GRB 231104A: Swift/UVOT Upper Limits
Abstract
The Swift/UVOT began settled observations of the field of GRB 231104A 91 s after the BAT trigger (Page et al., GCN Circ. 34940). No optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 34940) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white_FC 91 241 147 >21.7 u_FC 304 553 246 >20.7 white 91 1709 411 >21.8 v 633 1758 117 >19.3 b 559 1684 117 >20.4 u 304 1659 343 >20.9 w1 683 1808 117 >19.7 m2 659 679 20 >18.6 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.156 in the direction of the burst (Schlegel et al. 1998).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.34941....1K