113 citations · 246 across the 13 of their papers we have counts for
13 papers
X-ray Fading and Expansion in the "Miniature Supernova Remnant" of GK Persei
D. Takei, J. J. Drake, H. Yamaguchi +3
We report on a second epoch of Chandra X-ray imaging spectroscopy of the spatially-resolved old nova remnant GK Persei. An ACIS-S3 observation of 97.4 ks was conducted in November…
Development and Performance of Kyoto's X-ray Astronomical SOI pixel (SOIPIX) sensor
Takeshi G. Tsuru, Hideaki Matsumura, Ayaki Takeda +18
We have been developing monolithic active pixel sensors, known as Kyoto's X-ray SOIPIXs, based on the CMOS SOI (silicon-on-insulator) technology for next-generation X-ray astronomy…
A magnetic accretion switch in pre-cataclysmic binaries?
Jeremy J. Drake, Cecilia Garraffo, Dai Takei +1
We have investigated the mass accretion rate implied by published surface abundances of Si and C in the white dwarf component of the 3.62 hr period pre-cataclysmic binary and plane…
X-ray Development of the Classical Nova V2672 Ophiuchi with Suzaku
D. Takei, M. Tsujimoto, J. J. Drake +1
We report the Suzaku detection of a rapid flare-like X-ray flux amplification early in the development of the classical nova V2672 Ophiuchi. Two target-of-opportunity ~25 ks X-ray…
X-ray Eclipse Diagnosis of the Evolving Mass Loss in the Recurrent Nova U Scorpii 2010
D. Takei, J. J. Drake, M. Tsujimoto +4
We report the Suzaku detection of the earliest X-ray eclipse seen in the recurrent nova U Scorpii 2010. A target-of-opportunity observation 15 days after the outburst found a 27+/-…
Discovery of X-ray Emission in the Old Classical Nova DK Lacertae
D. Takei, T. Sakamoto, J. J. Drake
We report the discovery of X-ray emission at the position of the old classical nova DK Lacertae using the Swift satellite. Three observations were conducted using the X-ray telesco…
X-ray Study of Rekindled Accretion in the Classical Nova V2491 Cygni
D. Takei, J. -U. Ness, M. Tsujimoto +5
We conducted an X-ray spectroscopic study of the classical nova V2491 Cygni using our target-of-opportunity observation data with the Suzaku and XMM-Newton satellites as well as ar…
Beginning of the Super-Soft Phase of the Classical Nova V2491 Cygni
D. Takei, J. -U. Ness
We present the results of soft X-ray studies of the classical nova V2491 Cygni using the Suzaku observatory. On day 29 after outburst, a soft X-ray component with a peak at ~0.5 ke…
Swift X-ray and UV monitoring of the Classical Nova V458 Vul (Nova Vul 2007)
J. -U. Ness, J. J. Drake, A. P. Beardmore +18
We describe the highly variable X-ray and UV emission of V458 Vul (Nova Vul 2007), observed by Swift between 1 and 422 days after outburst. Initially bright only in the UV, V458 Vu…
X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku
Masahiro Tsujimoto, Dai Takei, Jeremy J. Drake +2
We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ra…
New CTI Correction Method for the Spaced-Row Charge Injection of the Suzaku X-Ray Imaging Spectrometer
Hideki Uchiyama, Midori Ozawa, Hironori Matsumoto +21
The charge transfer inefficiency (CTI) of the X-ray CCDs on board the Suzaku satellite (X-ray Imaging Spectrometers; XIS) has increased since the launch due to radiation damage, an…
Suzaku Observation of AXP 1E 1841-045 in SNR Kes 73
M. Morii, S. Kitamoto, N. Shibazaki +7
Anomalous X-ray pulsars (AXPs) are thought to be magnetars, which are neutron stars with ultra strong magnetic field of -- G. Their energy spectra below 10…
Detection of a Rare Supersoft Outburst Event during a Suzaku Observation of 1E0102.2-7219
D. Takei, M. Tsujimoto, S. Kitamoto +4
We report the detection of a transient X-ray source toward the Small Magellanic Cloud (SMC) using the X-ray Imaging Spectrometer (XIS) onboard the Suzaku telescope. The source was…