Title:	RRI-GBT multi-band receiver: motivation, design, and development
Authors:	Maan, Yogesh Deshpande, A.A. Chandrashekar, V. Chennamangalam, J. Rao, B.K.R. Somashekar, R. Anderson, Gray Ezhilarasi, M.S. Sujatha, S. Kasturi, S. Sandhya, P. Bauserman, Jonah Duraichelvan, R. Amiri, Shahram Aswathappa, H.A. Barve, Indrajit V. Sarabagopalan, G. Ananda, H.M. Dhamnekar, D.B. Raja, Wasim Sahasrabudhe, Harshad Srivani, K.S. Venugopal, H.V. Viswanathan, S.T. +8 Co-authors
Keywords:	Instrumentation Polarimeters Pulsars
Issue Date:	Jan-2013
Publisher:	American Astronomical Society
Citation:	Astrophysical Journal Supplement, 2013, Vol.204, p1
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.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5574
ISSN:	0067-0049 1538-4365(Online)
Alternative Location:	http://adsabs.harvard.edu/abs/2013ApJS..204...12M http://arxiv.org/abs/1210.2573 http://dx.doi.org/10.1088/0067-0049/204/1/12
Copyright:	2013 American Astronomical Society
Appears in Collections:	Research Papers (A&A)

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