@inproceedings{oai:jaxa.repo.nii.ac.jp:00005003,
 author = {菅原, 泰晴 and 前田, 良知 and 坪井, 陽子 and Sugawara, Yasuharu and Maeda, Yoshitomo and Tsuboi, Yohko and Hamaguchi, Kenji and Corcoran, Michael and Pollock, Andy and Moffat, Anthony and Williams, Peredur and Dougherty, Sean and Pittard, Julian},
 book = {宇宙航空研究開発機構特別資料:, JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H},
 month = {Feb},
 note = {The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan, We report on preliminary results of the Suzaku observations of the W-R binary WR 140 (WC7+O5I), with the aim of understanding the W-R stellar wind as well as the wind-wind collision shocks. Our observations with exposures of 210 ksec in total were made at four different epochs around periastron passage in Jan. 2009. We detected hard X-ray excess in the HXD band. This is the first time that the hard X-ray excess above 10 keV was detected from a W-R binary. Moreover, we found a part of the soft component is not absorbed even by the dense wind. The spectra can be fitted by three different components, with a stationary soft component at kT approximately 0.1 keV, a high temperature component at kT approximately 3 keV and a harder power-low component. The column density at periastron is a factor of 30 higher than that at pre-periastron, which can be explained as self-absorption of the W-R wind. It is found that the emission measure of high temperature component is not proportional to the inverse of the separation of the two stars., Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science, 資料番号: AA0064574071, レポート番号: JAXA-SP-09-008E},
 pages = {198--199},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {X-ray monitoring of the Wolf-Rayet binary WR140 with Suzaku},
 volume = {JAXA-SP-09-008E},
 year = {2010}
}