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titleSuzaku observation of TeV blazar the 1ES 1218+304: clues on particle acceleration in an extreme TeV blazar
Author(jpn)佐藤, 理江; 片岡, 淳; 高橋, 忠幸
Author(eng)Sato, Rie; Kataoka, Jun; Takahashi, Tadayuki,; Madejski, G. M.; Rugamer, S; Wagner, S. J.
Author Affiliation(jpn)宇宙航空研究開発機構宇宙科学研究本部; 早稲田大学理工学術院総合研究所; 宇宙航空研究開発機構宇宙科学研究本部高エネルギー天文学研究系
Author Affiliation(eng)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
Issue Date2010-02-26
Japan Aerospace Exploration Agency (JAXA)
Publication title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
Start page28
End page29
Publication date2010-02-26
AbstractWe 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).
DescriptionMeeting Information: The 3rd Suzaku international Conference "Energetic Cosmos : from Suzaku to ASTRO-H" (June 29-July 2, 2009. Grand Park Otaru Hotel), Otaru, Hokkaido Japan
Meeting sponsors: The University of Tokyo, The Institute of Physical and Chemical Research, The Japan Society for the Promotion of Science
Keywordsworkshop: proceedings - LaTeX2.09: style file - instructions
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-09-008E

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