Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC

Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC

http://urn.fi/urn:nbn:fi-fe2019102935499

Teksti

Acciari, V. A. (V. A.) ; Ansoldi, S. (S.) ; Antonelli, L. A. (L. A.) ; Engels, A. A. (A. Arbet) ; Arcaro, C. (C.) ; Baack, D. (D.) ; Babic, A. (A.) ; Banerjee, B. (B.) ; Bangale, P. (P.) ; de Almeida, U. B. (U. Barres) ; Barrio, J. A. (J. A.) ; Becerra Gonzalez, J. (J.) ; Bednarek, W. (W.) ; Bernardini, E. (E.) ; Berti, A. (A.) ; Besenrieder, J. (J.) ; Bhattacharyya, W. (W.) ; Bigongiari, C. (C.) ; Biland, A. (A.) ; Blanch, O. (O.) ; Bonnoli, G. (G.) ; Carosi, R. (R.) ; Ceribella, G. (G.) ; Chatterjee, A. (A.) ; Colak, S. M. (S. M.) ; Colin, P. (P.) ; Colombo, E. (E.) ; Contreras, J. L. (J. L.) ; Cortina, J. (J.) ; Covino, S. (S.) ; Cumani, P. (P.) ; D'Elia, V. (V.) ; Da Vela, P. (P.) ; Dazzi, F. (F.) ; De Angelis, A. (A.) ; De Lotto, B. (B.) ; Delfino, M. (M.) ; Delgado, J. (J.) ; Di Pierro, F. (F.) ; Dominguez, A. (A.) ; Prester, D. D. (D. Dominis) ; Dorner, D. (D.) ; Doro, M. (M.) ; Einecke, S. (S.) ; Elsaesser, D. (D.) ; Ramazani, V. F. (V. Fallah) ; Fattorini, A. (A.) ; Fernandez-Barral, A. (A.) ; Ferrara, G. (G.) ; Fidalgo, D. (D.) ; Foffano, L. (L.) ; Fonseca, M. V. (M. V.) ; Font, L. (L.) ; Fruck, C. (C.) ; Galindo, D. (D.) ; Gallozzi, S. (S.) ; Garcia Lopez, R. J. (R. J.) ; Garczarczyk, M. (M.) ; Gaug, M. (M.) ; Giammaria, P. (P.) ; Godinovic, N. (N.) ; Guberman, D. (D.) ; Hadasch, D. (D.) ; Hahn, A. (A.) ; Hassan, T. (T.) ; Herrera, J. (J.) ; Hoang, J. (J.) ; Hrupec, D. (D.) ; Inoue, S. (S.) ; Ishio, K. (K.) ; Iwamura, Y. (Y.) ; Kubo, H. (H.) ; Kushida, J. (J.) ; Kuvezdic, D. (D.) ; Lamastra, A. (A.) ; Lelas, D. (D.) ; Leone, F. (F.) ; Lindfors, E. (E.) ; Lombardi, S. (S.) ; Longo, F. (F.) ; Lopez, M. (M.) ; Lopez-Oramas, A. (A.) ; Maggio, C. (C.) ; Majumdar, P. (P.) ; Makariev, M. (M.) ; Maneva, G. (G.) ; Manganaro, M. (M.) ; Mannheim, K. (K.) ; Maraschi, L. (L.) ; Mariotti, M. (M.) ; Martinez, M. (M.) ; Masuda, S. (S.) ; Mazin, D. (D.) ; Minev, M. (M.) ; Miranda, J. M. (J. M.) ; Mirzoyan, R. (R.) ; Molina, E. (E.) ; Moralejo, A. (A.) ; Moreno, V. (V.) ; Moretti, E. (E.) ; Neustroev, V. (V.) ; Niedzwiecki, A. (A.) ; Nievas Rosillo, M. (M.) ; Nigro, C. (C.) ; Nilsson, K. (K.) ; Ninci, D. (D.) ; Nishijima, K. (K.) ; Noda, K. (K.) ; Nogues, L. (L.) ; Paiano, S. (S.) ; Palacio, J. (J.) ; Paneque, D. (D.) ; Paoletti, R. (R.) ; Paredes, J. M. (J. M.) ; Pedaletti, G. (G.) ; Penil, P. (P.) ; Peresano, M. (M.) ; Persic, M. (M.) ; Moroni, P. G. (P. G. Prada) ; Prandini, E. (E.) ; Puljak, I. (I.) ; Garcia, J. R. (J. R.) ; Rhode, W. (W.) ; Ribo, M. (M.) ; Rico, J. (J.) ; Righi, C. (C.) ; Rugliancich, A. (A.) ; Saha, L. (L.) ; Saito, T. (T.) ; Satalecka, K. (K.) ; Schweizer, T. (T.) ; Sitarek, J. (J.) ; Snidaric, I. (I.) ; Sobczynska, D. (D.) ; Somero, A. (A.) ; Stamerra, A. (A.) ; Strzys, M. (M.) ; Suric, T. (T.) ; Tavecchio, F. (F.) ; Temnikov, P. (P.) ; Terzic, T. (T.) ; Teshima, M. (M.) ; Torres-Alba, N. (N.) ; Tsujimoto, S. (S.) ; Vanzo, G. (G.) ; Vazquez Acosta, M. (M.) ; Vovk, I. (I.) ; Ward, J. E. (J. E.) ; Will, M. (M.) ; Zaric, D. (D.) ; de Ona Wilhelmi, E. (E.) ; Torres, D. F. (D. F.) ; Zanin, R. (R.)

Oxford University Press

Abstract

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.

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