RRI-GBT MULTI-BAND RECEIVER: MOTIVATION, DESIGN, AND DEVELOPMENT

Maan, Yogesh and Deshpande, Avinash A and Chandrashekar, Vinutha and Chennamangalam, Jayanth and Rao, Raghavendra KB and Somashekar, R and Anderson, Gary and Ezhilarasi, MS and Sujatha, S and Kasturi, S and Sandhya, P and Bauserman, Jonah and Duraichelvan, R and Amiri, Shahram and Aswathappa, HA and Barve, Indrajit V and Sarabagopalan, G and Ananda, HM and Beaudet, Carla and Bloss, Marty and Dhamnekar, Deepa B and Egan, Dennis and Ford, John and Krishnamurthy, S and Mehta, Nikhil and Minter, Anthony H. and Nagaraja, HN and Narayanaswamy, M and O'Neil, Karen and Raja, Wasim and Sahasrabudhe, Harshad and Shelton, Amy and Srivani, KS and Venugopal, HV and Viswanathan, Salna T (2013) RRI-GBT MULTI-BAND RECEIVER: MOTIVATION, DESIGN, AND DEVELOPMENT. In: ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 204 (1).

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Abstract

We report the design and development of a self-contained multi-band receiver (MBR) system, intended for use with a single large aperture to facilitate sensitive and high time-resolution observations simultaneously in 10 discrete frequency bands sampling a wide spectral span (100-1500 MHz) in a nearly log-periodic fashion. The development of this system was primarily motivated by need for tomographic studies of pulsar polar emission regions. Although the system design is optimized for the primary goal, it is also suited for several other interesting astronomical investigations. The system consists of a dual-polarization multi-band feed (with discrete responses corresponding to the 10 bands pre-selected as relatively radio frequency interference free), a common wide-band radio frequency front-end, and independent back-end receiver chains for the 10 individual sub-bands. The raw voltage time sequences corresponding to 16 MHz bandwidth each for the two linear polarization channels and the 10 bands are recorded at the Nyquist rate simultaneously. We present the preliminary results from the tests and pulsar observations carried out with the Robert C. Byrd Green Bank Telescope using this receiver. The system performance implied by these results and possible improvements are also briefly discussed.

Item Type:	Journal Article
Publication:	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copyright for this article belongs to IOP PUBLISHING LTD, ENGLAND
Keywords:	instrumentation:miscellaneous;instrumentation:polarimeters;methods:observational;pulsars:general;pulsars:individual (B0329+54, B0809+74)
Department/Centre:	Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited:	20 Feb 2013 08:33
Last Modified:	20 Feb 2013 08:33
URI:	http://eprints.iisc.ac.in/id/eprint/45820

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