Observation of VHE γ-rays from Cassiopeia A with the MAGIC telescope

Aims: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...

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Detalles Bibliográficos
Autores: Albert, J., Aliu, E., Armada, A., Baixeras Divar, Carmen, Bordas Coma, Pol, Bosch i Ramon, Valentí, Cortina Blanco, Juan, Domingo Santamaría, Eva, Errando, M., Fernández Sánchez, Enrique, Firpo, R., Flix, J., Font, L., López, J., Martínez, Mario, Moralejo, Abelardo, Oña-Wilhelmi, Emma de, Paredes i Poy, Josep Maria, Puchades, N., Ribó Gomis, Marc
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2007
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/45191
Acceso en línea:https://hdl.handle.net/2445/45191
Access Level:acceso abierto
Palabra clave:Raigs còsmics
Raigs gamma
Supernoves
Astronomia
Astrofísica
Telescopis espacials
Cosmic rays
Gamma rays
Supernovae
Astronomy
Astrophysics
Space telescopes
Descripción
Sumario:Aims: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.

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