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GCN Circular 19955

GRB160927A: D50 optical limit
2016-09-27T21:09:50Z (8 years ago)
Martin Jelinek at Astro.Inst-AVCR,Ondrejov <>
Martin Jelinek, Jan Strobl, Rene Hudec, Vojtech Simon
and Cyril Polasek (ASU CAS Ondrejov, CZ) report:

The 50cm robotic telescope (D50) of Ondrejov
observatory in Czech republic reacted robotically to
the alert of GRB160927A (Gibson et al, GCNC 19952),
obtaining a series of 10s unfiltered images starting at
18:05:29.9UT, i.e. 40s post trigger.

We do not detect any new source within or near the XRT
error circle (Evans, GCNC 19953) in comparison to
USNO-B1.0 catalog neither in single images (3-sigma
limit R>18.7) nor in a combined 25x10s frame (mean exp
time 124s post trigger, 3-sigma limit R>20.5).
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