GCN Circular 22197
Subject
GRB 171205A: LCO 1-m telescope observations
Date
2017-12-07T13:36:16Z (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 GRB171205A (D'Elia et al. GCN 22177) on December 7,
07:21 UT (2.0 days post burst) with one of the 1-m LCO telescopes in
Cerro Tololo in the SDSS ri filters. We clearly detect the optical
afterglow (Izzo et al. GCN 22180; Emery et al. GCN 22181; Butler et al.
GCN 22182; Mao et al. GCN 22186; Choi et al. GCN 22188; Melandri et al.
GCN 22189; Steeghs et al. GCN 22190; Cobb et al. GCN 22192; Volnova et
al. GCN 22193) with the following magnitudes:
Mid Time���� Exposure������ Filter������ Magnitude (AB)
(days)������� (s)
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2.0��������� 5x120��������� SDSS-R������� 19.43 +- 0.10
2.0��������� 5x120��������� SDSS-I������� 19.19 +- 0.10
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as calibrated against nearby Pan-STARRS objects.