Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 20901

GRB 170317A: LCO FTN observations
2017-03-18T09:56:26Z (7 years ago)
Cristiano Guidorzi at Ferrara U,Italy <>
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.
Looking for U.S. government information and services? Visit