GCN Circular 22214
Subject
GRB 171209A: LCO 1-m telescope observations
Date
2017-12-09T18:11:27Z (6 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell (U. Bath),
A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU) on behalf of a large
collaboration report:
We observed Swift GRB171209A (LaPorte et al. GCN 22213) on December 9,
16:25 UT (1.65 hours post burst) with one of the 1-m LCO telescopes in
Siding Springs in the SDSS ri filters. We detect the UVOT candidate,
which is not visible in archival Pan-STARRS images, with the following
magnitudes:
Mid Time�������� Exposure�������������� Filter�������� Magnitude (AB)
(hr)�������������������� (s)
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1.69������������������ 2x120������������������ SDSS-R������������ 18.2 +- 0.3
1.78������������������ 2x120������������������ SDSS-I������������ 17.8 +- 0.3
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as calibrated against nearby Pan-STARRS objects. Due to the vicinity of
(~4") of a bright object, our estimated magnitudes are to be taken
cautiously.