Ascertain whether a second TDE occurred in NGC 4845 in 2016

Determine whether the May 2016 radio brightening observed in NGC 4845 corresponds to a second tidal disruption event associated with IGR J12580+0134, resolving the current inability to confirm this interpretation due to the lack of contemporaneous X-ray observations.

Background

The system exhibited a late radio flare peaking in December 2011, several hundred days after the 2011 X-ray outburst, and a second radio peak in May 2016. While the 2011 multiwavelength behavior was consistent with a TDE accompanied by an off-beam relativistic jet, the nature of the 2016 radio event remains unclear.

The authors explicitly state that the absence of X-ray coverage in the months preceding the 2016 radio peak makes it impossible to confirm whether that event was a second TDE, leaving the question unresolved.