Constraints on the Steady and Pulsed Very High Energy Gamma-Ray Emission from Observations of PSR B1951+32/CTB 80 with the MAGIC Telescope

doi:10.1086/521807

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J. Albert et al. 2007 ApJ 669 1143 doi:10.1086/521807

Constraints on the Steady and Pulsed Very High Energy Gamma-Ray Emission from Observations of PSR B1951+32/CTB 80 with the MAGIC Telescope

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J. Albert¹, E. Aliu², H. Anderhub³, P. Antoranz⁴, A. Armada², C. Baixeras⁵, J. A. Barrio⁴, H. Bartko⁶, D. Bastieri⁷, J. K. Becker⁸, W. Bednarek⁹, K. Berger¹, C. Bigongiari⁷, A. Biland³, R. K. Bock^6,7, P. Bordas¹⁰, V. Bosch-Ramon¹⁰, T. Bretz¹, I. Britvitch³, M. Camara⁴, E. Carmona⁶, A. Chilingarian¹¹, J. A. Coarasa⁶, S. Commichau³, J. L. Contreras⁴, J. Cortina², M. T. Costado¹², V. Curtef⁸, V. Danielyan¹¹, F. Dazzi⁷, A. De Angelis¹³, C. Delgado¹², R. de los Reyes⁴, B. De Lotto¹³, E. Domingo-Santamaría², D. Dorner¹, M. Doro⁷, M. Errando², M. Fagiolini¹⁴, D. Ferenc¹⁵, E. Fernández², R. Firpo², J. Flix², M. V. Fonseca⁴, L. Font⁵, M. Fuchs⁶, N. Galante⁶, R. García-López¹², M. Garczarczyk⁶, M. Gaug⁷, M. Giller⁹, F. Goebel⁶, D. Hakobyan¹¹, M. Hayashida⁶, T. Hengstebeck¹⁶, A. Herrero¹², K. Hirotani¹⁷, D. Höhne¹, J. Hose⁶, C.-C. Hsu⁶, P. Jacon⁹, T. Jogler⁶, R. Kosyra⁶, D. Kranich³, R. Kritzer¹, A. Laille¹⁵, E. Lindfors¹⁸, S. Lombardi⁷, F. Longo¹³, J. López², M. López⁴, E. Lorenz^3,6, P. Majumdar⁶, G. Maneva¹⁹, K. Mannheim¹, O. Mansutti¹³, M. Mariotti⁷, M. Martínez², D. Mazin⁶, C. Merck⁶, M. Meucci¹⁴, M. Meyer¹, J. M. Miranda⁴, R. Mirzoyan⁶, S. Mizobuchi⁶, A. Moralejo², D. Nieto⁴, K. Nilsson¹⁸, J. Ninković⁶, E. Oña-Wilhelmi², N. Otte^6,16,20, I. Oya⁴, D. Paneque⁶, M. Panniello¹², R. Paoletti¹⁴, J. M. Paredes¹⁰, M. Pasanen¹⁸, D. Pascoli⁷, F. Pauss³, R. Pegna¹⁴, M. Persic^13,21, L. Peruzzo⁷, A. Piccioli¹⁴, M. Poller¹, E. Prandini⁷, N. Puchades², A. Raymers¹¹, W. Rhode⁸, M. Ribó¹⁰, J. Rico², M. Rissi³, A. Robert⁵, S. Rügamer¹, A. Saggion⁷, A. Sánchez⁵, P. Sartori⁷, V. Scalzotto⁷, V. Scapin¹³, R. Schmitt¹, T. Schweizer⁶, M. Shayduk^6,16, K. Shinozaki⁶, S. N. Shore²², N. Sidro², A. Sillanpää¹⁸, D. Sobczyńska⁹, A. Stamerra¹⁴, L. S. Stark³, L. Takalo¹⁸, P. Temnikov¹⁹, D. Tescaro², M. Teshima⁶, N. Tonello⁶, D. F. Torres^2,23, N. Turini¹⁴, H. Vankov¹⁹, V. Vitale¹³, R. M. Wagner⁶, T. Wibig⁹, W. Wittek⁶, F. Zandanel⁷, R. Zanin² and J. Zapatero⁵

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otte@mppmu.mpg.de

¹ Universität Würzburg, D-97074 Würzburg, Germany
² Institut de Física d'Altes Energies, Edifici Cn., E-08193 Bellaterra (Barcelona), Spain
³ ETH Zürich, CH-8093 Zurich, Switzerland
⁴ Universidad Complutense, E-28040 Madrid, Spain
⁵ Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
⁶ Max-Planck-Institut für Physik, D-80805 Munich, Germany
⁷ Università di Padova and INFN, I-35131 Padua, Italy
⁸ Universität Dortmund, D-44227 Dortmund, Germany
⁹ University of Łódź, PL-90236 Lodz, Poland
¹⁰ Universitat de Barcelona, E-08028 Barcelona, Spain
¹¹ Yerevan Physics Institute, AM-375036 Yerevan, Armenia
¹² Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
¹³ Università di Udine and INFN Trieste, I-33100 Udine, Italy
¹⁴ Università di Siena and INFN Pisa, I-53100 Siena, Italy
¹⁵ University of California, Davis, CA 95616-8677
¹⁶ Humboldt-Universität zu Berlin, D-12489 Berlin, Germany
¹⁷ ASIAA/National Tsing Hua University-TIARA, P.O. Box 23-141, Taipei, Taiwan
¹⁸ Tuorla Observatory, Turku University, FI-21500 Piikkiö, Finland
¹⁹ Institute for Nuclear Research and Nuclear Energy, BG-1784 Sofia, Bulgaria
²⁰ Author to whom correspondence should be addressed
²¹ INAF/Osservatorio Astronomico and INFN Trieste, I-34131 Trieste, Italy
²² Università di Pisa and INFN Pisa, I-56126 Pisa, Italy
²³ ICREA and Institut de Ciències de l'Espai, IEEC-CSIC, E-08193 Bellaterra, Spain

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Abstract References Cited By

We report on very high energy γ-ray observations with the MAGIC Telescope of the pulsar PSR B1951+32 and its associated nebula, CTB 80. Our data constrain the cutoff energy of the pulsar to be less than 32 GeV, assuming the pulsed γ-ray emission to be exponentially cut off. In the case that the cutoff follows a superexponential behavior, the cutoff energy can be as high as ~60 GeV. The upper limit on the flux of pulsed γ-ray emission above 75 GeV is 4.3 × 10^-11 photons cm^-2 s^-1, and the upper limit on the flux of steady emission above 140 GeV is 1.5 × 10^-11 photons cm^-2 s^-1. We discuss our results in the framework of recent model predictions and other studies.

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Constraints on the Steady and Pulsed Very High Energy Gamma-Ray Emission from Observations of PSR B1951+32/CTB 80 with the MAGIC Telescope

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