NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200614d03h59m35s163718usUT NOTE: Source region spec. is: 153.04083 45.75414 4" NOTE: Used archived XRT position of 153.04083 45.75414 4.00 NOTE: position reference is GRB_Auto_Processing NOTE: Possible detection in uu at T+43621.0 NOTE: Possible detection in wh at T+50196.6 =========== Draft Upper Limit Circular ======== GRB 200613A: Swift/UVOT Upper Limits ***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 200613A 43621 s after the LAT trigger (***Author*** et al., GCN Circ. ????). No optical afterglow consistent with the XRT position *** POSITION REFERENCE is GRB_Auto_Processing *** 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 initial exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag white 50197 56308 1173 >19.5 v 50992 51208 213 >18.6 u 43621 62180 2355 >18.8 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998). =========== Draft Detection Circular ======== GRB 200613A: Swift/UVOT Detection ***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 200613A 43621 s after the LAT trigger (***Author*** et al., GCN Circ. ????). A source consistent with the XRT position *** POSITION REFERENCE is GRB_Auto_Processing *** is detected in the initial UVOT exposures. The preliminary UVOT position is: RA (J2000) = 10:12:10.03 = 153.04178 (deg.) Dec (J2000) = +45:45:14.1 = 45.75391 (deg.) with an estimated uncertainty of 0.46 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 50197 50985 775 19.65 +/- 0.07 v 50992 51208 213 >18.6 u 49402 50190 775 19.02 +/- 0.12 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).