Experimental Set-Up for Detecting Very Fast and Dispersed Millisecond Pulsars |
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| Authors: | B Rougeaux G Petit T Fayard E Davoust |
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| Institution: | (1) BIPM, Pavillon de Breteuil, F-92312 Sèvres, France;(2) Present address: National Physical Laboratory (NPL), Teddington, Middlesex, UK;(3) Present address: BIPM, Pavillon de Breteuil, F-92312 Sèvres, France;(4) CNES, 18 Av. E. Belin, F-31055 Toulouse, France;(5) OMP, 14 Av. E. Belin, F-31000 Toulouse, France |
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| Abstract: | We have developed observational and data processingtechniques for detecting millisecond pulsars. Themethod of data processing consists in correlating timeseries of data by folding them in two steps accordingto a trial period. While very time consuming,especially for very short periods, this methods allowsus in principle to detect very fast and dispersedmillisecond pulsars. The experimental set-up has beenintegrated into a data acquisition system developed atCentre national d'études spatiales (CNES).Observations of known millisecond pulsars atNançay radio observatory are used to validate thesystem and assess the sensitivity of the survey, whichis 3.5 mJy for 240 sec of integration. Futureimprovements in the radio-telescope and the systemshould bring it down to below 1 mJy. The applicationof the method to a millisecond pulsar survey is underway at Nançay radio observatory in collaborationbetween the Bureau international des poids et mesure(BIPM), Observatoire Midi-Pyrénées (OMP), and CNES. |
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| Keywords: | data processing technique instrumentation millisecond pulsars radio astronomy survey |
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