Author(s): A. Abdo A., Ackermann M., Ballet J., Bellazzini R., Bruel P., M. Casandjian J., Charles E., Cohen-Tanugi J., Dumora D., Farnier C., J. Fegan S., Fortin P., A. Grenier I., Grondin M.-H., Guillemot L., Guiriec Sylvain, Horan D., Knodlseder J., Lemoine-Goumard M., Lott B., Nuss E., Parent D., Pelassa V., Pierbattista M., Piron F., Reposeur T., D. Scargle J., A. Smith D., Tibaldo L., Vilchez N.
(Article) Published:
The Astrophysical Journal / The Astrophysical Journal Letters, vol. 712 p.1209-1218 (2010)
Links openAccess full text : 
Ref HAL: in2p3-00475654_v1
Ref Arxiv: 1002.2977
DOI: 10.1088/0004-637X/712/2/1209
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
32 citations
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.
Comments: Accepted to Astrophysical Journal