Upper Limit for Γ-ray Emission above 140gev from the Dwarf Spheroidal Galaxy Draco

The nearby dwarf spheroidal galaxy Draco with its high mass to light ratio is one of the most auspicious targets for indirect dark matter (DM) searches. Annihilation of hypothetical DM particles can result in high-energy γ-rays, e.g. from neutralino annihilation in the supersymmetric framework. With the MAGIC telescope a search for a possible DM signal originating from Draco was performed during 2007. The analysis of the data results in a flux upper limit (2σ) of 1.1 × 10 photons cm sec for photon energies above 140GeV, assuming a point like source. Furthermore, a comparison with predictions from supersymmetric models is given. While our results do not constrain the mSUGRA phase parameter space, a very high flux enhancement can be ruled out. Subject headings: Indirect Dark Matter Search, SUSY, Imaging Air Cherenkov Telescope a Universität Würzburg, D-97074 Würzburg, Germany b IFAE, Edifici Cn., E-08193 Bellaterra (Barcelona), Spain c ETH Zurich, CH-8093 Switzerland d Universidad Complutense, E-28040 Madrid, Spain e Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain f Max-Planck-Institut für Physik, D-80805 München, Germany g Università di Padova and INFN, I-35131 Padova, Italy h Universität Dortmund, D-44227 Dortmund, Germany i University of Lódź, PL-90236 Lodz, Poland j Universitat de Barcelona, E-08028 Barcelona, Spain k Yerevan Physics Institute, AM-375036 Yerevan, Armenia l Tuorla Observatory, Turku University, FI-21500 Piikkiö, Finland m Inst. de Astrofisica de Canarias, E-38200, La Laguna, Tenerife, Spain n Università di Udine, and INFN Trieste, I-33100 Udine, Italy o Università di Siena, and INFN Pisa, I-53100 Siena, Italy p University of California, Davis, CA-95616-8677, USA q Humboldt-Universität zu Berlin, D-12489 Berlin, Germany r Inst. for Nucl. Research and Nucl. Energy, BG-1784 Sofia, Bulgaria s INAF/Osservatorio Astronomico and INFN, I-34131 Trieste, Italy t Università di Pisa, and INFN Pisa, I-56126 Pisa, Italy u ICREA & Institut de Cienciès de l’Espai (IEEC-CSIC), E08193 Bellaterra, Spain v Depto. de Astrofisica, Universidad, E-38206 La Laguna, Tenerife, Spain w Instituto de Astrofisica de Andalucia (CSIC), E-18008 Granada, Spain