TITLE: GCN CIRCULAR NUMBER: 15834 SUBJECT: GRB 140213A: Swift/UVOT Observations DATE: 14/02/14 21:45:33 GMT FROM: Mike Siegel at PSU/Swift MOC M. H. Siegel (PSU) and S. T. Holland (STScI) report on behalf of the Swift/UVOT team: The Swift/UVOT has continued to observe GRB 140213A (Holland et al., GCN 15825). We find that the optical afterglow is slowly fading but still detected in all UVOT filters as of 68 ks after the BAT trigger. The preliminary UVOT position is: RA (J2000) = 07:00:37.13 = 105.15472 (deg.) Dec (J2000) = -73:08:13.5 = -73.13707 (deg.) with an estimated uncertainty of 0.51 arc sec. (radius, 90% confidence). Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) are: Filter T_start(s) T_stop(s) Exp(s) Mag white (fc) 3428 3578 147 17.70+-0.04 white 4610 4809 196 18.08+-0.05 v 3584 3784 196 18.03+-0.12 v 9217 10124 885 19.06+-0.13 v 27349 28053 685 19.73+-0.35 b 4405 4605 196 18.40+-0.09 b 61868 62291 412 19.52+-0.13 u (fc) 4200 4399 196 17.40+-0.06 u 21642 22285 625 18.81+-0.11 u 60956 61863 885 18.91+-0.08 uvw1 3995 4194 196 17.65+-0.10 uvw1 14948 21635 1242 18.79+-0.08 uvm2 3789 3989 196 17.77+-0.14 uvm2 10129 10771 632 18.52+-0.12 uvm2 33470 49991 1348 19.47+-0.14 uvm2 66689 67589 885 19.26+-0.15 uvw2 4816 5012 193 18.46+-0.17 uvw2 26443 27343 885 20.06+-0.21 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.15 in the direction of the burst (Schlegel et al. 1998).