62 articles – 637 Notices  [english version]
 HAL : in2p3-00475654, version 1
 arXiv : 1002.2977
 Astrophysical Journal 712 (2010) 1209-1218
 Fermi Large Area Telescope observations of PSR J1836+5925
 Fermi-LAT Collaboration(s)
 (01/04/2010)
 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.
 Thème(s) : Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
 Mot(s)-clé(s) : gamma rays: general – pulsars: general – pulsars: individual (PSR J1836+5925)
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1002.2977
 in2p3-00475654, version 1 http://hal.in2p3.fr/in2p3-00475654 oai:hal.in2p3.fr:in2p3-00475654 Contributeur : Virginie Mas <> Déposé pour le compte de : David Smith <> Soumis le : Jeudi 22 Avril 2010, 15:18:05 Dernière modification le : Lundi 3 Mai 2010, 13:50:12