Millisecond Pulsar Timing Observations at CRL

Details Millisecond Pulsar Timing Observations at CRL Millisecond Pulsar Timing Observations at CRL

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001crlj...48..135h&link_type=abstract

Journal of the Communications Research Laboratory. Special Issue: Large Aperture Radio Telescopes at Kashima Space Research Cent

Physics

Optics

Pulsars, Clocks, Digital Systems, Ultrahigh Frequencies, Spectrometers, Real Time Operation, Acousto-Optics, Broadband, Construction

Scientific paper

Millisecond pulsars are attractive as future reference clocks, because of their highly stable pulse timing. Communications Research Laboratory (CRL) aims to apply millisecond pulsars to the construction of a new time scale, and have developed a millisecond pulsar observation system using the 34 in antenna at Kashima Space Research Center. Since the 34 in antenna is rather small for the receiving of weak signals from millisecond pulsars, we had to develop a highly sensitive observation system. This system is equipped with an acousto-optic spectrometer (AOS) for wide-band observations, and a special digital processor for performing numerous pulse integrations in real time. Using this system, we have started weekly observation of PSR1937+21 at the 34 m antenna in S-band since November 1997. The residuals of pulse phases for two years show some drift, and more precise timing analysis is required. Current observation precision is 2.9 microns for one day's observation, which shows that the 34 in antenna's performance is enough for the highly precise timing measurement of the weak pulse signals from millisecond pulsars.

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