The Millimeter Transient Sky: The Millimeter Transient Sky: Detecting and characterizing astrophysical transients in data from the Atacama Cosmology Telescope

 Due to their large sky area and high sensitivity, cosmic microwave background (CMB) surveys are uniquely positioned to perform untargeted searches in millimeter wavelengths for objects with sudden changes in brightness, or "transients". These data provide us insights into the mechanisms and statistical properties of a variety of phenomena such as gamma ray bursts, fast radio bursts, and magnetically active flaring stars. In this talk I will present the current state of millimeter transient astronomy with a focus on my work building a blind transient search pipeline for the Atacama Cosmology Telescope. I will highlight results from this search including unprecedented millimeter observations of a classical nova. I will also discuss the applications of this pipeline for the Simons Observatory Large Aperture Telescope, a future CMB survey being built in the Atacama Desert, and how we may use this instrument to provide real time transient event alerts. Lastly, I will reflect on the future of millimeter transient astronomy and the role CMB surveys can play in progressing the field.