TITLE:   GCN CIRCULAR
NUMBER:  43463
SUBJECT: EP260119a: SAO RAS optical observations
DATE:    26/01/20 00:19:23 GMT
FROM:    Alexander Moskvitin at SAO RAS <mosk@sao.ru>

A. S. Moskvitin and O. I. Spiridonova (SAO RAS)
report on behalf of GRB follow-up team.

We observed the field of the EP260119a (Jiang et al., GCN 43447; 
Cheng et al., GCN 43449) with the Zeiss-1000 1m telescope
of the SAO RAS equipped with the CCD photometer. We obtained 
8 x 300 sec in Ic band on on Jan. 19, 21:33:52--22:18:23 UT 
(t_mid - T0 = 0.90439 days).
 
The OT (Fortin et al., GCN 43450; GCN 43455; Eyles-Ferris et al., 
GCN 43452) is clearly detected in our stacked frame 
with the brightness of I = 20.8 +/- 0.1 (I_lim = 22.0).
This preliminary photometry is based on several nearby SDSS stars 
(I-magnitudes obtained with Lupton 2005 transformation) 
and is not corrected for the Galactic extinction. 
Magnitudes is in Vega system.