Bibcode
MAGIC Collaboration; Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; Arbet Engels, A.; Arcaro, C.; Baack, D.; Babić, A.; Banerjee, B.; Bangale, P.; de Almeida, U. Barres; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Carosi, R.; Ceribella, G.; Chatterjee, A.; Colak, S. M.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; Cumani, P.; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; di Pierro, F.; Domínguez, A.; Dominis Prester, D.; Dorner, D.; Doro, M.; Einecke, S.; Elsaesser, D.; Fallah Ramazani, V.; Fattorini, A.; Fernández-Barral, A.; Ferrara, G.; Fidalgo, D.; Foffano, L.; Fonseca, M. V.; Font, L.; Fruck, C.; Galindo, D.; Gallozzi, S.; García López, R. J.; Garczarczyk, M.; Gaug, M.; Giammaria, P.; Godinović, N.; Guberman, D.; Hadasch, D.; Hahn, A.; Hassan, T.; Herrera, J.; Hoang, J.; Hrupec, D.; Inoue, S.; Ishio, K.; Iwamura, Y.; Kubo, H.; Kushida, J.; Kuveždić, D.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; López-Oramas, A.; Maggio, C.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Masuda, S.; Mazin, D.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Moreno, V. et al.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 483, Issue 4, p.4578-4585
Advertised on:
3
2019
Citations
6
Refereed citations
6
Description
SNR G24.7+0.6 is a 9.5 kyrs radio and γ-ray supernova remnant
evolving in a dense medium. In the GeV regime, SNR G24.7+0.6 (3FHL
J1834.1-0706e/FGES J1834.1-0706) shows a hard spectral index (Γ
˜ 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 γ-ray emission from an extended source
located 0.34° 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 1.5σ 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 γ-ray emission can be interpreted as the results
of proton-proton interaction between the supernova and the CO-rich
surrounding.
Related projects
Particle Astrophysics
The MAGIC Collaboration is integrated by 20 research institutes and university departments from Armenia, Bulgaria, Finland, Germany, Italy, Poland, Spain, Switzerland and USA. The collaboration comprises two 17m diameter telescopes, located at the Roque de los Muchachos Observatory, designed to measure the Cherenkov radiation associated with
Ramón
García López