One of us (SKP) is Senior Associate of IUCAA and he expresses his sincere thanks to Professor J. V. Narlikar, Director, IUCAA for providing support and facilities which made this study possible. We are thankful to the time allocation committee, VBO, Kavalur for providing us observing time and the observatory staff for their generous support during observations. We express our sincere thanks to Dr. N. Brosch who referred the paper and offered his critical comments. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Aeronautics and Space Administration.
© European Southern Observatory (ESO) 1998
Online publication: April 28, 1998