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Fermi Large Area Telescope observations of PSR J1836+5925

A. A. Abdo Markus Ackermann Marco Ajello W. B. Atwood Luca Baldini Jean Ballet 1 Guido Barbiellini M. G. Baring D. Bastieri K. Bechtol A. Belfiore R. Bellazzini 1 B. Berenji R. D. Blandford E. D. Bloom E. Bonamente A. W. Borgland J. Bregeon A. Brez M. Brigida Pascal Bruel 2 T. H. Burnett S. Buson G. A. Caliandro R. A. Cameron F. Camilo P. A. Caraveo S. Carrigan J. M. Casandjian 1 C. Cecchi O. Celik E. Charles 1 A. Chekhtman C. C. Cheung J. Chiang S. Ciprini R. Claus J. Cohen-Tanugi 3 J. Conrad A. de Angelis A. de Luca F. de Palma S. W. Digel M. Dormody E. Do Couto E Silva P. S. Drell R. Dubois D. Dumora 4 Y. Edmonds C. Farnier 3 C. Favuzzi S. J. Fegan 2 W. B. Focke P. Fortin 2 M. Frailis Y. Fukazawa S. Funk P. Fusco F. Gargano D. Gasparrini N. Gehrels S. Germani G. Giavitto N. Giglietto F. Giordano T. Glanzman G. Godfrey I. A. Grenier 1 M.-H. Grondin 4 J. E. Grove L. Guillemot 4 S. Guiriec 3 C. Gwon D. Hadasch A. K. Harding E. Hays D. Horan 2 R. E. Hughes M. S. Jackson G. Johannesson A. S. Johnson R. P. Johnson T. J. Johnson W. N. Johnson T. Kamae Y. Kanai H. Katagiri J. Kataoka N. Kawai M. Kerr J. Knodlseder 5 M. Kuss J. Lande L. Latronico M. Lemoine-Goumard 4 F. Longo F. Loparco B. Lott 4 M. N. Lovellette P. Lubrano G. M. Madejski A. Makeev M. Marelli M. N. Mazziotta J. E. Mcenery C. Meurer P. F. Michelson W. Mitthumsiri T. Mizuno A. A. Moiseev C. Monte M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia P. L. Nolan J. P. Norris E. Nuss 3 T. Ohsugi N. Omodei E. Orlando J. F. Ormes D. Paneque J. H. Panetta D. Parent 4 V. Pelassa 3 M. Pepe M. Pesce-Rollins M. Pierbattista 1 F. Piron 3 T.A. Porter S. Raino R. Rando S. M. Ransom P. S. Ray M. Razzano N. Rea A. Reimer O. Reimer T. Reposeur 4 L. S. Rochester A. Y. Rodriguez R. W. Romani M. Roth F. Ryde H. F.-W. Sadrozinski A. Sander P. M. Saz Parkinson J. D. Scargle 1 C. Sgr'O E. J. Siskind David Stanley Smith 4 P. D. Smith G. Spandre P. Spinelli M. S. Strickman D. J. Suson H. Takahashi T. Tanaka J. B. Thayer J. G. Thayer D. J. Thompson S. E. Thorsett L. Tibaldo 1 O. Tibolla D. F. Torres G. Tosti A. Tramacere T. L. Usher A. van Etten V. Vasileiou C. Venter N. Vilchez 5 V. Vitale A. P. Waite P. Wang K. Watters B. L. Winer M. T. Wolff K. S. Wood T. Ylinen M. Ziegler
Abstract : The discovery of the gamma-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area Telescope (LAT). Sitting 25 degrees off the Galactic plane, PSR J1836+5925 is a 173 ms pulsar with a characteristic age of 1.8 million years, a spindown luminosity of 1.1$\times10^{34}$ erg s$^{-1}$, and a large off-peak emission component, making it quite unusual among the known gamma-ray pulsar population. We present an analysis of one year of LAT data, including an updated timing solution, detailed spectral results and a long-term light curve showing no indication of variability. No evidence for a surrounding pulsar wind nebula is seen and the spectral characteristics of the off-peak emission indicate it is likely magnetospheric. Analysis of recent XMM observations of the X-ray counterpart yields a detailed characterization of its spectrum, which, like Geminga, is consistent with that of a neutron star showing evidence for both magnetospheric and thermal emission.
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Submitted on : Thursday, April 22, 2010 - 3:18:05 PM
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A. A. Abdo, Markus Ackermann, Marco Ajello, W. B. Atwood, Luca Baldini, et al.. Fermi Large Area Telescope observations of PSR J1836+5925. The Astrophysical Journal, American Astronomical Society, 2010, 712, pp.1209-1218. ⟨10.1088/0004-637X/712/2/1209⟩. ⟨in2p3-00475654⟩

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