Some basic concepts in use for making astronomical observations at radio wavelengths are introduced. In particular the importance of phase information for imaging in radio astronomy is highlighted. Using simple examples ...

The time series of solar radio emission at 2.8 GHz is analysed using correlation methods. The analysis showed that this type of time series can be used to infer the rotation period of the source (in this case solar corona). ...

The radio emission from a few binary systems is discussed. RS CVn stars, the Algol-type systems CC Cassiopeae, AR Lacertae, Beta Persei, and the X-ray emitting radio stars Cygnus X-3 and Sco X-1 are considered. A brief ...

By attributing the often seen longitude offsets between the core and conal component centres of pulsar radio pulses to different emission altitudes, we present a new method for investigating these altitudes. OUf method ...

Some recently discovered properties of the radio source 4C - 05.93 are summarised. Their relevance to the observed absorption-line spectrum of the QSO PHL 5200, which is located onl 1 arcmin away from the radio source, is ...

Multi-frequency observations of two radio bright SNe (SN1993J, SN1979C) carried out over a year with GMRT are presented. Their radio light curves trace the evolution of the mass loss in the stellar wind before the pre-supernova ...

The central region of our milky way Galaxy still eludes a comprehensive understanding. With new observations. however. we are being able to know many of the observable properties of the sources, which allow us to better ...