A Gorenstein criterion for strongly F-regular and log terminal singularities

A conjecture of Hirose, Watanabe, and Yoshida offers a characterization of when a standard graded strongly F-regular ring is Gorenstein, in terms of an F-pure threshold. We prove this conjecture under the additional hypothesis that the anti-canonical cover of the ring is Noetherian. Moreover, under this hypothesis on the anti-canonical cover, we give a similar criterion for when a normal F-pure (respectively log canonical) singularity is quasi-Gorenstein, in terms of an F-pure (respectively log canonical) threshold.