TITLE:   GCN CIRCULAR
NUMBER:  45360
SUBJECT: GRB 260808B: SAO RAS optical observations
DATE:    26/08/12 11:55:25 GMT
FROM:    Alexander Moskvitin at SAO RAS <mosk@sao.ru>

A. Moskvitin (SAO RAS), O. Spiridonova (SAO RAS), A. Pozanenko (IKI),
A. Volnova (IKI), N. Pankov (IKI) report on behalf of GRB follow-up team

We observed the field of the GRB 260808B discovered by the SVOM
(Bouchet et al., GCN 45316; Brunet et al., GCN 45333), also detected
by EP-FXT (Wang et al., GCN 45322) with the Zeiss-1000, SAO RAS 1-m
telescope + CCD photometer. The observations were carried out on August 9,
00:11:49--00:38:47 UT. We obtained 5 x 300 sec images in Rc band.

The OT (Turpin et al., GCNs 45317; 45318; Li et al. GCN 45320;
Adami et al., GCN 45323; Saccardi et al., GCN 45328; Schneider et al.,
GCN 45329; Bochenek and Perley, GCN 45330; Basa et al., GCN 45341;
Burkhonov et al., GCN 45352; Li et al. GCN 45359) is clearly detected
in our stacked image. Details of the observation are the following.

Date,      UTstart, t-T0,   Exp., Filter, Mag,     Err.,     UL
                    (mid,d) (n*s)                          (3-sigma)
2026-08-09 00:11:49 0.41968 5*300 Rc     22.44 +/- 0.13    23.2

This preliminary photometry (Vega) is based on nearby SDSS stars
(Lupton 2005 transformation) and not corrected for Galactic extinction.