of China (grants 11803049, 41727803). A.V.F.’s supernova group is grateful for financial assistance from the Christopher R. Redlich Fund, the TABASGO Foundation, and the Miller Institute for Basic Research in Science (U.C. Berkeley).

ASAS-SN is supported by the Gordon and Betty Moore Foundation through grant GBMF5490 to the Ohio State University, and by NSF grants AST-1515927 and AST-1908570. Development of ASAS-SN was supported by NSF grant AST-0908816, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics at the Ohio State University, the Chinese Academy of Sciences South America Center for Astronomy (CASSACA), the Villum Foundation, and George Skestos. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, theUniversity of California, and NASA; the Observatory was made possible by the generous financial support of the W. M. Keck Foundation. We thank the staffs at Lick and Keck Observatories for their assistance. Research at Lick Observatory is partially supported by a generous gift from Google.

We acknowledge the support of the staff of the Xinglong 2.16m telescope. This work was partially supported by the Open Project Program of the CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences. We acknowledge the Telescope Access Program (TAP) funded by NAOC, CAS, and the Special Fund for Astronomy from the Ministry of Finance. This work is partly based on NUTS2 observations made with the NOT, operated by the NOT Scientific Association at the Observatorio del Roque de