Broadband Photometric Reverberation Mapping Analysis on SDSS-RM and
  Stripe 82 Quasars
  We modified the broadband photometric reverberation mapping (PRM) code,
JAVELIN, and tested the availability to get broad line region (BLR) time delays
that are consistent with the spectroscopic reverberation mapping (SRM) project
SDSS-RM. The broadband light curves of SDSS-RM quasars produced by convolution
with the system trans- mission curves were used in the test. We found that
under similar sampling conditions (evenly and frequently sampled), the key
factor determining whether the broadband PRM code can yield lags consistent
with the SRM project is the flux ratio of the broad emission line to the
reference continuum, which is in line with the previous findings. We further
found a critical line-to-continuum flux ratio, about 6%, above which the mean
of the ratios between the lags from PRM and SRM becomes closer to unity, and
the scatter is pronouncedly reduced. We also tested our code on a subset of
SDSS Stripe 82 quasars, and found that our program tends to give biased lag
estimations due to the observation gaps when the R-L relation prior in Markov
Chain Monte Carlo (MCMC) is discarded. The performance of the damped random
walk (DRW) model and the power-law (PL) structure function model on broadband
PRM were compared. We found that given both SDSS-RM-like or Stripe 82-like
light curves, the DRW model performs better in carrying out broadband PRM than
the PL model.
