@inproceedings{oai:jaxa.repo.nii.ac.jp:00004941,
 author = {瀬田, 裕美 and 磯部, 直樹 and 田代, 信 and 中西, 康一郎 and 笹田, 真人 and 島尻, 芳人 and 植村, 誠 and Seta, Hiromi and Isobe, Naoki and Tashiro, Makoto S. and Nakanishi, Kouichiro and Sasada, Mahito and Shimajiri, Yoshito and Uemura, Makoto and Hayashida, Masaaki and Lindfors, Elina and MAGIC, collaboration},
 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, Suzaku observations of the blazar OJ 287 were performed in a quiescent and a flaring state in 2007. The X-ray spectra of the source were well described with single power-law models in both exposures. In the flaring state, the spectrum was harder with significant hard X-ray signals were detected up to approximately 27 keV, and the X-ray flux density was a factor of two higher, compared with that of the quiescent state. In cooperation with the Suzaku, simultaneous radio, optical, and very-high-energy gamma-ray observations were performed with the Nobeyama Millimeter Array, the KANATA telescope, and the MAGIC telescope, respectively. The obtained spectral energy distribution of OJ 287 indicated that the X-ray spectrum was dominated by inverse Compton radiation in both observations, while the synchrotron component exhibited a spectral cutoff around the optical frequency. According to a simple synchrotron self-Compton model, it is estimated that the change of the spectral energy distribution was due to an increase in the energy density of electrons with small changes of both the magnetic field strength and the maximum Lorentz factor of electrons., 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: AA0064574009, レポート番号: JAXA-SP-09-008E},
 pages = {30--31},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Suzaku and multi-wavelength observations of a super massive binary black hole candidate, OJ 287},
 volume = {JAXA-SP-09-008E},
 year = {2010}
}