[vsnet-grb-info 20445] GRB 180325A: D50 early optical follow-up

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22541
SUBJECT: GRB 180325A: D50 early optical follow-up
DATE:    18/03/25 13:20:11 GMT
FROM:    Martin Jelinek at Astro.Inst-AVCR,Ondrejov  <martin.jelinek at asu.cas.cz>

Jan Strobl, Martin Jelinek and Rene Hudec (ASU CAS Ondrejov)

report

We observed the field of the Swift GRB 180325A (Troja et al., GCNC 22532)
with the 0.5m telescope D50 in Ondrejov (Czech Republic), starting at
01:53:47.1 UT, i.e. 44.3s after the trigger.

The observation consisted of a series of 10 s unfiltered exposures,
covering the peak of the optical emission at mag ~16.3. The maximum seems
to be somewhat delayed with respect to the bright peak in gamma-rays.

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