TITLE: GCN CIRCULAR NUMBER: 43473 SUBJECT: GRB 260114A: Swift/UVOT Upper Limits DATE: 26/01/20 17:04:02 GMT FROM: Mike Siegel at PSU/Swift MOC <mhs18@psu.edu> M.H. Siegel (PSU) and R. A. J. Eyles-Ferris (U Leicester) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 260114A 164 s after the BAT trigger (Eyles-Ferris et al., GCN Circ. 43396). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ 43412) or the faint red counterpart (Li et al., GCN Circ. 43398; Volnova et al, GCN Circ. 43401) 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 164 848 102 >20.50 v 705 1100 52 >18.44 b 631 824 38 >19.22 u 507 799 136 >19.56 uvw1 755 774 19 >17.70 uvm2 730 750 19 >17.28 uvw2 681 1080 58 >18.59 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.069 in the direction of the burst (Schlegel et al. 1998) View this GCN Circular online at https://gcn.nasa.gov/circulars/43473. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...