GCN Circular 26653
Subject
GRB 191228A: FRAM-ORM optical limit
Date
2020-01-07T11:00:43Z (4 years ago)
From
Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>
Martin Jelinek (ASU CAS Ondrejov, CZ), Sergey Karpov, Martin
Masek, Petr Janecek, Jakub Jurysek, Jan Ebr, Ronan Cunniffe,
Petr Travnicek, Michael Prouza (Institute of Physics, Prague,
CZ) and Jan Strobl (ASU CAS Ondrejov, CZ)
report:
The 25cm robotic telescope FRAM-CTA at La Palma (Spain) reacted
robotically under inferior weather conditions to the alert of
GRB 191228A (Bernardini et al., GCN Circular 26601) and obtained
a set of 20s unfiltered images starting at 00:03:11.1 UT, i.e.
112s after the initial BAT trigger.
We do not detect any new source in comparison to USNO-B1.0
catalog neither in single images nor in a combined 20x20s frame
(mean exp time 363s post trigger, 3-sigma limit R>~17.7).