TITLE:   GCN CIRCULAR
NUMBER:  27440
SUBJECT: GRB 200324A:: TSHAO optical upper limit
DATE:    20/03/25 14:19:13 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

S. Belkin (IKI), I. Reva (FAPHI), A. Pozanenko (IKI), M. Krugov (FAPHI), 
   E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB-FuN:

We observed the field of GRB 200324A: (Dichiara et al.  GCN 27428) with 
Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory starting 
on Mar. 24 (UT) 17:35:57.   We found no one object within enhanced 
Swift-XRT position (Beardmore et al., GCN 27430).  Preliminary 
photometry of the field is following.

Date       UT start t-T0    Filter  Exp. OT    Err. UL(3 sigma)
                     (mid, days)     (s)

2020-03-24 17:35:57 0.0638  R      4200  n/d   n/d  21.3

The photometry is based on nearby SDSS-DR12 stars.

RA DEC               R(Lupton transformation)
222.719432 35.941281 17.353
222.755165 35.913578 16.314
222.698647 35.902796 16.214
222.827959 35.919356 15.822