Unusually rapid variability of the GRB000301C optical afterglow

Details Unusually rapid variability of the GRB000301C optical afterglow Unusually rapid variability of the GRB000301C optical afterglow

2000-04-13

arxiv.org/abs/astro-ph/0004186v2

Astronomy and Astrophysics

Astrophysics

5 pages, Latex, 2 PostScript figures, references added, accepted by Astronomy and Astrophysics Letters

Scientific paper

We present BVRI light curves of the afterglow of GRB000301C, one of the brightest ever detected at a day time scale interval after GRB trigger. The monitoring started 1.5 days after the GRB and ended one month later. Inspection of the extremely well sampled R band light curve and comparison with BVI data has revealed a complex behavior, with a long term flux decrease and various short time scale features superimposed. These are uncommon among other observed afterglows, and might trace either intrinsic variability within the relativistic shock (re-acceleration and re-energization) or inhomogeneities in the medium in which the shock propagates.

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