A VERITAS/Breakthrough Listen Search for Optical Technosignatures
astro-ph.IM
/ Authors
Atreya Acharyya, Colin Adams, Avery Archer, Priyadarshini Bangale, Pedro Batista, Wystan Benbow, Aryeh Brill, M Capasso, Manel Errando, Abraham Falcone
and 58 more authors
Qi Feng, John Finley, Gregory Foote, Lucy Fortson, Amy Furniss, Sean Griffin, William Hanlon, David Hanna, Olivier Hervet, Claire Hinrichs, John Hoang, Jamie Holder, T. Humensky, Weidong Jin, Philip Kaaret, Mary P. Kertzman, Maria Kherlakian, David Kieda, Tobias Kleiner, Nikolas Korzoun, Sajan Kumar, Mark Lang, Matthew Lundy,
/ Abstract
The Breakthrough Listen Initiative is conducting a program using multiple telescopes around the world to search for "technosignatures": artificial transmitters of extraterrestrial origin from beyond our solar system. The VERITAS Collaboration joined this program in 2018, and provides the capability to search for one particular technosignature: optical pulses of a few nanoseconds duration detectable over interstellar distances. We report here on the analysis and results of dedicated VERITAS observations of Breakthrough Listen targets conducted in 2019 and 2020 and of archival VERITAS data collected since 2012. Thirty hours of dedicated observations of 136 targets and 249 archival observations of 140 targets were analyzed and did not reveal any signals consistent with a technosignature. The results are used to place limits on the fraction of stars hosting transmitting civilizations. We also discuss the minimum-pulse sensitivity of our observations and present VERITAS observations of CALIOP: a space-based pulsed laser onboard the CALIPSO satellite. The detection of these pulses with VERITAS, using the analysis techniques developed for our technosignature search, allows a test of our analysis efficiency and serves as an important proof-of-principle.