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Searching for Strong Gravitational Lenses

Hezaveh, Yashar; Courbin, Frédéric; Leung, Calvin +9 more

Strong gravitational lenses provide unique laboratories for cosmological and astrophysical investigations, but they must first be discovered - a task that can be met with significant contamination by other astrophysical objects and asterisms. Here we review strong lens searches, covering various sources (quasars, galaxies, supernovae, FRBs, GRBs, …