Multicolor Optical Photometry of the Crab Pulsar with 1 Microsecond Time Resolution

Details Multicolor Optical Photometry of the Crab Pulsar with 1 Microsecond Time Resolution Multicolor Optical Photometry of the Crab Pulsar with 1 Microsecond Time Resolution

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...19311204s&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #112.04; Bulletin of the American Astronomical Society, Vol. 30, p.1420

Astronomy and Astrophysics

Astronomy

4

Scientific paper

We have obtained simultaneous, multicolor optical photometry of the Crab pulsar at a time resolution of 1 microsecond, nearly a factor of 20 better than the best previous observations. The main pulse moves smoothly from the rising branch to the falling branch with neither a flat region nor a cusp at the top. The peak of the pulse in the optical arrives before the radio peak ( from Jordell Bank Crab Ephemeris ) by about 140 microseconds. The color of the emission changes during the pulse lightcurve but not significantly -- the maximum variation in the ratio of U to R band fluxes is about 20%. The pulsar has faded 3% since the observations of Crab pulsar using the same instrument, reported in Percival et. al. ( 1993, ApJ, 407, 276 ).

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