2026-05-28T10:51:12Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/134022025-09-18T12:24:32Zcom_20.500.14352_14col_20.500.14352_15

Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC 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 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. 2023-06-17T13:24:38Z 2023-06-17T13:24:38Z 2023-06-17T13:24:38Z 2019-03 journal article https://hdl.handle.net/20.500.14352/13402 0035-8711 10.1093/mnras/sty3387 eng (FPA2015- 69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015- 69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6- 6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015- 71662-C2-2-P, CSD2009-00064) SEV-2012-0234 SEV-2015-0548 MDM-2014-0369 IP-2016-06-9782 13.12.1.3.02 SFB823/C4 SFB876/C3 UMO-2016/22/M/ST9/00382 open access Wiley