Hisham Anwer Saleh Mohamed <br/><br/>
The global spectral properties of X - ray and gamma - ray bursts from SGR 1806 - 20 /  
 دراسة الخصائص الطيفية العامة لنبضات الأشعة السينية وأشعة جاما المنبعثة من الماجنيتار SGR 1806 - 20 
Hisham Anwer Saleh Mohamed ; Supervised Mohamed Tarek Hussein Zakaria , Tharwat Mahmoud Elsherbini , Alaa Ibrahim Hussein Ibrahim 
 - Cairo :   Hisham Anwer Saleh Mohamed ,   2010 
 - 87 P. :   charts ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physics 
<br/><br/> Magnetars are cosmic sources of high energy radiations that emit short, intense bursts of X - rays and T - rays . Studying the spectral and temporal properties of these bursts allows us to identify the physical mechanism responsible for their emission and to probe the interaction of radiation and matter at extreme conditions of tem-perature, gravity, and magnetic field that cannot be reproduced in laboratories or particle accelerators 
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<br/><br/><label>Subjects--Index Terms: </label>Magnetars  Newtron stons  X - rays and T - rays