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We performed the slitless spectroscopic survey to identify Classical (CBe)stars in open clusters older than 100 Myr. Observing a sample of 71 openclusters, we identified 13 CBe stars in 11 open clusters, one of, which (TYC2679-432-1) is a new detection. The 13 CBe stars show both H$\alpha$ inemission and IR excess, which confirm that they possess gaseous circumstellardiscs. Two more CBe stars are found to exhibit H$\alpha$ in absorption for thefirst time, indicating that might be passing through disc-less episodepresently. The spectral type estimation is done for all these 15 stars and itis noticed that they belong to B0.5 -- B8 type. Moreover, we found that thedistribution of our sample is peaking near late B-types as expected.

Study of Classical Be stars in open clusters older than 100 Myr