Suzaku observation of AXP 1E 1841-045 and the future observation in the MAXI era

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Abstract

Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008)

We report results of the Suzaku observation of the anomalous X-ray pulsar (AXP) 1E 1841-045. We obtained the spectrum from 0.4 keV to ca. 70 keV simultaneously. The model consisting of a blackbody and two power-law functions could simulate the spectrum well. We also found that the power-law function at the higher energy can be replaced with a thermal bremsstrahlung. The fact that the hard X-ray emission can be interpreted as a thermal bremsstrahlung would support the theoretical emission model proposed by Thompson & Beloborodov (2005). Emission mechanism of the hard X-ray component can be understood by detecting the variability of the photon index and cutoff energy. In this reason, the MAXI monitoring for magnetars (AXPs and SGRs) are extremely important. The monitoring of the pulse frequency and pulse profiles of magnetars are also important as well as that of the flux. MAXI can detect transient phenomena and trigger the multi-wavelength observation. Especially, near-infrared monitoring observation and correlation study would be able to elucidate the mysterious infrared emission mechanism of magnetars. We estimated the detectability of the magnetars and their pulsation by MAXI using the MAXI simulator.

Physical characteristics: Original contains color illustrations

資料番号: AA0064306024

レポート番号: JAXA-SP-08-014E

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