[vsnet-grb-info 2890] GRB 060210: optical evolution

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4727
SUBJECT: GRB 060210: optical evolution
DATE:    06/02/10 07:12:35 GMT
FROM:    Weidong Li at UC Berkeley KAIT/LOSS  <weidong at astron.berkeley.edu>

W. Li, University of California, Berkeley, on behalf of the 
KAIT GRB team, report: 

We report further analysis of the KAIT observations of 
GRB 060210 between 1 to 48 minutes after the burst. 
The optical afterglow showed an interesting evolution:
it was nearly flat (with unfiltered mag of about 18.1)
between t = 1 to 5 minutes, brightened to mag 17.7 
at t = 9 minutes, then began a fast power-law decline
between t = 10 to 48 minutes with an index of -1.05 +/- 0.05. 
A light curve for the optical afterglow is at 
http://astron.berkeley.edu/~weidong/grb060210.lc.gif

The figure showed both the unfiltered and I-band light
curve of the OA, both calibrated to USNO B1.0 red magnitudes.

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