Long-term stability of pulsed X-ray emission from the Crab pulsar

Details Long-term stability of pulsed X-ray emission from the Crab pulsar Long-term stability of pulsed X-ray emission from the Crab pulsar

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...443..271s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 443, no. 1, p. 271-273

Astronomy and Astrophysics

Astronomy

8

Crab Nebula, Long Term Effects, Pulsars, Pulsed Radiation, Stability, X Ray Astronomy, Constraints, Emission Spectra, Gamma Rays, Pulse Amplitude, Variations

Scientific paper

Two pulsed X-ray profiles of the Crab pulsar taken at a 4.5 yr interval have been compared to study possible long-term variabilities in its pulse intensity and pulse profile. The intensity ratio of the second peak to the first peak remained constant within 2.7% in our study in the X-ray band, while the ratio has been reported to have varied by a factor around 3 over the same interval in the gamma-ray band. Our results give constraints on possible origins of the reported variation in the gamma-ray band for the Crab pulsar. The results also set a limit on possible change in its pulsed X-ray emission after the 1989 glitch.

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