GCN Circular 39107
Subject
GRB 250129A: SAO RAS optical observations
Date
2025-01-31T12:29:18Z (5 days ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
Via
Web form
A. Moskvitin, O. Spiridonova, Yu. Sotnikova (SAO RAS),
A. Ghosh, S. Razzaque (CAPP, University of Johannesburg)
We observed the field of GRB 250129A (Beardmore et al., GCN 39066)
with the SAO RAS 1-m telescope Zeiss-1000 on January 30, 23:46:43 --
January 31, 00:19:22 UT (t_mid - T0 = 43.298 hours = 1.8041 days).
We obtained 5 x 300 sec. images in Rc band.
The OT (Francile et al., GCN 39065; GCN 39075, Beardmore et al.,
GCN 39066, Schneider et al., GCN 39071, Belkin et al., GCN 39072;
Izzo et al., GCN 39073; Izzo and Malesani, GCN 39074; Ghosh et al.,
GCN 39077; Schneider et al., GCN 39078; Brivio et al., GCN 39079;
Siegel and Beardmore, GCN 39085; Zheng and Filippenko, GCN 39090;
GCN 39102; Schlekat et al., GCN 39091; Antier et al., GCN 39096;
Odeh et al., GCN 39097; Ferro et al., GCN 39098; Bochenek and Perley,
GCN 39099; Malesani et al., GCN 39100; Romanov, GCN 39101;
Watson et al., GCN 39104; Vinko et al., GCN 39105; Akl et al.,
GCN 39106) is clearly detected in the stacked frame
with the brightness of R = 19.65 +/- 0.13 (calibrated against R2
magnitudes of nearby UNSO-B1 stars and not corrected for the MW
extinction).