Optical follow-up of GRB970508

Bibcode
1998AIPC..428..499G
DOI
10.1063/1.55471
Groot, Paul J.; Galama, Titus J.; van Paradijs, Jan; Kouveliotou, Chryssa; Wijers, Ralph; Centurion, Miriam; Smith, Paul; Mackay, Chris; Smartt, Stephen; Benn, Chris
Bibliographical reference

Fourth Huntsville gamma-ray burst symposium. AIP Conference Proceedings, Volume 428, pp. 499-503 (1998).

Advertised on:
5
1998
Number of authors
10
IAC number of authors
1
Citations
0
Refereed citations
0
Description
We report on the results of optical follow-up observations of the counterpart of GRB970508 between 7 hours and 100 days after the event. Multi-colour U, B, V, Rc and Ic band observations were obtained during the first three consecutive nights. The Rc light curve rises to a maximum 1.8 days after the burst and after this declines with a power law decay, the exponent of which is α=-1.21+/-0.01. Superposed on this power law decay, we detect small amplitude (<0.5 magnitude) variations on timescales as short as half a day. The optical energy distribution can be well represented by a power law, the slope of which became steeper during the rise to maximum light and stayed constant afterwards.
Type
Non-refereed
Gamma-ray sources
Gamma-ray bursts

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