Institution: | Yellapragada Ravi Kiron1,Kandulapati Sriram2 and Pasagada Vivekananda Rao1 1 Department of Astronomy,Osmania University,Hyderabad 500 007,India 2 Korea Astronomy and Space Science Institute,Hwaam 61-1,Yuseong,Daejeon 305-348,Republic of Korea |