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Bin Mode Estimation Methods for Compton Camera Imaging
Shiro Ikeda, Hirokazu Odaka, Makoto Uemura +3
We study the image reconstruction problem of a Compton camera which consists of semiconductor detectors. The image reconstruction is formulated as a statistical estimation problem.…
Short-Term Variability of X-rays from Accreting Neutron Star Vela X-1: II. Monte-Carlo Modeling
Hirokazu Odaka, Dmitry Khangulyan, Yasuyuki T. Tanaka +3
We develop a Monte Carlo Comptonization model for the X-ray spectrum of accretion-powered pulsars. Simple, spherical, thermal Comptonization models give harder spectra for higher o…
Search for a correlation between giant radio pulses and hard X-ray emissions in the Crab pulsar
Ryo Mikami, Toshio Terasawa, Shota Kisaka +12
We present the results of the search for a correlation between giant radio pulses (GRPs) at 1.4 GHz and hard X-rays at 15-75 keV from the Crab pulsar. We made simultaneous ground a…
Short-Term Variability of X-rays from Accreting Neutron Star Vela X-1: I. Suzaku Observations
Hirokazu Odaka, Dmitry Khangulyan, Yasuyuki T. Tanaka +3
We have analyzed the time variability of the wide-band X-ray spectrum of Vela X-1, the brightest wind-fed accreting neutron star, on a short timescale of 2 ks by using {\it Suzaku}…