  The Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) program monitors
849 active galactic nuclei (AGN) both spectroscopically and photometrically.
The photometric observations used in this work span over four years and provide
an excellent baseline for variability studies of these objects. We present the
photometric light curves from 2014 to 2017 obtained by the Steward
Observatory's Bok telescope and the CFHT telescope with MegaCam. We provide
details on the data acquisition and processing of the data from each telescope,
the difference imaging photometry used to produce the light curves, and the
calculation of a variability index to quantify each AGN's variability. We find
that the Welch-Stetson J-index provides a useful characterization of AGN
variability and can be used to select AGNs for further study.
