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. View this GCN Circular online at https://gcn.nasa.gov/circulars/43463. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...