Correlation between X-ray flux and rotational acceleration in VELA X-1

Details Correlation between X-ray flux and rotational acceleration in VELA X-1 Correlation between X-ray flux and rotational acceleration in VELA X-1

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989uwsa.rept.....d&link_type=abstract

Final Technical Report Washington Univ., Seattle. Dept. of Astronomy.

Astronomy and Astrophysics

Astronomy

Pulsars, Stellar Mass Accretion, Stellar Radiation, Stellar Rotation, X Ray Binaries, Angular Acceleration, Correlation Coefficients, Flux (Rate), Mathematical Models, Statistical Analysis, X Rays

Scientific paper

The results of a search for correlations between X-ray flux and angular acceleration for the accreting binary pulsar Vela X-1 are presented. Results are based on data obtained with the Hakucho satellite during the interval 1982 to 1984. In undertaking this correlation analysis, it was necessary to modify the usual statistical method to deal with conditions imposed by generally unavoidable satellite observing constraints, most notably a mismatch in sampling between the two variables. The results are suggestive of a correlation between flux and the absolute value of the angular acceleration, at a significance level of 96 percent. The implications of the methods and results for future observations and analysis are discussed.

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