The OPD Photometric Survey of Open Clusters II. robust determination of
  the fundamental parameters of 24 open clusters
  In the second paper of the series we continue the investigation of open
cluster fundamental parameters using a robust global optimization method to fit
model isochrones to photometric data. We present optical UBVRI CCD photometry
(Johnsons-Cousins system) observations for 24 neglected open clusters, of which
14 have high quality data in the visible obtained for the first time, as a part
of our ongoing survey being carried out in the 0.6m telescope of the Pico dos
Dias Observatory in Brazil. All objects were then analyzed with a global
optimization tool developed by our group which estimates the membership
likelihood of the observed stars and fits an isochrone from which a distance,
age, reddening, total to selective extinction ratio $R_{V}$ (included in this
work as a new free parameter) and metallicity are estimated. Based on those
estimates and their associated errors we analyzed the status of each object as
real clusters or not, finding that two are likely to be asterisms. We also
identify important discrepancies between our results and previous ones obtained
in the literature which were determined using 2MASS photometry.
