TITLE:   GCN CIRCULAR
NUMBER:  26819
SUBJECT: LIGO/Virgo S200115j: Mondy upper limits for ZTF20aafqvyc/AT2020yq
DATE:    20/01/19 18:19:59 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

E. Mazaeva (IKI), A. Pozanenko (IKI), S. Belkin (IKI),   E. Klunko 
(ISTP),  A. Volnova (IKI)   report   on behalf of GRB IKI FuN:

We observed the ZTF20aafqvyc/AT2020yq (Anand et al., GCN 26767) found in 
the localization region of LIGO/Virgo S200115j (GCN 26759, GCN
26807)  with AZT-33IK telescope of Sayan observatory (Mondy) in two 
epochs.  We do not detect  any source at the coordinates the 
ZTF20aafqvyc/AT2020yq (Anand et al., GCN 26767).
Preliminary photometry of the field is following

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

2020-01-15 17:21:36   58863.73028  R        10*120  n/d   n/d   21.6
2020-01-16 17:10:33   58864.72261  R        10*120  n/d   n/d   22.1

The photometry is based on the nearby  USNO-B1.0  stars
USNO-B1.0 R2
1284-0073552 17.62
1284-0073507 18.38
1284-0073562 17.98
1284-0073542 16.97