Early observations of the Afterglow of GRB000301c

Details Early observations of the Afterglow of GRB000301c Early observations of the Afterglow of GRB000301c

2000-10-16

arxiv.org/abs/astro-ph/0010308v1

Astronomy and Astrophysics

Astrophysics

14 pages, 2 postscript figures, Accepted for Publication in ApJ Letters

Scientific paper

10.1086/317878

We report multiband observations of the Optical Transient (OT) associated with GRB000301c carried out between 2--4 March 2000 using the 2.34-m Vainu Bappu Telescope (VBT) at Kavalur, India. When combined with other reported data, the initial decline in the R-band magnitude with log ($t-t_0$), the time since the burst is fit with a slope $\alpha_{1}$ = -0.70 $\pm$ 0.07 which steepens after about 6.0 days to a slope of $\alpha_{2}$ = -2.44 $\pm$ 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.

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