16 February 2005 Acousto-optical pulsar processor usage for interstellar medium dispersion measurements
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Proceedings Volume 5447, Lasers for Measurements and Information Transfer 2004; 54470X (2005); doi: 10.1117/12.610469
Event: Lasers for Measurements and Information Transfer 2004, 2004, St. Petersburg, Russian Federation
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.
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Nelli A. Esepkina, Aleksandr P. Lavrov, Sergey A. Molodyakov, "Acousto-optical pulsar processor usage for interstellar medium dispersion measurements", Proc. SPIE 5447, Lasers for Measurements and Information Transfer 2004, 54470X (16 February 2005); doi: 10.1117/12.610469; https://doi.org/10.1117/12.610469
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KEYWORDS
Charge-coupled devices

Photodetectors

Signal processing

Image stacking

Observatories

Radio astronomy

Radio telescopes

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