu,L Font,P Vogler,A Boller,Iva Šnidarić ,T Saito ,D Sobczyńska ,S N Shore ,D Elsäesser ,J A Barrio ,Michael Backes ,D F Torres ,J M Miranda ,M Peršić ,Daniel Garrido ,Ezequiel Álvarez ,Sharon Pardo ,Koji Saito ,L A Antonelli ,R López ,R Böck ,L O Takalo ,M A Pérez-Torres ,A Domı ́Nguez ,J L Contreras ,Bernhard A Huber ,Francisco Prada ,F Pauß ,J M Paredes ,P G Prada Moroni ,Dario Hrupec ,M Martı ́Nez ,M V Fonseca ,R M Wagner

doi:10.1016/j.astropartphys.2011.11.007

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 50−60GeV. Advanced stereo analysis techniques allow MAGIC to achieve a sensitivity as good as (0.76±0.03)% of the Crab Nebula flux in 50h of observations above 290GeV. The angular resolution at those energies is better than ∼0.07°. We also perform a detailed study of possible systematic effects which may influence the analysis of the data taken with the MAGIC telescopes.

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