Albert, J.Aliu, E.Armada, A.Baixeras Divar, CarmenBordas Coma, PolBosch i Ramon, ValentíCortina Blanco, JuanDomingo Santamaría, EvaErrando, M.Fernández Sánchez, EnriqueFirpo, R.Flix, J.Font, L.López, J.Martínez, MarioMoralejo, AbelardoOña-Wilhelmi, Emma deParedes i Poy, Josep MariaPuchades, N.Ribó Gomis, Marc2013-07-262013-07-2620070004-6361https://hdl.handle.net/2445/45191Aims:We searched for very high energy (VHE) γ-ray emission from the supernova remnant Cassiopeia A Methods: The shell-type supernova remnant Cassiopeia A was observed with the 17 m MAGIC telescope between July 2006 and January 2007 for a total time of 47 h. Results: The source was detected above an energy of 250 GeV with a significance of 5.2σ and a photon flux above 1 TeV of (7.3 ± 0.7_stat ± 2.2_sys) × 10-13 cm-2s-1. The photon spectrum is compatible with a power law dN/dE ∝ E-Γ with a photon index Γ = 2.3 ± 0.2_stat ± 0.2_sys. The source is point-like within the angular resolution of the telescope.4 p.application/pdfeng(c) Springer Verlag, 2007Raigs còsmicsRaigs gammaSupernovesAstronomiaAstrofísicaTelescopis espacialsCosmic raysGamma raysSupernovaeAstronomyAstrophysicsSpace telescopesinfo:eu-repo/semantics/article5552832013-07-26info:eu-repo/semantics/openAccess