All Sky Automated Survey for SuperNovae

The All Sky Automated Survey for SuperNovae (ASAS-SN) is a survey using 24 telescopes around the world. (It began with four telescopes at Haleakala Hawaii, and four at Cerro Tololo, Chile.) It is an improved version of All Sky Automated Survey (ASAS) with better sensitivity for discovering more transients including distant supernovae, able to detect new objects with magnitudes 8 to 18. Discovered objects are labeled ASASSN-xxxx, the latter part being two digits and two letters.