GCN Circular 20593
Subject
GRB 170202A: LCO FTN observations
Date
2017-02-03T11:36:23Z (7 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), A. Gomboc
(U. Nova Gorica), C.G. Mundell (U. Bath) on behalf of a large
collaboration report:
We observed Swift GRB 170202A (Racusin et al. GCN 20575) on February 03,
from 10:30 to 10:40 UT (16 hours since the GRB) with the 2-m LCO FTN in
Hawaii with SDSS r and i filters. We detect the optical afterglow with
the following values:
Mid Time Exposure Filter Magnitude (AB)
(hours) (s)
-------------------------------------------------------
16.1 2x120 SDSS-R 21.10 +- 0.15
16.2 2x120 SDSS-I 20.94 +- 0.19
-------------------------------------------------------
as calibrated against nearby SDSS sources.