TITLE: GCN GRB OBSERVATION REPORT NUMBER: 63 SUBJECT: GRB980425: Radio Observations DATE: 98/05/01 20:44:46 GMT FROM: Dale A Frail at NRAO GRB 980425: Radio Observations M. Wieringa (ATNF), D.A. Frail (NRAO), S.R. Kulkarni (Caltech), J.L. Higdon (ATNF), R. Wark (ATNF), and the BeppoSAX GRB Team report: Radio observations were made with the Australian Telescope Compact Array beginning on April 28.73 and April 28.98 UT at 6cm and 3cm, centered on the position of 1SAXJ1935.0-5248, an X-ray source detected by the NFI on BeppoSAX (Pian et al. 1998; GCN #61). In addition, radio observations of the transient BeppoSAX NFI source 1SAXJ1935.3-5252 were made (also at 6cm and 3cm) on April 29.79 and April 30.00 UT No radio sources were detected in the 1' error radius of the two NFI sources. Typical three-sigma limits were 0.26 mJy and 0.3 mJy at 3cm and 6cm, respectively. Three radio sources are detected in the 8' error radius of the BeppoSAX WFC. There is one object just outside the error circle of 1SAXJ1935.0-5248 at RA 19:34:56.49, Dec -52:49:04.9 (J2000) with a flux density of 2.4 mJy at 6cm and 1.1 mJy at 3cm. The brightest radio source in the field is at RA 19:35:03.31, Dec -52:50:44.7 (posn. error +/-0.1"). It coincides within the likely optical astrometric errors to the candidate supernova proposed by Galama et al. (1998, GCN# 60) in the barred spiral Galaxy ESO 184-82. Approximate flux densities (corrected for primary beam attenuation) on April 28 were 9.3 mJy and 17 mJy at 6cm and 3cm, respectively. Further observations of 1SAXJ1935.3-5252 are planned. This message is citable.