[vsnet-grb-info 26118] GRB 200806A: AbAO optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28218
SUBJECT: GRB 200806A: AbAO optical upper limit
DATE:    20/08/07 12:55:16 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

S. Belkin (IKI), A. Pozanenko (IKI), R.Ya. Inasaridze (AbAO),  N. Pankov 
(HSE), K. Kamyshnikov (HSE),  V.R. Ayvazian (AbAO),  G.V.  Kapanadze 
(AbAO), E. Mazaeva (IKI), A. Volnova  (IKI),  I. Molotov (KIAM) report 
on behalf of  GRB IKI FuN:

We observed the field of Swift GRB 200806A (Ambrosi et al., GCN 28211) 
also registered by AstroSat CZTI (Gupta et al., GCN 28216)  with AS-32 
(0.7m) telescope of Abastumani Observatory starting on 2020-08-06 (UT) 
23:42:53.  We do not detect any object  within the enhanced XRT position 
error circle (Beardmore et al., GCN 28214).  Preliminary photometry of 
the field is following.

Date       UT start  t-T0    Filter Exp.  OT    Err. UL
                     (mid, days)     (s)
2020-08-06 23:42:53  0.36498 R      63*60 n/d   n/d  21.0

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

USNO-B1.0_id R2
1270-0058216 15.48
1270-0058260 14.22
1270-0058260 14.98
1271-0065622 15.31