1. 1. Aryabhatta Research Institute of observational sciencES (ARIES), Manora peak, Nainital, Uttarakhand, India, PIN : 263001 (amar@aries.res.in). 2. Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttarpradesh, India, PIN: 273009.
2. 1. Aryabhatta Research Institute of observational sciencES (ARIES), Manora peak, Nainital, Uttarakhand, India, PIN: 263001. 2. Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttarpradesh, India, PIN: 273009.
3. 1. Aryabhatta Research Institute of observational sciencES (ARIES), Manora peak, Nainital, Uttarakhand, India, PIN: 263001. 2. Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India, PIN: 492010.
4. 1. Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008, Granada, Spain. 2. Unidad Asociada Departamento de Ingeniería de Sistemas y Automática, E.T.S. de Ingenieros Industriales, Universidad de Málaga, Spain.
5. Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttarpradesh, India, PIN: 273009.