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arxiv: 1108.1477 · v2 · submitted 2011-08-06 · 🌌 astro-ph.IM

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Performance of the MAGIC stereo system obtained with Crab Nebula data

MAGIC Collaboration: J. Aleksi\'c (1) , E. A. Alvarez (2) , L. A. Antonelli (3) , P. Antoranz (4) , M. Asensio (2) , M. Backes (5) , J. A. Barrio (2) , D. Bastieri (6)
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J. Becerra Gonz\'alez (7 8) W. Bednarek (9) A. Berdyugin (10) K. Berger (7 E. Bernardini (11) A. Biland (12) O. Blanch (1) R. K. Bock (13) A. Boller (12) G. Bonnoli (3) D. Borla Tridon (13) I. Braun (12) T. Bretz (14 26) A. Ca\~nellas (15) E. Carmona (13) A. Carosi (3) P. Colin (13) E. Colombo (7) J. L. Contreras (2) J. Cortina (1) L. Cossio (16) S. Covino (3) F. Dazzi (16 27) A. De Angelis (16) G. De Caneva (11) E. de Cea del Pozo (17) B. De Lotto (16) C. Delgado Mendez (7 28) A. Diago Ortega (7 M. Doert (5) A. Dom\'inguez (18) D. Dominis Prester (19) D. Dorner (12) M. Doro (20) D. Eisenacher (14) D. Elsaesser (14) D. Ferenc (19) M. V. Fonseca (2) L. Font (20) C. Fruck (13) R. J. Garc\'ia L\'opez (7 M. Garczarczyk (7) D. Garrido (20) G. Giavitto (1) N. Godinovi\'c (19) D. Hadasch (17) D. H\"afner (13) A. Herrero (7 D. Hildebrand (12) D. H\"ohne-M\"onch (14) J. Hose (13) D. Hrupec (19) T. Jogler (13) H. Kellermann (13) S. Klepser (1) T. Kr\"ahenb\"uhl (12) J. Krause (13) J. Kushida (13) A. La Barbera (3) D. Lelas (19) E. Leonardo (4) E. Lindfors (10) S. Lombardi (6) M. L\'opez (2) A. L\'opez-Oramas (1) E. Lorenz (12 13) M. Makariev (21) G. Maneva (21) N. Mankuzhiyil (16) K. Mannheim (14) L. Maraschi (3) B. Marcote (15) M. Mariotti (6) M. Mart\'inez (1) D. Mazin (1 M. Meucci (4) J. M. Miranda (4) R. Mirzoyan (13) J. Mold\'on (15) A. Moralejo (1) P. Munar-Adrover (15) D. Nieto (2) K. Nilsson (10 29) R. Orito (13) I. Oya (2) D. Paneque (13) R. Paoletti (4) S. Pardo (2) J. M. Paredes (15) S. Partini (4) M. A. Perez-Torres (1) M. Persic (16 22) L. Peruzzo (6) M. Pilia (23) J. Pochon (7) F. Prada (18) P. G. Prada Moroni (24) E. Prandini (6) I. Puerto Gimenez (7) I. Puljak (19) I. Reichardt (1) R. Reinthal (10) W. Rhode (5) M. Rib\'o (15) J. Rico (25 1) S. R\"ugamer (14) A. Saggion (6) K. Saito (13) T. Y. Saito (13) M. Salvati (3) K. Satalecka (2) V. Scalzotto (6) V. Scapin (2) C. Schultz (6) T. Schweizer (13) M. Shayduk (13) S. N. Shore (24) A. Sillanp\"a\"a (10) J. Sitarek (9) I. Snidaric (19) D. Sobczynska (9) F. Spanier (14) S. Spiro (3) V. Stamatescu (1) A. Stamerra (4) B. Steinke (13) J. Storz (14) N. Strah (5) T. Suri\'c (19) L. Takalo (10) H. Takami (13) F. Tavecchio (3) P. Temnikov (21) T. Terzi\'c (19) D. Tescaro (24) M. Teshima (13) O. Tibolla (14) D. F. Torres (25 17) A. Treves (23) M. Uellenbeck (5) H. Vankov (21) P. Vogler (12) R. M. Wagner (13) Q. Weitzel (12) V. Zabalza (15) F. Zandanel (18) R. Zanin (1) ((1) IFAE Edifici Cn. Campus UAB E-08193 Bellaterra Spain (2) Universidad Complutense E-28040 Madrid (3) INAF National Institute for Astrophysics I-00136 Rome Italy (4) Universit\`a di Siena INFN Pisa I-53100 Siena (5) Technische Universit\"at Dortmund D-44221 Dortmund Germany (6) Universit\`a di Padova INFN I-35131 Padova (7) Inst. de Astrof\'isica de Canarias E-38200 La Laguna Tenerife (8) Depto. de Astrof\'isica Universidad de La Laguna E-38206 La Laguna (9) University of \L\'od\'z PL-90236 Lodz Poland (10) Tuorla Observatory University of Turku FI-21500 Piikki\"o Finland (11) Deutsches Elektronen-Synchrotron (DESY) D-15738 Zeuthen (12) ETH Zurich CH-8093 Zurich Switzerland (13) Max-Planck-Institut f\"ur Physik D-80805 M\"unchen (14) Universit\"at W\"urzburg D-97074 W\"urzburg (15) Universitat de Barcelona (ICC/IEEC) E-08028 Barcelona (16) Universit\`a di Udine INFN Trieste I-33100 Udine (17) Institut de Ci\`encies de l'Espai (IEEC-CSIC) (18) Inst. de Astrof\'isica de Andaluc\'ia (CSIC) E-18080 Granada (19) Croatian MAGIC Consortium Rudjer Boskovic Institute University of Rijeka University of Split HR-10000 Zagreb Croatia (20) Universitat Aut\`onoma de Barcelona (21) Inst. for Nucl. Research Nucl. Energy BG-1784 Sofia Bulgaria (22) INAF/Osservatorio Astronomico I-34143 Trieste (23) Universit\`a dell'Insubria Como I-22100 Como (24) Universit\`a di Pisa I-56126 Pisa (25) ICREA E-08010 Barcelona (26) now at: Ecole polytechnique f\'ed\'erale de Lausanne (EPFL) Lausanne (27) supported by INFN Padova (28) now at: Centro de Investigaciones Energ\'eticas Medioambientales y Tecnol\'ogicas (CIEMAT) Madrid (29) now at: Finnish Centre for Astronomy with ESO (FINCA) Finland)
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classification 🌌 astro-ph.IM
keywords magictelescopescrabnebulaobservationsstereosystemanalysis
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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.

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