AstroNote 2025-147

Using the e-MERLIN radio interferometer, we made observations centred on the reported location of supernova (SN) 2025gvs, attempting to detect synchrotron radio emission. Spending a total time on target of 04:21:26 (hh:mm:ss), using the C-band receivers at a centre frequency of 6.3 GHz. We report no radio source within 5 arcseconds of the reported location, with a 3-sigma RMS of 99 microJy/beam, consistent with a non-detection at this time.

At an estimated distance of 31 Mpc, the 3-sigma limit suggests an upper monochromatic luminosity limit of 1.05e26 erg/s/Hz at 6.3 GHz. Further observations of this supernova are planned.

We thank the staff of the e-Merlin for their support and assistance with these observations. e-MERLIN is a National Facility operated by the University of Manchester at Jodrell Bank Observatory on behalf of STFC, part of UK Research and Innovation.