Constraints on the steady and pulsed very high energy gamma-ray emission from observations of PSR B1951+32/CTB 80 with the magic telescope

Albert, J; Aliu, E; Anderhub, H; Antoranz, P; Armada, A; Baixeras, C; Barrio, Ja; Bartko, H; Bastieri, Denis; Becker, Jk; Bednarek, W; Berger, K; Bigongiari, C; Biland, A; Bock, Rk; Bordas, P; BOSCH RAMON, V; Bretz, T; Britvitch, I; Camara, M; Carmona, E; Chilingarian, A; Coarasa, Ja; Commichau, S; Contreras, Jl; Cortina, J; Costado, Mt; Curtef, V; Danielyan, V; Dazzi, Francesco; DE ANGELIS, A; Delgado, C; Rdl, Reyes; DE LOTTO, B; DOMINGO SANTAMARIA, E; Dorner, D; Doro, Michele; Errando, M; Fagiolini, M; Ferenc, D; Fernandez, E; Firpo, R; Flix, J; Fonseca, Mv; Font, L; Fuchs, M; Galante, N; GARCIA LOPEZ, R; Garczarczyk, M; Gaug, M; Giller, M; Goebel, F; Hakobyan, D; Hayashida, M; Hengstebeck, T; Herrero, A; Hirotani, K; Dhr, Hne; Hose, J; Hsu, Cc; Jacon, P; Jogler, T; Kosyra, R; Kranich, D; Kritzer, R; Laille, A; Lindfors, E; Lombardi, S; Longo, F; Lopez, J; Lopez, M; Lorenz, E; Majumdar, P; Maneva, G; Mannheim, K; Mansutti, O; Mariotti, Mose'; Martinez, M; Mazin, D; Merck, C; Meucci, M; Meyer, M; Miranda, Jm; Mirzoyan, R; Mizobuchi, S; Moralejo, A; Nieto, D; Nilsson, K; Ninkovic, J; ONA WILHELMI, E; Otte, N; Oya, I; Paneque, D; Panniello, M; Paoletti, R; Paredes, Jm; Pasanen, M; Pascoli, Donatella; Pauss, F; Pegna, R; Persic, M; Peruzzo, Luigi; Piccioli, A; Poller, M; Prandini, E; Puchades, N; Raymers, A; Rhode, W; Ribo, M; Rico, J; Rissi, M; Robert, A; Srr, Gamer; Saggion, Antonio; Sanchez, A; Sartori, Paolo; Scalzotto, VILLI MARIO; Scapin, V; Schmitt, R; Schweizer, T; Shayduk, M; Shinozaki, K; Shore, Sn; Sidro, N; Sillanpaa, A; Sobczynska, D; Stamerra, A; Stark, Ls; Takalo, L; Temnikov, P; Tescaro, D; Teshima, M; Tonello, N; Torres, Df; Turini, N; Vankov, H; Vitale, V; Wagner, Rm; Wibig, T; Wittek, W; Zandanel, F; Zanin, R; Zapatero, J.

doi:10.1086/521807

We report on very high energy gamma-ray observations with the MAGIC Telescope of the pulsar PSR B1951+32 and its associated nebula, CTB 80. Our data constrain the cutoff energy of the pulsar to be less than 32 GeV, assuming the pulsed gamma-ray emission to be exponentially cut off. In the case that the cutoff follows a superexponential behavior, the cutoff energy can be as high as similar to 60 GeV. The upper limit on the flux of pulsed gamma-ray emission above 75 GeV is 4.3; 10(-11) photons cm(-2) s(-1), and the upper limit on the flux of steady emission above 140 GeV is 1.5; 10(-11) photons cm(-2) s(-1). We discuss our results in the framework of recent model predictions and other studies.