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GCN Circular 29085

GRB 201216C: Liverpool Telescope First Hour Observations
2020-12-18T14:51:28Z (3 years ago)
Manisha Shrestha at Liverpool John Moores U <>
M. Shrestha (Liverpool JMU), A. Melandri (INAF), R. Smith (LJMU) , I.A. Steele (LJMU), S. Kobayashi (LJMU), C. Mundell (Univ. Bath), A. Gomboc (Univ. Nova Gorica), C. Guidorzi (Univ. Ferrara)  report on behalf of a wider collaboration:

We observed the field of Swift GRB 201216C (GCN 29061) with the 2.0m Liverpool Telescope (LT), La Palma on 2020 Dec 16 starting at 23:10:29.13 UT using the IO:O optical camera in the r� bands.  Data was calibrated with respect to nearby APASS secondary standard stars.

We confirm the optical counterpart reported by Swift UVOT and VLT (GCN 29066).

At T=177 seconds after the BAT trigger time, we measure r� = 18.38. The r� band light curve made along with VLT (GCN 29066) data point and inferred data from FRAM-ORM (GCN 29070) show a power law decay in flux vs time with alpha = 1. From the light curve, LT observations seem to be around the peak of afterglow.

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