2.Data used and reduction procedures
Due to the unavailability of all the required data in one general catalogue for the present study, we have compiled data from different sources.
We have taken photometric data from 2MASS catalogue ( Cutri et al., 2003 ).
2MASS uniformly scanned the entire sky in three near-infrared bands ( J , H , K s ) to detect and characterize point sources brighter than 1 mJy in each band, with
signal-to -noise ratio (SNR) greater than 10, using a pixel size of 2 .0.