We observed the field of the type II SN 2024ehs (TNS report 205315) with the Arcminute Microkelvin Imager - Large Array (AMI-LA) for 4 hours on the 2024-03-20, with a central frequency of 15.5 GHz. This resulted in an image rms of 0.056 mJy. A point source is detected in the AMI-LA image at RA = 10:53:00.48 +/- 0.03 s, Dec = +17:34:19.83 +/- 1.4 arcsec, consistent with the reported position of SN 2024ehs. The source is detected at a flux density of 1.11 +/- 0.07 mJy.
Past pre-discovery radio observation of the field of SN 2024ehs was performed by the VLA Sky Survey (VLASS) on 2021-11-17 (epoch 2.2), at a central frequency of 3 GHz. The VLASS image of the field of SN 2024ehs shows no emission from the reported position with a 3-sigma rms of 0.35 mJy.
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.
| 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 | 2024ehs | 10:53:00.536 | +17:34:21.40 | SN II | 0.003776 | 10:53:00.536 | +17:34:21.40 | SN II | 0.003776 |
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