Panoramic SETI: An all-sky fast time-domain observatory Thematic Areas: Optical and Infrared Observations from the Ground Technological Development Activity Astro2020 APC White Paper Corresponding Author: Shelley A. Wright (University of California, San Diego, saw@physics.ucsd.edu) Authors: Franklin P.Antonio (Qualcomm) Michael L. Aronson (University of California, San Diego) Samuel A. Chaim-Weismann (University of California, Berkeley) Maren Cosens (University of California, San Diego) Frank D. Drake (SETI Institute) Paul Horowitz (Harvard University) Andrew W. Howard (California Institute of Technology) Wei Liu (University of California, Berkeley) J´erˆome Maire, (University of California, San Diego) Andrew P. V. Siemion (University of California, Berkeley) Rick Raffanti (University of California, Berkeley) Guillaume D. Shippee (University of California, San Diego) Remington P. S. Stone (Lick Observatory) Richard R. Treffers (Starman Systems) Avinash Uttamchandani (Harvard University) Dan Werthimer (University of California, Berkeley) James Wiley (University of California, San Diego) Shelley A. Wright (University of California, San Diego)