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The X-Ray Observatory Suzaku
High-sensitivity wide-band X-ray spectroscopy is the key feature of the Suzaku X-ray observatory, launched on 2005 July 10. This paper summarizes the spacecraft, in-orbit performance, operations, and
Iron K Emission Lines in the Energy Spectra of Low-Mass X-Ray Binaries Observed with ASCA
ASCA archive data of 20 low-mass X-ray binaries (LMXBs) were analyzed to study the iron K emission lines. The LMXBs analyzed here include Z sources, atoll sources, dippers, bursters, and ADC
Intense 6.7-keV iron line emission from the Galactic Centre
THE Galactic Centre, although obscured by dust at optical wavelengths, is luminous in higher-energy radiation. Gamma-ray observations suggest that a large number of supernovae or novae, or a single
Orbital Elements of the Binary X-Ray Pulsar GX 301-2
X-ray outbursts from GX 301-2 were observed with Hakucho on two occasions during April and May 1982 and with Tenma in April 1984. Pulse arrival times measured with Hakucho were combined with those
Discovery of a prominent cyclotron absorption feature from the transient X-ray pulsar X0331+53
A remarkable absorption feature at 28.5 keV, attributable to electron cyclotron resonance, has been discovered in the 1.9-60-keV X-ray spectrum of the recurrent transient X-ray pulsar X0331 + 53. The
X-ray spectral study of the photoionized stellar wind in Vela X-1
We present results from quantitative modeling and spectral analysis of the high-mass X-ray binary system Vela X-1 obtained with the Chandra HETGS. The spectra exhibit emission lines from H- and
Cyclotron Resonance Effects in Two Binary X-Ray Pulsars and the Evolution of Neutron Star Magnetic Fields
The Ginga X-ray spectra of the two binary X-ray pulsars, 4U 1907+09 and Vela X-1, were analyzed for effects due to electron cyclotron resonance. For this purpose, a new continuum spectral model,
ASCA Observations of the Supernova Remnant IC 443: Thermal Structure and Detection of Overionized Plasma
We present the results of X-ray spatial and spectral studies of the "mixed-morphology" supernova remnant IC 443 using ASCA. IC 443 has a center-filled image in the X-ray band, contrasting with the
Detection of Absorption-Line Features in the X-Ray Spectra of the Galactic Superluminal Source GRO J1655–40
We report the detection of iron K-absorption lines in the energy spectra of the superluminal jet source GRO J1655-40. We observed the source with ASCA on four occasions from 1994 through 1996.
Ginga observations of Centaurus X-3
Attention is given to a series of observations of Centaurus X-3 made with Ginga on March 22-24, 1989, over a complete orbital cycle. The data set includes a preeclipse dip, the eclipse ingress and