| Authors : | A.Raghunathan, K.B.Raghavendra, Keerthipriya Satish, Arasi Sathyamurthy, Sandhya, Vinod K.R, Nagaraj H.N, Vinutha C, Kamini P.A, Madhavi S, Srivani K.S, Girish B.S, Vishakha Pandharpure, Avinash Deshpande, Shiv Sethi |
| Abstract : | The low frequency radio telescope is a new initiative undertaken by the Raman Research Institute (RRI) for exploring the radio sky at low frequencies. Transient sky till date, has remained almost unexplored and is expected to open up a new dimension of astronomical exploration. For detecting transients routinely over large volume of space at frequencies below 300 MHz, there does not seem to exist anywhere in the world an optimized setup with required sensitivity. In this context, a radio telescope is being planned by RRI to be built to operate in the frequency range of 30-360 MHz. It is expected to have i) a large instantaneous bandwidth of about 175 MHz and wide field coverage of 2π Sr. We describe in this talk, the design of a wide band radio receiver system consisting of i) frequency independent broadband antennas ii) compact analog beam former. iii) a high dynamic range front end receiver and iv) a 1024 channel precision spectrometer, along with their performance characteristics. We also present the initial results obtained on the sky after deploying the telescope in the field. |
