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Search for gamma-ray emission from magnetars with the Fermi Large Area Telescope

A.A. Abdo Markus Ackermann Marco Ajello A. Allafort Luca Baldini Jean Ballet 1 Guido Barbiellini M. G. Baring D. Bastieri R. Bellazzini R. D. Blandford E. D. Bloom E. Bonamente A. W. Borgland A. Bouvier J. Bregeon M. Brigida Pascal Bruel 2 T. H. Burnett G. A. Caliandro R. A. Cameron P. A. Caraveo C. Cecchi Ö. Çelik S. Chaty 1 A. Chekhtman C. C. Cheung J. Chiang S. Ciprini R. Claus J. Conrad P. R. den Hartog C. D. Dermer A. de Angelis F. de Palma R. Dib M. Dormody E. Do Couto E Silva P. S. Drell R. Dubois D. Dumora 3 T. Enoto C. Favuzzi M. Frailis P. Fusco F. Gargano N. Gehrels N. Giglietto P. Giommi F. Giordano M. Giroletti T. Glanzman G. Godfrey I. A. Grenier 1 M.-H. Grondin 3 S. Guiriec 4 D. Hadasch Y. Hanabata A. K. Harding E. Hays G. L. Israel G. Jóhannesson A. S. Johnson V. M. Kaspi H. Katagiri J. Kataoka J. Knödlseder 5 M. Kuss J. Lande S.-H. Lee M. Lemoine-Goumard 3 F. Longo F. Loparco M. N. Lovellette P. Lubrano A. Makeev M. Marelli M. N. Mazziotta J. E. Mcenery J. Mehault 4 P. F. Michelson T. Mizuno A. A. Moiseev C. Monte M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia M. Naumann-Godo P. L. Nolan E. Nuss 4 T. Ohsugi A. Okumura N. Omodei E. Orlando J. F. Ormes M. Ozaki D. Paneque D. Parent 3 M. Pepe M. Pesce-Rollins F. Piron 4 T.A. Porter S. Rainò R. Rando M. Razzano N. Rea A. Reimer O. Reimer T. Reposeur 3 S. Ritz H. F.-W. Sadrozinski P. M. Saz Parkinson C. Sgrò E. J. Siskind David Stanley Smith 3 G. Spandre P. Spinelli M. S. Strickman H. Takahashi T. Tanaka J. B. Thayer D. J. Thompson L. Tibaldo 1 D. F. Torres G. Tosti A. Tramacere E. Troja Y. Uchiyama T. L. Usher J. Vandenbroucke V. Vasileiou G. Vianello V. Vitale A. P. Waite B. L. Winer K. S. Wood Z. Yang M. Ziegler
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-LAT energy range are estimated between ~10^{-12}-10^{-10} erg/s/cm2, 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 cut-off 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.
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Submitted on : Monday, April 11, 2011 - 11:26:43 PM
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A.A. Abdo, Markus Ackermann, Marco Ajello, A. Allafort, Luca Baldini, et al.. Search for gamma-ray emission from magnetars with the Fermi Large Area Telescope. The Astrophysical journal letters, Bristol : IOP Publishing, 2010, 725, pp.L73-L78. ⟨10.1088/2041-8205/725/1/L73⟩. ⟨in2p3-00585162⟩

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