GCN Circular 33528
Subject
GRB 230328B: Mondy optical afterglow confirmation
Date
2023-03-28T16:31:55Z (a year ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), E. Klunko (ISTP), A. Pozanenko (IKI), S. Belkin (IKI)
report on behalf of GRB IKI FuN:
We observed the field of Swift GRB 230328B (Gropp et al. GCN 33527)
with AZT-33IK telescope of Mondy observatory in R-filter on
2023-03-28 starting (UT) 15:27:18. We clearly detect the optical
afterglow of GRB 230328B (Gropp et al. GCN 33527) at the position of
(J2000) 19 24 01.828 +80 00 34.53 with an error of 0.5 arcsec in both
coordinates, which coincides with the position of UVOT (Gropp et al. GCN
33527).
Preliminary photometry of a stack of the first 5 images is following
Date UT start t-T0 Exp. Filter OT Err. UL(3sigma)
(mid, days) (s)
2023-03-28 15:27:18 0.026047 5*60 R 18.9 0.2 21.1
The photometry is based on nearby USNO-B1.0 stars.