GCN Circular 20901
Subject
GRB 170317A: LCO FTN observations
Date
2017-03-18T09:56:26Z (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 170317A (LaPorte et al. GCN 20885) on March 18,
06:01 UT (0.84 days since the GRB) with the 2-m LCO Faulkes Telescope
North with SDSS r and i filters. We marginally detect the optical
afterglow (LaPorte et al.; Mazaeva et al. GCN 20886, 20893; Xin et al.
GCN 20888; Mao et al. GCN 20889, 20890; Kuin et al. GCN 20894) in the r
filter with the following values:
Mid Time Exposure Filter Magnitude (AB)
(days) (s)
-------------------------------------------------------
0.87 10x120 SDSS-R 22.9 +- 0.3
0.88 10x120 SDSS-I > 22.0
-------------------------------------------------------
as calibrated against nearby PanSTARRS-1 DR1 objects.