Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
Research Institute for Science and Engineering, Waseda University
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS)(JAXA)
KIPAC/Stanford Linear Accelerator Center, Stanford University
Universitat Wurzburg
Landessternwarte, Universitat Heidelberg
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料:
雑誌名(英)
JAXA Special Publication: The Energetic Cosmos; from Suzaku to ASTRO-H
巻
JAXA-SP-09-008E
ページ
28 - 29
発行年
2010-02-26
会議概要（会議名, 開催地, 会期, 主催者等）（英）
The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan
抄録（英）
We observed the TeV blazar 1ES 1218+304 with the X-ray astronomy satellite Suzaku in May 2006. At the beginning of the two-day continuous observation, we detected a large flare in which the 5 - 10 keV flux changed by a factor of approximately 2 on a timescale of 5 x 10(exp 4) s. During the flare, the increase in the hard X-ray flux clearly lagged behind that observed in the soft X-rays, with the maximum lag of 2.3 x 10(exp 4) s observed between the 0.3-1 keV and 5-10 keV bands. Furthermore we discovered that the temporal profile of the flare clearly changes with energy, being more symmetric at higher energies. From the spectral fitting of multi-wavelength data assuming a one-zone, homogeneous synchrotron self-Compton model, we obtain B approximately 0.047 G, emission region size R = 3.0 x 10(exp 16) cm for an appropriate beaming with a Doppler factor of delta = 20. This value of B is in good agreement with an independent estimate through the model fit to the observed time lag ascribing the energy-dependent variability to differential acceleration timescale of relativistic electrons provided that the gyro-factor xi is 10(exp 5).
内容記述（英）
Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science
Suzaku observation of TeV blazar the 1ES 1218+304: clues on particle acceleration in an extreme TeV blazar
64574008.pdf
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