首页 | 本学科首页   官方微博 | 高级检索  
     


X-ray variability of the pulsar Vela X-1 as observed with ART-P/Granat
Authors:A. A. Lutovinov  S. A. Grebenev  M. N. Pavlinsky  R. A. Sunyaev
Affiliation:(1) Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117810, Russia;(2) Max-Planck-Institut fuer Astrophysik, Karl Schwarzschild Strasse 1, 86740 Garching bei Muenchen, Germany
Abstract:Observations of the X-ray pulsar Vela X-1 with the ART-P telescope onboard the Granat Observatory are presented. Variability on a time scale of several thousand seconds was detected; intensity variations are shown to be accompanied by changes in the source’s spectrum. The hardness was also found to be highly variable on a scale of one pulsation period. The source’s spectrum exhibits an absorption feature at energy ~7 keV, which is apparently attributable to cyclotron scattering/absorption in the neutron-star magnetic field. Weak persistent emission was detected during an X-ray eclipse, which probably resulted from the scattering of pulsar emission in the stellar wind from an optical star.
Keywords:neutron stars  pulsars  X-ray sources
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号