GRB 211207A: Swift/UVOT Detection
Abstract
The Swift/UVOT began settled observations of the field of GRB 211207A 85 s after the BAT trigger (Ambrosi et al., GCN Circ. 31182). A source consistent with the XRT position (Osborne et al. GCN Circ. 31184) is detected in the initial UVOT exposures. The preliminary UVOT position is: RA (J2000) = 09:58:29.79 = 149.62412 (deg.) Dec (J2000) = -24:21:31.3 = -24.35869 (deg.) with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence). Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white 85 234 147 17.52 +/- 0.04 v 627 1595 117 >18.5 b 553 743 36 19.08 +/- 0.31 u 297 546 246 18.15 +/- 0.09 w1 677 1470 97 >18.7 m2 652 1272 39 >18.7 w2 776 1570 78 >19.0 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.050 in the direction of the burst (Schlegel et al. 1998).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- December 2021
- Bibcode:
- 2021GCN.31204....1S