GCN Circular 23596
Subject
GRB 181228A: Mondy and AbAO optical upper limits
Date
2018-12-31T17:37:10Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), R. Ya. Inasaridze
(AbAO), E. Mazaeva (IKI), A. Volnova (IKI), V. R. Ayvazian (AbAO),
G. V. Kapanadze (AbAO) report on behalf of the IKI GRB-FuN:
We observed the field of GRB 181228A (Moss et al., GCN 23570; Beardmore
et al., GCN 23574) with AZT-33IK telescope of Sayan observatory (Mondy)
starting on Dec. 28 (UT) 13:48:11 in I-filter, and AS-32 telescope of
Abastumani Observatory (AbAO) on Dec. 28 (UT) 15:13:46 in R-filter. We
do not detected the afterglow (D'Avanzo et al., GCN 23575; Lipunov et
al. GCN 23576; Xu et al., GCN 23593).
Preliminary photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-12-28 13:48:11 0.47494 I 30*120 n/d n/d 23.8
2018-12-28 15:13:46 0.54879 R 63*60 n/d n/d 21.0
The photometry is based on nearby USNO-B1.0 stars
USNO-B1.0_id R2 I2
1032-0046066 16.66 16.08
1031-0043284 16.04 15.36