Soft gamma repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs) are strange X-ray pulsars
\nshowing slow rotations, bright soft X-rays, and recurrent burst activities. Based on accumulating
\nobservational evidence, these pulsars are now thought to be magnetically powered neutron stars,
\nor “magnetars” with an extremely strong magnetic field of 1e+10-11 T. Such a field is by 2-3 orders
\nof magnitudes higher than those of normal neutron stars, and well above the quantum critical field,
\n4.4e+9 T, and sparking an interest not only in pulsar science but also in wide-ranging astrophysics,
\neven in particle physics or nuclear physics. Such a strong field is considered to induce characteristic
\nburst activities and particular X-ray spectra, little is known about how the magnetic energy is dissipated
\nand converted into the radiation. In order to provide an unified characterization of this class,
\nwe performed a comprehensive study of broad-band X-ray spectra, and revealed the spectral
\nevolution correlated with their characteristic age and their magnetic field strength. I will also
\nintroduce recent progress of X-ray observation of these mysterious X-ray sources and the future missions.<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[55],"acf":{"s_now_accepting":true,"s_date_order":"2013-06-26 17:00:00","s_date_end":null,"s_date_text":"","s_text":"Teruaki ENOTO ","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"