GCN Circular 37991
Subject
GRB 241030B: optical observations from the INAF Asiago Observatory
Date
2024-10-30T23:17:51Z (a day ago)
From
Riccardo Brivio at INAF-OAB <riccardo.brivio@inaf.it>
Via
Web form
R. Brivio (INAF-OAB), D.B. Malesani (DAWN/NBI and Radboud Univ.), Y.-D. Hu (INAF-OAB), P. D'Avanzo (INAF-OAB), A. Reguitti (INAF-OAB / INAF-OAPd), A. Melandri (INAF-OAR), M. Ferro (INAF-OAB), L. Tomasella (INAF -OAPd), E. Cappellaro (INAF -OAPd) report on behalf of the CIBO collaboration:
We carried out follow-up optical observations of GRB 241030B detected by Fermi (Fermi GBM team, GCN 37980), Swift (Klingler et al., GCN 37981), and SVOM/ECLAIRs (Zhao et al., GCN 37984) from the INAF - Padova Astronomical Observatory located in Asiago (Italy) with the 67/92 Schmidt telescope starting on 2024-10-30 at 20:10:31 UT (~1.6 hours after the burst) with the r- and i-sdss filters.
In our stacked images the optical afterglow (Fu et al., GCN 37985; Odeh et al., GCN 37986; Moskvitin et al., GCN 37987) is marginally detected in the i band, at the following AB magnitude:
i = 20.8 +/- 0.3 (calibrated against the PanSTARRS catalog)
at a mid-time of t - t0 = 1.71 hours after the trigger.
The source is not detected in the r band down to the following 3 sigma upper limit:
r > 21.5 (AB, calibrated against the PanSTARRS catalog)
at a mid-time of t - t0 = 2.06 hours after the trigger.