GCN Circular 45360
Subject
GRB 260808B: SAO RAS optical observations
Event
Date
2026-08-12T11:55:25Z (2 months ago)
From
Alexander Moskvitin at SAO RAS <mosk@sao.ru>
Via
email
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.