RT Journal Article
T1 Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Domínguez Díaz, Alberto
A1 López Moya, Marcos
A1 Nievas Rosillo, Mireia
A1 Carreto Fidalgo, David Friedrich
A1 Fonseca González, María Victoria
A1 Hoang, Kim Dinh
A1 Peñil Del Campo, Pablo
A1 Saha, Lab
AB 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.
PB Wiley
SN 0035-8711
YR 2019
FD 2019-03
LK https://hdl.handle.net/20.500.14352/13402
UL https://hdl.handle.net/20.500.14352/13402
LA eng
NO Ministerio de Economía y Competitividad (España)
NO Centro de Excelencia Severo Ochoa
NO Unidad de Excelencia María de Maeztu
NO German Federal Ministry of Education and Research
NO Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
NO Istituto Nazionale di Fisica Nucleare
NO Istituto Nazionale Astrofisica
NO Swiss National Fund SNF Swiss National Science Foundation
NO Japanese Ministry of Education, Culture, Sports, Science and Technology
NO Croatian Science Foundation
NO University of Rijeka
NO DFG Collaborative Research Centres
NO Polish National Research Centre
NO  Ministério da Ciência, Tecnologia e Inovações (Brasil)
NO National Council for Scientific and Technological Development
NO Carlos Chagas Filho Foundation for Research Support of the State of Rio de Janeiro
NO Fondo Europeo de Desarrollo Regional
DS Docta Complutense
RD 22 abr 2025