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Título:
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Discovery of TeV ?-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC
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Autores:
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Barrio Uña, Juan Abel ;
Contreras González, José Luis ;
Domínguez Díaz, Alberto ;
Carreto Fidalgo, David Friedrich ;
Fonseca González, Mª Victoria ;
Hoang, Kim Dinh ;
López Moya, Marcos ;
Nievas Rosillo, Mireia ;
Peñil del Campo, Pablo ;
Saha, Lab ;
otros, ...
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Tipo de documento:
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texto impreso
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Editorial:
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Wiley, 2019-03
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física nuclear
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Tipo = Artículo
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Resumen:
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SNR G24.7+0.6 is a 9.5 kyrs radio and gamma-ray supernova remnant evolving in a dense medium. In the GeV regime, SNR G24.7+0.6 (3FHL J1834.1-0706e/FGFS J1834.1-0706) shows a hard spectral index (Gamma similar to 2) up to 200 GeV, which makes it a good candidate to be observed with Cherenkov telescopes such as MAGIC. We observed the field of view of SNR G24.7+0.6 with the MAGIC telescopes for a total of 31 h. We detect very high-energy gamma-ray emission from an extended source located 0.34 degrees away from the centre of the radio SNR. The new source, named MAGIC J1835-069 is detected up to 5 TeV, and its spectrum is well-represented by a power-law function with spectral index of 2.74 +/- 0.08. The complexity of the region makes the identification of the origin of the very high-energy emission difficult; however, the spectral agreement with the LAT source and overlapping position at less than 1.5 sigma point to a common origin. We analysed 8 yr of Fermi-LAT data to extend the spectrum of the source down to 60 MeV. Fermi-LAT and MAGIC spectra overlap within errors and the global broad-band spectrum is described by a power law with exponential cut-off at 1.9 +/- 0.5 TeV. The detected gamma-ray emission can be interpreted as the results of proton-proton interaction between the supernova and the CO-rich surrounding.
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En línea:
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https://eprints.ucm.es/57873/1/ContrerasJL23preprint.pdf
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