TITLE:   GCN CIRCULAR
NUMBER:  38640
SUBJECT: EP241021a: VLA radio detection
DATE:    24/12/19 20:19:55 GMT
FROM:    Genevieve Schroeder at Northwestern University <genevieveschroeder@u.northwestern.edu>

G. Schroeder (Cornell), G. Srinivasaragavan (UMD), A. Ho (Cornell), D. Perley (LJMU), I. Andreoni (UNC), B. Cenko (GSFC), T. Ahumada (Caltech), M. Coughlin (UMN),  report:

We observed the field of the fast X-ray Transient EP 241021a (Hu et al. GCN 37834) with the Karl G. Jansky Very Large Array (VLA) under program 24B-497 (PI: Srinivasaragavan) starting on 2024 Dec 14 at 01:36:13 UTC (53.84 days after the EP trigger) for 1.5 hours at mean frequencies of 3, 6, 10, 15, and 33 GHz. The radio counterpart to EP 241021a (Ricci et al. GCN 37949; Carotenuto et al. GCN 38014) is significantly detected in all bands, with a 10 GHz flux density of ~880 microJy at a position of:

RA(J2000) = 01:55:23.432
Dec(J2000) = +05:56:17.82

with an uncertainty of ~0.1" in each coordinate. This position is consistent with the optical (Fu et al. 37840) and X-ray (Wang et al. GCN 37848) positions.

We thank the VLA staff for scheduling and executing these observations.