A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Discovery of TeV gamma-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC
Tekijät: Acciari VA, Ansoldi S, Antonelli LA, Engels AA, Arcaro C, Baack D, Babic A, Banerjee B, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, 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 SM, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Cumani P, D'Elia V, Vela P, Dazzi F, Angelis A, Lotto B, Delfino M, Delgado J, Pierro F, Dominguez A, Prester DD, Dorner D, Doro M, Einecke S, Elsaesser D, Ramazani VF, Fattorini A, Fernandez-Barral A, Ferrara G, Fidalgo D, Foffano L, Fonseca MV, Font L, Fruck C, Galindo D, Gallozzi S, Lopez RJ, Garczarczyk M, Gaug M, Giammaria P, Godinovic 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, Kuvezdic D, Lamastra A, Lelas D, Leone F, Lindfors E, Lombardi S, Longo F, Lopez M, Lopez-Oramas A, Maggio C, Majumdar P, Makariev M, Maneva G, Manganaro M, Mannheim K, Maraschi L, Mariotti M, Martinez M, Masuda S, Mazin D, Minev M, Miranda JM, Mirzoyan R, Molina E, Moralejo A, Moreno V, Moretti E, Neustroev V, Niedzwiecki A, Rosillo M, Nigro C, Nilsson K, Ninci D, Nishijima K, Noda K, Nogues L, Paiano S, Palacio J, Paneque D, Paoletti R, Paredes JM, Pedaletti G, Penil P, Peresano M, Persic M, Moroni PGP, Prandini E, Puljak I, Garcia JR, Rhode W, Ribo M, Rico J, Righi C, Rugliancich A, Saha L, Saito T, Satalecka K, Schweizer T, Sitarek J, Snidaric I, Sobczynska D, Somero A, Stamerra A, Strzys M, Suric T, Tavecchio F, Temnikov P, Terzic T, Teshima M, Torres-Alba N, Tsujimoto S, Vanzo G, Acosta M, Vovk I, Ward JE, Will M, Zaric D, Wilhelmi EO, Torres DF, Zanin R, Torres DF, Zanin R; MAGIC Collaboration
Kustantaja: OXFORD UNIV PRESS
Julkaisuvuosi: 2019
Journal: Monthly Notices of the Royal Astronomical Society
Tietokannassa oleva lehden nimi: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Lehden akronyymi: MON NOT R ASTRON SOC
Vuosikerta: 483
Numero: 4
Aloitussivu: 4578
Lopetussivu: 4585
Sivujen määrä: 8
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/sty3387
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/40018616
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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