Quasar variability

Changing-state quasars

Collaborators: Barry McKernan (AMNH/CUNY), Saavik Ford (AMNH/CUNY), Nic Ross (ROE), Daniel Stern (Caltech/JPL)

https://www.scientificamerican.com/article/lights-out-astronomers-illuminate-the-mystery-of-vanishing-quasars/

Supermassive black hole binaries

Collaborators: S. George Djorgovski (Caltech), Daniel Stern (Caltech/JPL)

Gravitational lenses

Collaborators: Alberto Krone-Martins (UC Irvine), S. George Djorgovski (Caltech), Daniel Stern (Caltech/JPL)

Time series analysis

Collaborators: Tamas Budavari (JHU), Tom Loredo (Cornell)