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GCN Circular 29210

Subject
GRB 201216C: TSHAO, Terskol, Mondy optical upper limits
Date
2020-12-31T17:43:53Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI),  M. Krugov (FAI), P. Levkina 
(INASAN), E. Klunko (ISTP), N. Pankov (IKI, HSE)   report on behalf of 
GRB IKI FuN:

We observed   GRB 201216C (Beardmore et al., GCN  29061)  with 
Zeiss-1000 (West) telescope of TSHAO, Zeiss-2000 telescope of Terskol 
observatory, and AZT-33IK telescope of Mondy observatory.  The optical 
afterglow (Izzo et al., GCN  29066; Jelinek  et al., GCN 29070; Oates et 
al., GCN 29071; Shrestha et al., GCN  29085) at possible redshift of z = 
1.1  of presumably optically dark GRB (Vielfaure et al., GCN 29077) is 
not detected in our observations. Preliminary photometry of the field is 
following.

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

2020-12-17 14:20:49  0.6968    R  60*180   n/d  n/d  19.8 Zeiss-1000(W)
2020-12-18 16:47:27  1.7653    R  28*180   n/d  n/d  21.9 Zeiss-2000
2020-12-19 12:00:27  2.5681    R  45*120   n/d  n/d  22.1 AZT-22

Photometry is based on USNO-B1.0 stars
USNO-B1.0_id R2
1065-0011134 15.33
1065-0011173 15.44
1064-0011283 16.67
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