This overview paper describes the legacy prospect and discovery potential of the Dark
Energy Survey (DES) beyond cosmological studies, illustrating it with examples from the …

The quest for binary and dual supermassive black holes (SMBHs) at the dawn of the multi-
messenger era is compelling. Detecting dual active galactic nuclei (AGN)–active SMBHs at …

We present reverberation map** results from the first year of combined spectroscopic and
photometric observations of the Sloan Digital Sky Survey Reverberation Map** Project …

Hierarchical assembly models predict a population of supermassive black hole (SMBH)
binaries. These are not resolvable by direct imaging but may be detectable via periodic …

We present ground-based optical photometric monitoring data for NGC 5548, part of an
extended multiwavelength reverberation map** campaign. The light curves have nearly …

The next two decades are expected to open the door to the first coincident detections of
electromagnetic (EM) and gravitational-wave (GW) signatures associated with massive …

It is well known that reverberation map** of active galactic nuclei (AGNs) reveals a
relationship between AGN luminosity and the size of the broad-line region, and that use of …

The radius–luminosity () relationship of active galactic nuclei (AGNs) established by the
reverberation map** (RM) observations has been widely used as a single-epoch black …

As one paper in a series reporting on a large reverberation map** campaign of super-
Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs), we …

We have completed two years of photometric and spectroscopic monitoring of a large
number of active galactic nuclei (AGNs) with very high accretion rates. In this paper, we …