Magic upper limits for two Milagro-detected bright fermi sources in the region of SNR G65.1+0.6

J. Aleksić, L. A. Antonelli, P. Antoranz, M. Backes, J. A. Barrio, D. Bastieri, J. B. González, W. Bednarek, A. Berdyugin, K. Berger, E. Bernardini, A. Biland, O. Blanch, R. K. Bock, A. Boller, G. Bonnoli, P. Bordas, D. Borla Tridon, V. Bosch-Ramon, D. BoseI. Braun, T. Bretz, M. Camara, E. Carmona, A. Carosi, P. Colin, J. L. Contreras, J. Cortina, S. Covino, F. Dazzi, A. De Angelis, E. De Cea Del Pozo, B. De Lotto, M. De Maria, F. De Sabata, C. Delgado Mendez, A. Diago Ortega, M. Doert, A. Domínguez, D. Dominis Prester, D. Dorner, M. Doro, D. Elsaesser, M. Errando, D. Ferenc, M. V. Fonseca, L. Font, R. J.García López, M. Garczarczyk, M. Gaug, G. Giavitto, N. Godinović, D. Hadasch, A. Herrero, D. Hildebrand, D. Höhne-Mönch, J. Hose, D. Hrupec, T. Jogler, S. Klepser, T. Krähenbühl, D. Kranich, J. Krause, A. La Barbera, E. Leonardo, E. Lindfors, S. Lombardi, F. Longo, M. López, E. Lorenz, P. Majumdar, G. Maneva, N. Mankuzhiyil, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, D. Mazin, M. Meucci, J. M. Miranda, R. Mirzoyan, H. Miyamoto, J. Moldón, A. Moralejo, D. Nieto, K. Nilsson, R. Orito, I. Oya, R. Paoletti, J. M. Paredes, S. Partini, M. Pasanen, F. Pauss, R. G. Pegna, M. A. Perez-Torres, M. Persic, L. Peruzzo, J. Pochon, F. Prada, P. G.Prada Moroni

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Abstract

We report on the observation of the region around supernova remnant G65.1+0.6 with the stand-alone MAGIC-I telescope. This region hosts the two bright GeV gamma-ray sources 1FGL J1954.3+2836 and 1FGL J1958.6+2845. They are identified as GeV pulsars and both have a possible counterpart detected at about 35 TeV by the Milagro observatory. MAGIC collected 25.5 hr of good quality data and found no significant emission in the range around 1 TeV. We therefore report differential flux upper limits, assuming the emission to be point-like (≤0.° 1) or within a radius of 0.° 3. In the point-like scenario, the flux limits around 1 TeV are at the level of 3% and 2% of the Crab Nebula flux for the two sources, respectively. This implies that theMilagro emission is either extended over a much larger area than our point-spread function or it must be peaked at energies beyond 1 TeV, resulting in a photon index harder than 2.2 in the TeV band. © 2010. The American Astronomical Society. All rights reserved.
Original languageEnglish
Pages (from-to)1629-1632
JournalAstrophysical Journal
Volume725
Issue number2
DOIs
Publication statusPublished - 20 Dec 2010

Keywords

  • ISM: supernova remnants

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    Aleksić, J., Antonelli, L. A., Antoranz, P., Backes, M., Barrio, J. A., Bastieri, D., González, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Bordas, P., Tridon, D. B., Bosch-Ramon, V., ... Moroni, P. G. P. (2010). Magic upper limits for two Milagro-detected bright fermi sources in the region of SNR G65.1+0.6. Astrophysical Journal, 725(2), 1629-1632. https://doi.org/10.1088/0004-637X/725/2/1629