GCN Circular 22497
Subject
GRB 180314B: Zeiss-1000/CrAO optical upper limit
Date
2018-03-15T17:48:37Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), A. Novichonok (KIAM, PetrSU), I.
Nikolenko (CrAO), A. Volnova (IKI), I. Molotov (KIAM) report on behalf
of larger GRB follow-up collaboration:
We observed the field of Swift GRB 180314B (D'Avanzo et al., GCN 22491)
with Zeiss-1000/Koshka (CrAO) telescope starting March 15 (UT) 01:55:39.
We obtained several images in R-filter. We do not detect any source
within enhanced Swift-XRT position (Beardmore et al., GCN 22494).
Preliminary photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-03-15 01:55:39 0.15459 R 7*180 n/d n/d 22.2
The photometry is based on nearby USNO-B1.0 stars
USNO-B1_id R1
1135-0426232 15.02
1135-0426125 15.64
1136-0433074 16.46