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Very Early Multicolor Observations of the Plateau Phase of the GRB 041006 Afterglow

Y. UrataRIKEN (Institute of Physical and Chemical Research), Saitama, JapanK. Y. HuangInstitute of Astronomy, National Central University, TaiwanY. QiuNational Astronomical Observatories, Chinese Academy of Sciences, Beijing, ChinaJialiang HuNational Astronomical Observatories, Chinese Academy of Sciences, Beijing, ChinaP. H. KuoInstitute of Astronomy, National Central University, TaiwanToru TamagawaRIKEN (Institute of Physical and Chemical Research), Saitama, JapanWing‐Huen IpInstitute of Astronomy, National Central University, TaiwanDaisuke KinoshitaInstitute of Astronomy, National Central University, TaiwanH. FukushiInstitute of Astronomy, University of Tokyo, JapanM. IsogaiThe University of TokyoTakashi MiyataKiso Observatory, Institute of Astronomy, University of Tokyo, Nagano, JapanY. NakadaThe University of TokyoTsutomu AokiKiso Observatory, Institute of Astronomy, University of Tokyo, Nagano, JapanTakao SoyanoKiso Observatory, Institute of Astronomy, University of Tokyo, Nagano, JapanKen’ichi TarusawaKiso Observatory, Institute of Astronomy, University of Tokyo, Nagano, JapanHiroyuki MitoInstitute of Astronomy, University of Tokyo, JapanK. OndaDepartment of Physics, Saitama University, Saitama, JapanM. IbrahimovUlugh Beg Astronomical Institute, Tashkent, UzbekistanA. PozanenkoSpace Research Institute, Moscow, RussiaKazuo MakishimaRIKEN (Institute of Physical and Chemical Research), Saitama, Japan

The Astrophysical Journaljournal2007en

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Annotatsiya

Observations of the optical afterglow of GRB 041006 with the Kiso Observatory 1.05 m Schmidt telescope, the Lulin Observatory 1.0 m telescope and the Xinglong Observatory 0.6 m telescope. Three-bands (B, V and R) of photometric data points were obtained on 2004 October 6, 0.025-0.329 days after the burst. These very early multi band light curves imply the existence of a color dependent plateau phase. The B-band light curve shows a clear plateau at around 0.03 days after the burst. The R band light curve shows the hint of a plateau, or a possible slope change, at around 0.1 days after the burst. The overall behavior of these multi-band light curves may be interpreted in terms of the sum of two separate components, one showing a monotonic decay the other exhibiting a rising and a falling phase, as described by the standard afterglow model.

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Mavzular

Gamma-ray bursts and supernovae Astro and Planetary Science Stellar, planetary, and galactic studies

Identifikatorlar

DOI: 10.1086/512011

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