The decay of optical emission from the γ-ray burst GRB970228

Details The decay of optical emission from the γ-ray burst GRB970228 The decay of optical emission from the γ-ray burst GRB970228

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..428..478g&link_type=abstract

Fourth Huntsville gamma-ray burst symposium. AIP Conference Proceedings, Volume 428, pp. 478-482 (1998).

Physics

6

Gamma-Ray Sources, Gamma-Ray Bursts, Visible

Scientific paper

We present the Rc band light curve of the optical transient (OT) associated with GRB970228, based on re-evaluation of existing photometry. Data obtained until April 1997 suggested a slowing down of the decay of the optical brightness. However, the HST observations in September 1997 show that the light curve of the point source is well represented by a single power law, with a ``dip'', about a week after the burst occured. The exponent of the power law decay is α=-1.10+/-0.04. As the point source weakened it also became redder.

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