The LSST Era of Supermassive Black Hole Accretion Disk Reverberation Mapping

The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will detect an unprecedentedly large sample actively accreting supermassive black holes with typical accretion disk (AD) sizes a few light days. This brings us to face challenges in the reverberation mapping (RM) measurement AD active galactic nuclei (AGNs) using interband continuum delays. We examine effect LSST cadence strategies on RM our metric AGNTimeLagMetric. It accounts for redshift, cadence, magnitude limit, corrections dust extinction. Running different strategies, we produce atlas performance estimations photometric measurements. provide upper limit estimated number quasars which time lag can be computed within 01000 sources each Deep Drilling field (DDF, 10 sq. deg) any filter, redshift distribution these peaking at z~1. find observation good (~ 5 days) long cumulative season (~9 yr), proposed DDF, favored size measurement. create synthetic curves most suitable DDF cadences determine lags demonstrate impact best based