We observed the field of the type II SN 2024iss (TNS report 210230) with the Arcminute Microkelvin Imager - Large Array (AMI-LA) for 4 hours on the 2024-05-22, with a central frequency of 15.5 GHz. A point source is detected in the AMI-LA image at RA = 12:59:06.089 +/- 0.01 s, Dec = +28:48:41.16 +/- 1.87 arcsec, consistent with the reported position of SN 2024iss. The source is detected at a flux density of 3.5 +/- 0.2 mJy.
Past pre-discovery radio observation of the field of SN 2024iss was performed by the VLA Sky Survey (VLASS) on 2023-01-18 (epoch 3.1), at a central frequency of 3 GHz. The VLASS image of the field of SN 2024iss 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 | 2024iss | 12:59:06.145 | +28:48:42.67 | SN II | 0.00333 | 12:59:06.130 | +28:48:42.62 | SN IIb | 0.003334 |