Crab Pulsar Photometry and the Signature of Free Precession

Details Crab Pulsar Photometry and the Signature of Free Precession Crab Pulsar Photometry and the Signature of Free Precession

2003-03-17

arxiv.org/abs/astro-ph/0303369v1

2001 A&A, 366, 930C

Astronomy and Astrophysics

Astrophysics

6 pages, 7 figures. Published in A&A

Scientific paper

10.1051/0004-6361:20000283

Optical photometry for the pulsar PSR0531+21 has been extended with new
observations that strengthen evidence for a previously observed 60 seconds
periodicity. This period is found to be increasing with time at approximately
the same rate as the rotational period of the pulsar. The observed period and
its time dependence fit a simple free precession model.

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