Decomposition of the X-ray waveform of soft gamma-ray repeaters during giant flares  

作　　者：XING Yi & YU WenFei Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第S1期249-251,共3页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10773023 and 10833002);the One Hundred Talents Project of the Chinese Academy of Sciences,the Shanghai Pujiang Program (Grant No. 08PJ14111);the National Basic Research Program of China (Grant No. 2009CB824800);the Starting Funds at the Shanghai Astro-nomical Observatory

摘　　要：We have analyzed the observations of SGR 1806-20 and SGR 1900+14 during giant flares made with the Rossi X-ray Timing Explorer.We have studied the pulsating tail after the initial spike and decomposed the pulse waveform into separate components of sub-pulses.We found evidence for phase shifts of those sub-pulses.This is probably due to rapid geometrical changes in the magnetic field of the neutron star during giant flares.The phase shifts could be used to constrain the geometry of the magnetic field.We have analyzed the observations of SGR 1806-20 and SGR 1900+14 during giant flares made with the Rossi X-ray Timing Explorer.We have studied the pulsating tail after the initial spike and decomposed the pulse waveform into separate components of sub-pulses.We found evidence for phase shifts of those sub-pulses.This is probably due to rapid geometrical changes in the magnetic field of the neutron star during giant flares.The phase shifts could be used to constrain the geometry of the magnetic field.

关 键 词：SOFT gamma-repeaters giant FLARE WAVEFORM DECOMPOSITION 

分 类 号：P172.2[天文地球—天文学]