We report on the search for 0.1-10 GeV emission from magnetars in 17 months of Fermi Large Area Telescope (LAT) observations. No significant evidence for gamma-ray emission from any of the currently known magnetars is found. The most stringent upper limits to date on their persistent emission in the Fermi energy range are estimated between ~10–12and10–10 erg s–1 cm–2, depending on the source. We also searched for gamma-ray pulsations and possible outbursts, also with no significant detection. The upper limits derived support the presence of a cutoff at an energy below a few MeV in the persistent emission of magnetars. They also show the likely need for a revision of current models of outer-gap emission from strongly magnetized pulsars, which, in some realizations, predict detectable GeV emission from magnetars at flux levels exceeding the upper limits identified here using the Fermi-LAT observations.

SEARCH FOR GAMMA-RAY EMISSION FROM MAGNETARS WITH THE FERMI LARGE AREA TELESCOPE

BALDINI, LUCA;RAZZANO, MASSIMILIANO;
2010-01-01

Abstract

We report on the search for 0.1-10 GeV emission from magnetars in 17 months of Fermi Large Area Telescope (LAT) observations. No significant evidence for gamma-ray emission from any of the currently known magnetars is found. The most stringent upper limits to date on their persistent emission in the Fermi energy range are estimated between ~10–12and10–10 erg s–1 cm–2, depending on the source. We also searched for gamma-ray pulsations and possible outbursts, also with no significant detection. The upper limits derived support the presence of a cutoff at an energy below a few MeV in the persistent emission of magnetars. They also show the likely need for a revision of current models of outer-gap emission from strongly magnetized pulsars, which, in some realizations, predict detectable GeV emission from magnetars at flux levels exceeding the upper limits identified here using the Fermi-LAT observations.
2010
Abdo, Aa; Ackermann, M; Ajello, M; Allafort, A; Baldini, Luca; Ballet, J; Barbiellini, G; Baring, Mg; Bastieri, D; Bellazzini, R; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; Bouvier, A; Bregeon, J; Brigida, M; Bruel, P; Burnett, Th; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Cecchi, C; Celik, O; Chaty, S; Chekhtman, A; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Conrad, J; den Hartog, Pr; Dermer, Cd; de Angelis, A; de Palma, F; Dib, R; Dormody, M; Silva, Ede; Drell, Ps; Dubois, R; Dumora, D; Enoto, T; Favuzzi, C; Frailis, M; Fusco, P; Gargano, F; Gehrels, N; Giglietto, N; Giommi, P; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Grenier, Ia; Grondin, Mh; Guiriec, S; Hadasch, D; Hanabata, Y; Harding, Ak; Hays, E; Israel, Gl; Johannesson, G; Johnson, As; Kaspi, Vm; Katagiri, H; Kataoka, J; Knodlseder, J; Kuss, M; Lande, J; Lee, Sh; Lemoine Goumard, M; Longo, F; Loparco, F; Lovellette, Mn; Lubrano, P; Makeev, A; Marelli, M; Mazziotta, Mn; Mcenery, Je; Mehault, J; Michelson, Pf; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Morselli, A; Moskalenko, Iv; Murgia, S; Naumann Godo, M; Nolan, Pl; Nuss, E; Ohsugi, T; Okumura, A; Omodei, N; Orlando, E; Ormes, Jf; Ozaki, M; Paneque, D; Parent, D; Pepe, M; Pesce Rollins, M; Piron, F; Porter, Ta; Raino, S; Rando, R; Razzano, Massimiliano; Rea, N; Reimer, A; Reimer, O; Reposeur, T; Ritz, S; Sadrozinski, Hfw; Parkinson, Pms; Sgro, C; Siskind, Ej; Smith, Da; Spandre, G; Spinelli, P; Strickman, Ms; Takahashi, H; Tanaka, T; Thayer, Jb; Thompson, Dj; Tibaldo, L; Torres, Df; Tosti, G; Tramacere, A; Troja, E; Uchiyama, Y; Usher, Tl; Vandenbroucke, J; Vasileiou, V; Vianello, G; Vitale, V; Waite, Ap; Winer, Bl; Wood, Ks; Yang, Z; Ziegler, M.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/194964
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