Late-time radio detection of the TDE AT2018hyz by the VAST (ASKAP) project
ATel #15307; Assaf Horesh, Noam Burger, Itai Sfaradi (HUJI), Bryan Gaensler (UofT), Tara Murphy, James Leung (U. Sydney), Andrew Obrien, David Kaplan (UWM), and on behalf of the larger VAST collaboration.
on 2 Apr 2022; 05:58 UT
Credential Certification: Assaf Horesh (assafh@mail.huji.ac.il)
Subjects: Radio, Transient, Tidal Disruption Event
We report the discovery of late-time radio emission from the TDE AT2018hyz. AT2018hyz was discovered by the ASAS-SN project at optical wavelengths on 06 Nov 2018 (Brimacombe et al.; ATel #12194; TNS report 24133) and later classified as a TDE at a redshift of z=0.047 (Dong et al. ATel #12218). As part of the pilot phase of the Variable And Slow Transients survey (VAST; Murphy et al. 2021) on the Australian Square Kilometre Array Pathfinder (ASKAP), the position of AT2018hyz was observed multiple times.
Multiple observations during 2019 and 2020 resulted in non-detections. Radio emission was finally detected on 22 July 2021 at a flux density level of 1.3 +/- 0.3 mJy at a frequency of 0.89 GHz.
Following this detection we have triggered multiple followup observations using several radio observatories.
We encourage additional panchromatic followup.
We thank CSIRO staff for supporting these observations.
