GCN Circular 20579
Subject
GRB 170202A: LCO Sutherland observations
Event
Date
2017-02-02T22:32:33Z (9 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 02,
from 21:19 UT (2.8 hours since the GRB) with 1-m LCO telescope units in
Sutherland with SDSS r and i filters. We detect the optical afterglow
(Racusin et al. GCN 20575; Xi et al. GCN 20576; Lipunov et al. GCN
20578) at the Swift-UVOT position with the following values:
Mid Time Exposure Filter Magnitude (AB)
(hours) (s)
-------------------------------------------------------
2.9 4x120 SDSS-R 19.65 +- 0.15
3.0 4x120 SDSS-I 19.32 +- 0.18
-------------------------------------------------------
as calibrated against nearby SDSS sources.