We report the detection of radio emission from the nearby tidal disruption event TDE 2025aarm (Faris et al., AstroNote 2025-311) using the Karl G. Jansky Very Large Array (VLA). The field was observed at Ku band (12-18 GHz) on 2025 November 4 at 06:25 UT under program 25A-300 (PI: K. Alexander). The data were calibrated using 3C147 as the flux density calibrator and J0423−0120 as the gain calibrator, and were reduced in CASA following standard procedures.
We detect a point source at 15.1 GHz with a flux density of 36 +/- 6 +/- 4 microJy (statistical +/- systematic) at coordinates (RA, Dec) 04:32:12.41, -05:22:39.69 with a positional uncertainty of 0.03” in each coordinate. This position is coincident with the optical coordinates of TDE 2025aarm (O'Neill et al., TNS Astronomical Transient Report No. 273709). The in-band spectral index is positive, indicating that the radio spectrum is brighter at higher frequencies. The observed flux density is also consistent with the 5 and 8 GHz upper limits presented in Sfaradi et al., AstroNote 2025-313. At a distance of ~60 Mpc (z = 0.01368), our detection corresponds to a luminosity of ~1.5e+26 erg/s/Hz, making this one of the least luminous detections of radio emission from a TDE to date.
Further observations to constrain the broadband radio spectrum of the source are planned. We encourage additional multi-wavelength follow-up.
We thank the VLA staff for rapidly executing these observations.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2025aarm | 04:32:12.395 | -05:22:39.71 | TDE | 0.01368 | 04:32:12.399 | -05:22:39.51 | TDE | 0.01368 |
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