Query : 2001A&A...373..236V

2001A&A...373..236V - Astronomy and Astrophysics, volume 373, 236-240 (2001/7-1)

RXTE observations of single pulses of PSR B0531+21. I. Flux variations.


Abstract (from CDS):

This article is the first in the series that analyze about 1.87 million periods of PSR B0531+21 (Crab pulsar), observed by the PCA detector aboard the RXTE X-ray observatory. The Crab pulsar's X-ray light curve shows little variation over time scales ranging from days to a period (33.46 milliseconds). The standard deviation of its X-ray flux variation is ≃0.7% of its mean value, which is negligible compared to its radio flux variations. The phase resolved power spectrum of pulse to pulse X-ray flux variation shows no spectral feature; an upper limit to the peak of any possible broad spectral feature is 0.06% of the mean power. The X-ray fluxes in the two components of its integrated profile are unrelated to each other; their linear correlation coefficient is 0.0004±0.0010. ``Giant pulses'' that are routinely seen at radio wavelengths are absent here. This work sets very strong constraints on the connection (if any) between the flux variations at radio and X-ray energies, for example due to variation in the degree of coherence of the basic emitters. Its phase resolved X-ray flux variation shows a weak correlation with the integrated profile. If confirmed, this might be an important clue to understanding the X-ray emission mechanism of Crab pulsar.

Abstract Copyright:

Journal keyword(s): pulsars - individual: PSR B0531+21 - X-ray: stars

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 1 SNR 05 34 30.7 +22 01 27           ~ 6020 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5117 0

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