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.
Autori interni: | |
Autori: | Abdo AA; Ackermann M; Ajello M; Allafort A; Baldini L; 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 M; 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 |
Titolo: | SEARCH FOR GAMMA-RAY EMISSION FROM MAGNETARS WITH THE FERMI LARGE AREA TELESCOPE |
Anno del prodotto: | 2010 |
Digital Object Identifier (DOI): | 10.1088/2041-8205/725/1/L73 |
Appare nelle tipologie: | 1.1 Articolo in rivista |