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Proceedings Paper

Acousto-optical pulsar processor usage for interstellar medium dispersion measurements
Author(s): Nelli A. Esepkina; Aleksandr P. Lavrov; Sergey A. Molodyakov
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Paper Abstract

The acousto-optical processor (AOP) of a new type for the investigation of pulsar radio emission is proposed that provides for the compensation of signal dispersion in a wide frequency bandwidth. The AOP is based on an acousto-optical spectrum analyzer with a CCD photodetector operating in a special pipeline operational mode (shift-and-add mode), which allows spectral components of the input signal to be added with a controlled time delay immediately in the CCD photodetector. The proposed AOP was successfully used on an RT-64 radio telescope (Kalyazin Radio Astronomy Observatory FIAN) for the observation of pulsars at 1.4 GHz band with bandwidth 45 MHz. The method of direct interstellar medium dispersion measurement on two-frequency band observations with application AOP is described. The measurements of DM for pulsar PSR 1937 + 21 are submitted.

Paper Details

Date Published: 16 February 2005
PDF: 8 pages
Proc. SPIE 5447, Lasers for Measurements and Information Transfer 2004, 54470X (16 February 2005); doi: 10.1117/12.610469
Show Author Affiliations
Nelli A. Esepkina, St. Petersburg State Polytechnical Univ. (Russia)
Aleksandr P. Lavrov, St. Petersburg State Polytechnical Univ. (Russia)
Sergey A. Molodyakov, St. Petersburg State Polytechnical Univ. (Russia)

Published in SPIE Proceedings Vol. 5447:
Lasers for Measurements and Information Transfer 2004
Vadim E. Privalov, Editor(s)

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