2004年
Structure in early afterglow light curves: GRB021004 and GRB030329
GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY
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- 巻
- 727
- 号
- 開始ページ
- 320
- 終了ページ
- 323
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- 出版者・発行元
- AMER INST PHYSICS
Observations by our VSNET team successfully detected early afterglows of GRB021004 and GRB030329. The observational picture of GRB afterglows has been changing from the static fading to the fading with recurring variations thanks to these observations. In GRB021004, we first revealed the afterglow light curve similar to 0.05 day (time after the burst). Our observations revealed the existence of a short plateau phase which lasted for about 2 hours from 0.024 to 0.10 d. In GRB030329, our observation detected complicated structures on the power-law fading even in early times of greater than or similar to 0.05 d. As well as large bumps (0.3-0.5 mag) observed until 6 d, two sub-bumps appear to be superimposed on an early bump around 0.4 d. These early observations provides new hints to re-construct a model of GRB afterglows: early afterglow emission of less than or similar to 0.1 d may be affected by the transition through the maximum of forward shock emission. The long-lived, large amplitude variations in GRB030329 indicate that additional energy was supplied for the shock region.
- リンク情報
- ID情報
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- ISSN : 0094-243X
- Web of Science ID : WOS:000224719700066