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

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 545卷 / 02期

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

页码：L77 / L80

页数：4

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