Unusually rapid variability of the GRB000301C optical afterglow

N. Masetti, C. Bartolini, S. Bernabei, A. Guarnieri, E. Palazzi, E. Pian, A. Piccioni, A.J. Castro-Tirado, J.M.C. Ceron, L. Verdes-Montenegro, R. Sagar, V. Mohan, A.K. Pandey, S.B. Pandey, H. Bock, J. Greiner, S. Benetti, R.A.M.J. Wijers, G.M. Beskin, J. Gorosabel

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Abstract

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 complex behavior, with a long term flux decrease and various short time scale features superimposed. These features 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.
Original languageEnglish
JournalAstronomy and Astrophysics
Volume359
Issue number3
Pages (from-to)L23-L26
ISSN0004-6361
Publication statusPublished - 2000

Keywords

  • gamma rays : bursts

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