We thank the staff of the Owens Valley Radio Observatory, including J. Lamb, K. Hudson, A. Rizo and M. Virgin, for their assistance with the construction of the DSA-10. We thank A. Readhead for supporting the initiation of the DSA-10 project. We also thank A. Soliman for assistance with the development of the DSA-10 receivers. A portion of this research was performed at the Jet Propulsion Laboratory, California Institute of Technology, under a President and Directors Fund grant and under a contract with the National Aeronautics and Space Administration (NASA). This research was additionally supported by the National Science Foundation (NSF) under grant AST-1836018. V.R. acknowledges support as a Millikan Postdoctoral Scholar in Astronomy at the California Institute of Technology, and from a Clay Postdoctoral Fellowship of the Smithsonian Astrophysical Observatory. S.G.D. acknowledges partial support from NSF grant AST-1815034 and NASA grant 16-ADAP16-0232. 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, the University of California and NASA. The Observatory was made possible by the financial support of the W. M. Keck Foundation. This research made use of Astropy, a community-developed core Python package for astronomy. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max-Planck Institute for Astronomy, Heidelberg, the Max-Planck Institute for Extraterrestrial Physics, Garching, Johns Hopkins University, Durham University, the University of Edinburgh, Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, NASA under grant NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, NSF grant AST-1238877, the University of Maryland, Eotvos Lorand University, the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation.