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GCN Circular 28986

Subject
GRB 201203A: FRAM-Auger optical limit
Date
2020-12-03T08:09:11Z (3 years ago)
From
Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>
Martin Jelinek, Jan Strobl (ASU CAS Ondrejov, CZ),
Martin Masek, Petr Janecek, Sergey Karpov, Jakub
Jurysek, Jan Ebr, Ronan Cunniffe, Petr Travnicek and
Michael Prouza (Institute of Physics, Prague, CZ)

report:

The 30 cm robotic telescope FRAM-Auger in Malargue
(Argentina) reacted robotically to the Swift/BAT alert
of GRB201203A (Dichiara et al., GCNC 28985), starting
with a series of 20 s unfiltered images at 06:54:04 UT,
i.e. 97 s post trigger.

We do not detect any new or strongly variable source at
or around the reported gamma-ray errorbox in single
frames or a combined 20 x 20 s image taken between 1.5
min and 12.5 min after the initial trigger. The
combined exposure has a limiting magnitude r'(AB) ~
17, as calibrated against the Atlas Catalogue.
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