GCN Circular 1842
D. A. Frail (NRAO), and E. Berger (Caltech) report on behalf of a larger collaboration: "We have continued to monitor the HETE burst GRB020819 with the VLA at 8.46 GHz. Two radio sources were identified within the initial 130-arcsec error circle of the SXC (GCN1508). The first source has remained constant (within the radiometric errors) at about 380 uJy. The second source has declined from a peak of 315 uJy on 2002 August 21.37 UT and is currently undetectable (i.e. <35 uJy). The variable source, located at r.a.=23:27:19.475, dec.=06:15:55.95 (epoch J2000) with conservative errors of +/-0.5 arcsec, is 98-arcsec away from the center of the revised SXC 64-arcsec error circle (GCN1526). From previous radio afterglow searches we note that the probability of detecting such extreme variability from non-GRBs is rare (<2% probability over the area surveyed). We request observers to re-examine this position for an optical afterglow. The entire radio dataset can be found at: http://www.aoc.nrao.edu/~dfrail/grb_public.shtml An 8.46 GHz light curve is at http://www.aoc.nrao.edu/~dfrail/g020819_lcx.ps This message may be quoted."