2026-05-26T06:47:06Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/134022025-09-18T12:24:32Zcom_20.500.14352_14col_20.500.14352_15
Barrio Uña, Juan Abel
Contreras González, José Luis
Domínguez Díaz, Alberto
López Moya, Marcos
Nievas Rosillo, Mireia
Carreto Fidalgo, David Friedrich
Fonseca González, María Victoria
Hoang, Kim Dinh
Peñil Del Campo, Pablo
Saha, Lab
2023-06-17T13:24:38Z
2023-06-17T13:24:38Z
2019-03
0035-8711
10.1093/mnras/sty3387
https://hdl.handle.net/20.500.14352/13402
http://dx.doi.org/10.1093/mnras/sty3387
https://academic.oup.com/mnras/
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.
eng
open access
Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC
journal article