@inproceedings{oai:jaxa.repo.nii.ac.jp:00005045,
 author = {吉田, 鉄生 and 海老沢, 研 and 松下, 恭子 and Yoshida, Tessei and Ebisawa, Ken and Matsushita, Kyoko},
 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 the X-ray study of five brightest ultraluminous X-ray sources (ULXs) in the interacting galaxy system NGC4490 and NGC4485 using the archived data from three Chandra and one XMMNewton observations. To investigate spectral variations of these ULXs, we plotted their disk luminosities against the innermost disk temperatures estimated via the multi-color disk model. We found that the observed spectral variations are classified into two types; one indicating a power-law relation between the luminosity and the innermost disk temperature and the other without such a relation. The latter type shows flux changes more than an order. We discuss spectral state changes for individual sources., 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: AA0064574113, レポート番号: JAXA-SP-09-008E},
 pages = {300--301},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Ultraluminous X-ray Sources in the Interacting Galaxy System NGC4490 and NGC4485},
 volume = {JAXA-SP-09-008E},
 year = {2010}
}