GRB 201104B: Swift/UVOT Detection
Abstract
The Swift/UVOT began settled observations of the field of GRB 201104B 56 s after the BAT trigger (Sbarufatti et al., GCN Circ. 28825). A source consistent with the XRT position (Sbarufatti et al. GCN Circ. 28825) is detected in the initial UVOT exposures. The preliminary UVOT position is: RA (J2000) = 00:20:51.65 = 5.21520 (deg.) Dec (J2000) = +07:50:29.4 = 7.84150 (deg.) with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence). Preliminary detections 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 56 206 147 18.63 +/- 0.06 u 268 459 188 19.45 +/- 0.23 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.045 in the direction of the burst (Schlegel et al. 1998).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2020
- Bibcode:
- 2020GCN.28827....1M