GCN Circular 42944
Subject
GRB 251126A: SAO RAS optical marginal detection
Event
Date
2025-12-02T12:05:32Z (3 days ago)
From
Alexander Moskvitin at SAO RAS <mosk@sao.ru>
Via
Web form
A. Moskvitin, O. Spiridonova, V. Shergin (SAO RAS),
A. Volnova (IKI), N. Pankov (HSE, IKI), A. Pozanenko (IKI)
report on behalf of IKI-GRB-FuN and GRB follow-up team.
We observed the field of the Swift GRB 251126A (Caputo et al.,
GCN 42843; Evans, GCN 42845; Goad et al., GCN 42851; Page et al.,
GCN 42860; Barthelmy et al., GCN 42876) with the Zeiss-1000
1m telescope of the SAO RAS starting on 2025-11-30 (UT) 00:19:43.
The optical afterglow (Swain, GCN 42844; Fu et al., GCN 42848;
Reguitti et al., GCN 42849; Broens et al., GCN 42850; Anguloet al.,
GCN 42855; Pulido-Torres et al; GCN 42856; Gupta et al., GCN 42857;
Cotter et al., GCN 42858; Seki et al., GCN 42859; Volnova et al.,
GCN 42861; Breeveld and Caputo, GCN 42863; Gupta et al., GCN 42864;
Burkhonov et al., GCN 42866; Maksut et al., GCN 42868;
Moskvitin et al, GCN 42870; Adami et al., GCN 42871; Pankov et al.,
GCN 42875; Goranskij et al., GCN 42896; Yao et al., GCN 42941)
is marginally detected in the stacked frame with the following
brightness.
Date UT start t-T0 Exp. Filter OT Err. UL
(mid,days) (n*s) (3sigma)
2025-11-30 00:19:43 3.24019 13*300 Rc 24.3 0.4 24.3
The preliminary photometry is based on nearby stars from the USNO-B1
catalogue (R2 magnitudes) and is not corrected for the Galactic
extinction.