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GCN Circular 33372

Subject
GRB 230205A: VLA radio afterglow confirmation
Date
2023-02-23T21:04:20Z (a year ago)
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."
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