[vsnet-grb-info 26990] GRB 201214A: TSHAO optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29093
SUBJECT: GRB 201214A: TSHAO optical upper limit
DATE:    20/12/19 22:01:24 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

S. Belkin (IKI), N. Pankov (HSE), I. Reva (FAPHI), V. Kim (FAPHI), A. 
Pozanenko (IKI) report on behalf of GRB IKI FuN:

We observed the field of GRB 201214A (Mereghetti et al., GCN  29037) 
with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory 
starting on Dec. 14 (UT) 18:15:39. We did not find any source in the 
enhanced XRT position  of an afterglow  (Kennea et al., GCN  29092), see 
also (Jelinek et. al GCN 29040; Kumar  et. al GCN 29091). Preliminary 
photometry of the filed is following.

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

2020-12-14 18:15:39 0.50959  R      22*90 n/d   n/d  21.1

The photometry is based on nearby USNO-B1.0 stars.