New Open Cluster Candidates Discovered in the XSTPS-GAC Survey
  The Xuyi Schmidt Telescope Photometric Survey of the Galactic Anti-center
(XSTPS-GAC) is a photometric sky survey that covers nearly 6 000 deg^2 towards
Galactic anti-center in g r i bands. Half of its survey field locates on the
Galactic Anti-center disk, which makes XSTPS-GAC highly suitable for searching
new open clusters in the GAC region. In this paper, we report new open cluster
candidates discovered in this survey, as well as properties of these open
cluster candidates, such as age, distance and reddening, derived by isochrone
fitting in the color-magnitude diagram (CMD). These open cluster candidates are
stellar density peaks detected in the star density maps by applying the method
from Koposov et al. (2008). Each candidate is inspected on its true color image
composed from XSTPS-GAC three band images. Then its CMD is checked, in order to
identify whether the central region stars have a clear isochrone-like trend
differing from the background stars. The parameters derived from isochrone
fitting for these candidates are mainly based on three band photometry of
XSTPS-GAC. Meanwhile, when these new candidates are able to be seen clearly on
2MASS, their parameters are also derived based on 2MASS (J-H, J) CMD. Finally,
there are 320 known open clusters rediscovered and 24 new open cluster
candidates discovered in this work. Further more, the parameters of these new
candidates, as well as another 11 known recovered open clusters, are properly
determined for the first time.
