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Study of very early phase GRB afterglows with MITSuME

Published online by Cambridge University Press:  05 September 2012


Yoshihiko Saito
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Yoichi Yatsu
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Hideya Nakajima
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Nobuyuki Kawai
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Katsuaki Asano
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Yu Aoki
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Mayumi Hayashi
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Seongdeng Song
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Kosuke Kawakami
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Kazuki Tokoyoda
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Takahiro Enomoto
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Ryuichi Usui
Affiliation:
Dept. of Physics, Tokyo Institute of Technology, 2-12-1, Oookayama, Meguro, Tokyo, 152-8551, Japan email: saitoys@hp.phys.titech.ac.jp
Daisuke Kuroda
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232, Japan
Kenshi Yanagisawa
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232, Japan
Hiroyasu Shimizu
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232, Japan
Hiroyuki Toda
Affiliation:
Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Okayama 719-0232, Japan
Shogo Nagayama
Affiliation:
National Astronomical Observatory of Japan, 2-21-1, Ohsawa, Mitaka, Tokyo, 181-8588, Japan
Hidekazu Hanayama
Affiliation:
Ishigaki Astronomical Observatory, National Astronomical Observatory of Japan, 1024-1, Arakawa, Ishigaki, Okinawa, 907-0024, Japan
Michitoshi Yoshida
Affiliation:
Hiroshima Astrophysical Science Center, Hiroshima University 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
Koji Ohta
Affiliation:
Dept. of Astronomy, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto, 606-8502, Japan
Corresponding

Abstract

We review the results of very early phase optical follow-up observations of recent gamma-ray bursts (GRBs) with the multi-color optical telescopes “MITSuME”. The MITSuME telescopes were designed to perform “real time” and “automatic” follow-up observations prompted by the GCN alerts via the Internet. The rapidly slewing equatorial mounts allow MITSuME to start photometric observations within 100 seconds after the trigger for several GRBs. In particular, we detected a brightening just after the trigger for two GRBs. These phenomena could be interpreted as the “on-set” of afterglow. In this paper we summarize these optical observations with a brief interpretation.


Type
Poster Papers
Copyright
Copyright © International Astronomical Union 2012

References

Antonelli, L. A., D'Avanzo, P., Perna, R., et al. 2009, A&A, 507L, 45Google Scholar
Racusin, J. L., Karpov, S. V., Sokolowski, M., et al. 2008, Nature, 455, 183CrossRefGoogle Scholar
Xin, L., Liang, E., Wei, J., et al. 2011, MNRAS 410 27CrossRefGoogle Scholar

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