Simultaneous Optical and Radio Observations of NP 0532

Details Simultaneous Optical and Radio Observations of NP 0532 Simultaneous Optical and Radio Observations of NP 0532

May 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969natur.222..552c&link_type=abstract

Nature, Volume 222, Issue 5193, pp. 552-553 (1969).

Physics

9

Scientific paper

SIMULTANEOUS optical and radio observations of the Crab Nebula pulsar, NP 0532, were obtained at Lick Observatory and Stanford University on March 13 and 15. The exact mechanisms for the radio arid optical emissions are still not clear, but the detection of a time interval (if any) between the optical and radio pulses would be an important test of the various emission theories1,2. Our data show, after correction for interstellar dispersion, that the optical and radio pulses are emitted simultaneously with a time uncertainty of +/- 6 ms resulting almost entirely from the uncertainty in the value of the interstellar dispersion. The measured time delay before correction is accurate to approximately 250 µs.

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