For the first time, the entire visible sky is being surveyed for the violent, variable, and transient events that shape our universe by the All-Sky Automated Survey for Supernovae (ASAS-SN). Combined, ASAS-SN, Asteroid Terrestrial-impact Last Alert System (ATLAS), The Zwicky Transient Facility (ZTF), the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS), and Gaia monitor the whole sky, at high cadence with a combined total of 11 telescopes distributed at 8 sites around and above the world. Furthermore, NASA's Transiting Exoplanet Survey Satellite (TESS) has recently proven itself to also be a capable Transient Explorer Survey Satellite. Each survey has a different cadence and depth. I will briefly review major ongoing transient surveys, contrasting their capabilities and goals. I will then use a handful of recent discoveries to highlight opportunities that these new capabilities present. I will focus on multi-messenger astronomy (with LIGO and IceCube); multi-wavelength astronomy (with Swift, NICER, MAXI, and Fermi); and high-cadence, high-precision observations (with Kelper and TESS). I will reflect on the challenges the field will face both now and in the LSST-era. Finally, I will end by describing new and future ways we are making ASAS-SN an even more useful tool for the entire
Topic: Astronomy Colloquium (SP2021)
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