Early observations of the afterglow of GRB 000301c

被引:11
作者
Bhargavi, SG
Cowsik, R
机构
[1] Indian Inst Astrophys, Bangalore 560034, Karnataka, India
[2] Tata Inst Fundamental Res, Mumbai 400005, India
关键词
cosmology : observations; gamma rays : bursts;
D O I
10.1086/317878
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report multiband observations of the optical transient associated with GRB 000301c carried out 2000 March 2-4 using the 2.34 m Vainu Bappu Telescope at Kavalur, India. When combined with other reported data, the initial decline in the R-band magnitude with, the time since the burst is fitted with a slope of log (t - t(0)), the time since the burst is fitted with a slope of alpha (1) = -0.70 +/- 0.07, which steepens after about 6.0 days to a slope of alpha (2) = -2.44 +/- 0.29. This change in slope does not occur smoothly, but there is an indication for a bimodal distribution. The available measurements of the evolution of (B-R) color do not show any discernible evolution in the first 12 days.
引用
收藏
页码:L77 / L80
页数:4
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