Department of Physics & Centre of Theoretical StudiesIndian Institute of Technology KharagpurKharagpur, IndiaEmail : somnath@phy.iitkgp.ac.inI work in the areas of Astrophysics and Cosmology. My research is currently focused on using low frequency radio telescopes to study the high redshift universe using the redshifted 21-cm radiation from neutral hydrogen. We are involved in theoretical, computational and also observational work connected to this issue.