8 papers · 1 filter
Spectral structure of X-shaped radio sources
Dharam Vir Lal, A. Pramesh Rao
Analysis of Giant Metrewave Radio Telescope low frequency data for an X-shaped source, 3C 223.1 has revealed an unusual result as discussed earlier by Lal & Rao (2004, MNRAS in pre…
3C 223.1: A source with unusual spectral properties
Dharam Vir Lal, A. Pramesh Rao
Analysis of Giant Metrewave Radio Telescope low frequency data for an X-shaped source, 3C 223.1 has revealed an unusual result. The radio morphologies of it at 240 and 610 MHz show…
Low Frequency Observations of a Head-Tail Radio Source
Dharam Vir Lal, A. Pramesh Rao
We have mapped the head-tail radio galaxy, 3C 129 at 240 and 610 MHz using the GMRT and studied the detailed morphology and spectral index variations in this object. This is the fi…
GMRT radio observations of microquasar GRS 1915+105
J. S. Yadav, C. H. Ishwara-Chandra, A. Pramesh Rao +1
We have observed microquasar GRS 1915+105 at 1.28 GHz for 8 days from June 18 to July 1, 2001 using Giant Metrewave Radio Telescope (GMRT). We have seen several isolated radio baby…
Optical and Radio observations of the bright GRB010222 afterglow: evidence for rapid synchrotron cooling?
R. Sagar, C. S. Stalin, D. Bhattacharya +8
We report photometric observations of the optical afterglow of GRB010222 in V,R and I passbands carried out at UPSO, Naini Tal between 22-27 Feb 2001. We determine CCD Johnson BV a…
Small-scale structures in Compact Steep-Spectrum and GHz-Peaked-Spectrum radio sources
S. Jeyakumar, D. J. Saikia, A. Pramesh Rao +1
We determine the small-scale structure for a large sample of Compact Steep Spectrum (CSS) and Gigahertz Peaked Spectrum (GPS) sources and a sample of larger radio sources at 327 MH…