TITLE: GCN CIRCULAR NUMBER: 33372 SUBJECT: GRB 230205A: VLA radio afterglow confirmation DATE: 23/02/23 21:04:20 GMT FROM: Genevieve Schroeder at Northwestern University genevieveschroeder2023@u.northwestern.edu

G. Schroeder, (Northwestern), T. Laskar (Utah) report:

"We re-observed the position of the possibly short GRB 230205A (Ambrosi et al., GCN 33271; Sakamoto et al., GCN 33280) with the Karl G. Jansky Very Large Array (VLA) under program 23A-296 (PI: Schroeder) beginning on 2023 February 22.52 UT (17.08 days post-burst) at a mean frequency of 6 GHz.

The radio source detected in the previous VLA observation at 2.81 days (Schroeder et al. GCN 33309) has brightened significantly at 6 GHz, confirming this source as the radio afterglow of GRB 230205A. We report an updated radio position of:

RA(J2000) = 13:28:16.837

Dec(J2000) = +46:43:33.13

With an uncertainty of ~0.1" in each coordinate.

Further observations are planned. We thank the VLA staff for quickly approving and executing these observations."