HEAT mtg: Akash Anumarlapudi, UNC-Chapel Hill

Historically, most extragalactic transient phenomena were discovered at shorter wavelengths (gamma-rays to optical), with radio observations serving in a follow-up effort to understand these sources. This is partly due to the narrow field of view of radio interferometers, which meant that all-sky radio surveys were limited to single epochs (and often at different central frequencies), limiting the success of transient searches. However, modern wide-field radio interferometers, like the Australian SKA Pathfinder (ASKAP), are now in a position to perform multi-epoch all-sky radio surveys with a good cadence. These are starting to discover new classes of sources and phenomena that are extremely radio bright. Galactic sources from these searches include objects like long-period transients (LPTs) and Galactic radio transients (GRTs), with follow-up X-ray observations of some of these sources suggesting that they are compact binaries. Extragalactic sources include nuclear transients, some of which are radio afterglows to explosive transients like tidal disruption events (TDEs), but with a large fraction of these sources being faint at shorter wavelengths. Using the first 2.5 years of data from ASKAP surveys,  I will talk about the diversity of high-energy phenomena that these radio transients are starting to uncover and the implications of these radio-first discoveries.