Study of Classical Be stars in open clusters older than 100 Myr
  We performed the slitless spectroscopic survey to identify Classical (CBe)
stars in open clusters older than 100 Myr. Observing a sample of 71 open
clusters, we identified 13 CBe stars in 11 open clusters, one of, which (TYC
2679-432-1) is a new detection. The 13 CBe stars show both H$\alpha$ in
emission and IR excess, which confirm that they possess gaseous circumstellar
discs. Two more CBe stars are found to exhibit H$\alpha$ in absorption for the
first time, indicating that might be passing through disc-less episode
presently. The spectral type estimation is done for all these 15 stars and it
is noticed that they belong to B0.5 -- B8 type. Moreover, we found that the
distribution of our sample is peaking near late B-types as expected.
