The role of gravitational lenses as valuable tools for astrophysics and cosmology is highlighted. The importance of studying gravitational lens systems for inferring the nature and distribution of gravitating matter, both ...

Physical Research Laboratory (PRL) has two radio telescopes operating at 103 MHz. The telescopes are situated at Thaltej and Rajkot. This article briefly describes the various sub-systems of these telescopes. There has ...

We present a solution of magnetohydrostatic equations after including the effect of gravity. For low values of the parameters beta, there exist two solutions for the common boundary condition at the base of the corona. ...

Atmospheric extinction and background light measurements have been carried out at Jammora for the period 1991 October-November, with a view to evaluate its suitability as a site for our new ground-based gamma-ray observatory. ...