FERMI LARGE AREA TELESCOPE OBSERVATIONS OF PSR J1836+5925

The discovery of the γ-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° 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 × 1034 erg s−1, and a large off-peak (OP) emission component, making it quite unusual among the known γ-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 OP emission indicate it is likely magnetospheric. Analysis of recent XMM-Newton 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.

D. Thompson | J. Chiang | J. Grove | R. Hughes | M. Frailis | A. Moiseev | J. Scargle | N. Gehrels | M. Razzano | R. Blandford | K. Bechtol | M. Ackermann | S. Digel | A. Morselli | V. Vitale | N. Kawai | T. Ohsugi | B. Lott | R. Romani | P. Drell | G. Barbiellini | A. Angelis | H. Sadrozinski | B. Winer | S. Ransom | F. Camilo | J. Mcenery | R. Johnson | N. Giglietto | P. Spinelli | R. Bellazzini | A. Brez | J. Ormes | C. Cecchi | K. Wood | T. Kamae | P. Bruel | M. Roth | D. Paneque | S. Ciprini | D. Gasparrini | N. Omodei | A. V. Etten | C. Venter | Y. Fukazawa | T. Mizuno | G. Tosti | F. Longo | J. Ballet | M. Baring | A. Sander | T. Burnett | E. Bloom | G. Godfrey | E. Bonamente | L. Latronico | G. Spandre | A. Chekhtman | P. Lubrano | A. Borgland | J. Panetta | R. Claus | T. Glanzman | N. Rea | S. Fegan | D. Horan | H. Katagiri | J. Kataoka | I. Grenier | P. Caraveo | S. Murgia | J. Cohen-Tanugi | J. Thayer | C. Gwon | J. Thayer | F. Palma | W. Atwood | C. Farnier | M. Pepe | G. Madejski | Takaaki Tanaka | A. Johnson | A. Waite | M. Ziegler | E. Silva | S. Funk | L. Guillemot | M. Wolff | P. Ray | R. Rando | M. Ajello | D. Bastieri | S. Buson | R. Cameron | A. Luca | R. Dubois | W. Focke | G. Giavitto | D. Hadasch | T. Johnson | J. Knödlseder | J. Lande | V. Pelassa | O. Reimer | F. Ryde | L. Tibaldo | O. Tibolla | D. Torres | T. Usher | A. Harding | L. Baldini | J. Bregeon | M. Jackson | M. Kuss | C. Sgro’ | M. Strickman | S. Guiriec | M. Brigida | G. Caliandro | C. Favuzzi | F. Gargano | S. Germani | F. Giordano | F. Loparco | M. Mazziotta | C. Monte | M. Pesce-Rollins | S. Rainó | F. Piron | P. Nolan | P. Michelson | M. Kerr | M. Lemoine-Goumard | P. Fortin | O. Celik | A. Abdo | D. Parent | P. Parkinson | J. Casandjian | B. Berenji | E. Charles | P. Fusco | E. Hays | G. Jóhannesson | M. Lovellette | W. Mitthumsiri | I. Moskalenko | E. Nuss | E. Orlando | T. Porter | T. Reposeur | E. Siskind | D. Suson | M. Grondin | S. Thorsett | K. Watters | M. Pierbattista | A. Belfiore | V. Vasileiou | M. Monzani | S. Carrigan | D. Dumora | W. Johnson | A. Makeev | J. Norris | D. Smith | P. Smith | A. Tramacere | N. Vilchez | Pengfei Wang | T. Ylinen | L. Rochester | M. Marelli | C. Meurer | C. C. Cheung | A. Y. Rodríguez | M. Dormody | Y. Kanai | Y. Edmonds | H. Takahashi | A. Reimer | J. Conrad | H. Takahashi | A. Rodríguez | M. Roth | W. Johnson | E. Charles | S. Rainò | D. Thompson

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