AstroNote 2025-20

We observed the field of the TDE AT2024tvd (Sollerman et al. 2024; TNS discovery report 2024-3166, Faris et al. 2024; TNS classification report 18377) with the Arcminute Microkelvin Imager - Large Array (AMI-LA) on 2025-01-13, with a central frequency of 15.5 GHz. A point source is detected in the AMI-LA image at RA = 17:10:42.573 +/- 0.01 s, Dec = +28:50:15.4 +/- 3.34 arcsec, consistent with the reported position of AT2024tvd. The source is detected at a flux density of 0.72 +/- 0.07 mJy.

Optical analysis by Yao et al. (AstroNote 2025-13) suggests that the TDE AT2024tvd is off-nuclear with ~1’’ separation from the host galaxy nucleus. Recently, Sfaradi et al. (AstroNote 2025-14) reported the first detection of radio emission from AT2024tvd, using VLA observations. Sfaradi et al. detected two radio sources at 10 GHz, a weak ~0.05 mJy source consistent with the host nucleus and a second one much brighter with a flux level of ~0.6 mJy consistent with the position of AT2024tvd. Given the AMI-LA beam size, we cannot separate the two components, but assume, based on the report by Sfaradi et al., that the host contribution to the emission we detect is negligible. 

We plan to perform follow-up observations with the AMI-LA and encourage further high-cadence multi-frequency radio observations with other facilities.

We thank the staff of MRAO for scheduling and performing this observation.