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Suzaku View of the Neutron Star in the Dipping Source 4U 182237
Makoto Sasano, Kazuo Makishima, Soki Sakurai +2
The dipping X-ray source 4U 182237 was observed by Suzaku on 2006 Octrober 20 for a net exposure of 37 ks. The source was detected with the XIS at a 1-10 keV flux of 5.5$\times1…
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…
Multi-Wavelength Studies of Spectacular Ram Pressure Stripping of a Galaxy. II. Star Formation in the Tail
Masafumi Yagi, Liyi Gu, Yutaka Fujita +5
With multiband photometric data in public archives, we detected four intracluster star-forming regions in the Virgo cluster. Two of them were at a projected distance of 35 kpc away…
Suzaku Studies of Luminosity-Dependent Changes in the Low-Mass X-ray Binary Aquila X-1
Soki Sakurai, Shunsuke Torii, Hirofumi Noda +7
The neutron-star Low-Mass X-ray Binary Aquila X-1 was observed by Suzaku for seven times, from 2007 September 28 to October 30. The observations successfully traced an outburst dec…
Multi-Wavelength Studies of Spectacular Ram Pressure Stripping of a Galaxy: Discovery of an X-ray Absorption Feature
Liyi Gu, Masafumi Yagi, Kazuhiro Nakazawa +5
We report the detection of an X-ray absorption feature near the galaxy M86 in the Virgo cluster. The absorber has a column density of 2-3 E20 /cm^2, and its position coincides with…
Hardening and termination of long-duration gamma rays detected prior to lightning
H. Tsuchiya, T. Enoto, K. Iwata +10
We report the first observation of 330 MeV prolonged gamma-ray emission that was abruptly terminated by lightning. The gamma-ray detection was made during winter thunderstorms o…