GCN Circular 38749
Subject
EP241217a: VLA Radio Detection
Date
2025-01-01T07:00:59Z (17 days ago)
From
Tao An at SHAO, CAS <antao@shao.ac.cn>
Via
Web form
Tao An, Yuanqi Liu (Shanghai Astronomical Observatory, China), Jinjun Geng, Xuefeng Wu (Purple Mountain Observatory, China) report on behalf of the EP radio follow-up team:
We report VLA radio observations of EP241217a. Following the Einstein Probe (EP) detection (GCN 38586) and subsequent X-ray detections by Swift/XRT (GCN 38596, 38624), we conducted radio follow-up observations with the Karl G. Jansky Very Large Array (VLA).
We detected a point radio source at the position reported by the EP/FXT and Swift/XRT on 2024 December 21 UT01:00. Data calibration used the VLA calibration and imaging pipeline in CASA 6.5.4.9. The preliminary analysis suggests a flux density of 20±6.6 microJy (at 3 GHz), 58±4 microJy (at 6 GHz) and 99.3±4.1 microJy at 10 GHz.
We have obtained multi-band, multi-epoch VLA monitoring observation time and are conducting long-term monitoring of this interesting object.
We thank the TAC and operations team of VLA for making these observations in a timely manner. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.