tokens: We thank the anonymous referee for valuable comments which further improved the quality of the paper. This research work is financially supported by S N Bose National Centre for Basic Sciences under Department of Science and Technology, Govt. of India. This publication makes use of data from The UKIRT Infrared Deep Sky Survey or UKIDSS which is a next generation near-IR sky survey using the wide field camera (WFCAM) on the United Kingdom Infrared Telescope on Mauna Kea in Hawaii. We also use data from Two-micron All-Sky Survey (2MASS), which is a joint project of the University of Massachusetts and Infrared Processing and Analysis Center/California Institute of Technology, funded by National Aeronautics and Space Administration and the National Science Foundation. This paper uses data observations made with the Spitzer Space Telescope , which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. The authors are thankful to the HTAC members and staff of HCT, operated by Indian Institute of Astrophysics (Bangalore); JTAC members and staff of 1.04 m Sampurnanand telescope operated by Aryabhatta Research Institute of Observational Sciences (Nainital).
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