GCN Circular 44761
Subject
GRB 260516D: VLA radio detection
Event
Date
2026-06-01T21:56:18Z (2 days ago)
From
Daniel Perley at Liverpool JMU <d.a.perley@ljmu.ac.uk>
Via
Web form
Daniel A. Perley (LJMU), Genevieve Schroeder (Cornell), and Anna Y. Q. Ho (Cornell) report:
We observed the location of the X-ray flash GRB 260516D (Brunet et al., GCN 44649; Brunet et al., 44667) using the Karl G. Jansky Very Large Array on 2026-05-22 between 10:46-11:33 UT (approximately 5.6 days after the GRB trigger) using the X-band receivers (mean frequency 10 GHz). A source is detected at the location of the optical transient (Li et al., GCN 44654) with a flux density of 34.9 +/- 8.8 uJy.
The inferred luminosity of 2.9 x 10^30 erg/s/Hz is characteristic of GRB afterglows at the equivalent rest-frame post-GRB time, but at the low end of the distribution.
We thank the NRAO staff for scheduling and executing these observations.