A possible AMI-LA radio detection of the Tidal Disruption Event AT 2023clx
ATel #15918; Itai Sfaradi (HUJI), Assaf Horesh (HUJI), Joe Bright (Oxford), Rob Fender (Oxford), Lauren Rhodes (Oxford), Dave Green (Cambridge), David Titterington (Cambridge)
on 28 Feb 2023; 17:41 UT
Credential Certification: Assaf Horesh (assafh@mail.huji.ac.il)
Subjects: Radio, Transient, Tidal Disruption Event
We observed the field of the TDE AT 2023clx (TNS report 171535) with the Arcminute Microkelvin Imager - Large Array (AMI-LA) for 4 hours on the 2023-02-27, with a central frequency of 15.5 GHz. A point source is detected in the AMI-LA image at RA = 11:40:09.39 +/- 0.25 s, Dec = +15:19:40.21 +/- 1.65 arcsec, consistent with the reported position of AT2023clx. The source is detected at a flux density of 0.40 +/- 0.08 mJy. Further observations are needed to confirm the transient nature of the radio source.
Past pre-discovery radio observations of the field of AT 2023clx were performed by the VLA Sky Survey (VLASS) at three different epochs (epoch numbers 1.1, 2.1, and 3.1), with the latest observation on the 2023-01-17, at a central frequency of 3 GHz. Stacked VLASS images of the field of AT2023clx show no emission from the reported position with a 3-sigma rms of 0.37 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.
