GCN Circular 37734
Subject
GRB 240910A: LBT optical observations
Event
Date
2024-10-08T12:52:51Z (a year ago)
From
Andrea Rossi at INAF <andrea.rossi@inaf.it>
Via
Web form
A. Rossi, E. Maiorano (INAF-OAS), and D. B. Malesani (DAWN/NBI and Radboud Univ.), report on behalf of the CIBO collaboration:
We observed the field of GRB 240910A (Zhang et al. GCN 37445; Ripa et al. GCN 37450; Godwin, GCN 37464) with the LBC camera mounted on LBT (Mt. Graham, AZ, USA) in r’ and z’ bands (15 min exposure time per filter) approximately at midtime 06:20:00 UT on 2024-09-26 (16.1 days after the burst). Observations were performed under mediocre weather conditions and an average seeing of ~1.7".
At the location of the afterglow (Julakanti et al. GCN 37459; Jiang et al. GCN 37460; D’Ai et al. GCN 37461; Malesani et al. GCN 37463; Qiu et al. GCN 37503; Evans et al., GCN 37553; Giarratana et al., GCN 37569) we detect a faint source with the following AB magnitudes:
r’ = 26.1 +- 0.4,
z' > 24.4,
calibrated against SDSS field stars, and not corrected for foreground Galactic extinction.
We acknowledge the excellent support from the LBTO and LBT-INAF staff, particularly F. Cusano and D.Paris in obtaining these observations.