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Rapid optical and X-ray timing observations of GX 339-4: flux correlations at the onset of a low/hard state
P. Gandhi, K. Makishima, M. Durant +6
We present the discovery of optical/X-ray flux correlations on rapid timescales in the low/hard state of the Galactic black hole GX 339-4. The source had recently emerged from outb…
Suzaku Observations of Tycho's Supernova Remnant
T. Tamagawa, A. Hayato, S. Nakamura +19
Tycho's supernova remnant was observed by the XIS and HXD instruments onboard the Suzaku satellite on 2006 June 26-29 for 92 ks. The spectrum up to 30 keV was well fitted with a tw…
Very early multi-color observations of the plateau phase of GRB 041006 afterglow
Y. Urata, K. Y. Huang, Y. L. Qiu +17
Observations of the optical afterglow of GRB 041006 with the Kiso Observatory 1.05 m Schmidt telescope, the Lulin Observatory 1.0 m telescope and the Xinglong Observatory 0.6 m tel…
In-Orbit Performance of the Hard X-ray Detector on board Suzaku
M. Kokubun, K. Makishima, T. Takahashi +52
The in-orbit performance and calibration of the Hard X-ray Detector (HXD) on board the X-ray astronomy satellite Suzaku are described. Its basic performances, including a wide ener…
Cyclotron resonance energies at a low X-ray luminosity: A0535+262 observed with Suzaku
Y. Terada, T. Mihara, M. Nakajima +28
The binary X-ray pulsar A0535+262 was observed with the Suzaku X-ray observatory, on 2005 September 14 for a net exposure of 22 ksec. The source was in a declining phase of a minor…
Three Spectral States of the Disk X-Ray Emission of the Black-Hole Candidate 4U 1630-47
Yukiko Abe, Yasushi Fukazawa, Aya Kubota +2
We studied a time history of X-ray spectral states of a black-hole candidate, 4U 1630-47, utilizing data from a number of monitoring observations with the Rossi X-Ray Timing Explor…