GRB 200829A: Swift/UVOT Detection
Abstract
The Swift/UVOT began settled observations of the field of GRB 200829A 138 s after the BAT trigger (Siegel et al., GCN Circ. 28307). The UV-optical source position is RA=251.204709, Dec=72.329356 deg (J2000) which is in sexagesimal: RA(J2000) = 16h 44m 49.14s Dec(J2000) = 72d 19' 45.63" with a positional uncertainty of 0.35" 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 138 288 147 14.29 +/- 0.02 white 576 596 19 15.43 +/- 0.04 white 1527 1547 19 16.38 +/- 0.06 v 626 646 19 15.50 +/- 0.10 b 552 572 19 15.68 +/- 0.07 u 296 546 246 14.54 +/- 0.03 u 700 720 19 15.12 +/- 0.07 w1 675 696 19 15.19 +/- 0.12 m2 1080 1100 19 16.25 +/- 0.25 w2 1032 1398 39 17.64 +/- 0.30 Note that the times are since the BAT trigger time. The main burst took place around 60s earlier during a Swift Slew. The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2020
- Bibcode:
- 2020GCN.28311....1K