GCN Circular 37678
Subject
GRB 241001A: Swift/UVOT Detection
Date
2024-10-02T12:35:15Z (3 months ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
Via
email
A.A. Breeveld (UCL-MSSL) and R. Caputo (GSFC) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 241001A 6534 s after the SVOM/ECLAIRS trigger (Dagoneau et al. GCN 37655).
A fading source consistent with the optical afterglow position given by Izzo et al. (GCN 37673), and the XRT candidate (Osborne et al. GCN 37670) is found in the U band images.
Preliminary magnitudes using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 6533.5 8438.8 1875 20.20 ± 0.15
u 12310.1 13655.8 2649 20.91 ±0.24
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.013 in the direction of the burst (Schlegel et al. 1998).