Detection of quasars in the time domain
  The time domain is the emerging forefront of astronomical research with new
facilities and instruments providing unprecedented amounts of data on the
temporal behavior of astrophysical populations. Dealing with the size and
complexity of this requires new techniques and methodologies. Quasars are an
ideal work set for developing and applying these: they vary in a detectable but
not easily quantifiable manner whose physical origins are poorly understood. In
this paper, we will review how quasars are identified by their variability and
how these techniques can be improved, what physical insights into their
variability can be gained from studying extreme examples of variability, and
what approaches can be taken to increase the number of quasars known. These
will demonstrate how astroinformatics is essential to discovering and
understanding this important population.
