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Binary corrected X-ray light curve of Cygnus X-3 : implications for the timing properties of the compact binary system

M. Choudhury·A. R. Rao·S. V. Vadawale·A. K. Jain·N. S. Singh
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Abstract

We study the binary corrected X-ray light curve of Cygnus X-3 using the RXTE-ASM data and RXTE-PCA data. We find that the X-ray template derived from the EXOSAT observations adequately explains the binary variations. Using the recently determined quadratic binary ephemeris we correct the RXTE-PCA lightcurve and obtain the power spectrum which shows distinct features of shifting towards the low frequency regime vis-a-vis the Galactic X-ray binaries. The power spectrum doesn't vary from the hard to the soft state. We also obtain the binary corrected RXTE-ASM monitoring lightcurve and examine the previously obtained correlation between soft X-ray (2-12 keV from RXTE-ASM), hard X-ray (20-100 keV from CGRO-BATSE) and radio (2.2 GHz from GBI) after the binary correction. We find that the correlation time scale is less than a day.

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M. Choudhury, A. R. Rao, S. V. Vadawale, A. K. Jain, N. S. Singh. 2004-03-22. Binary corrected X-ray light curve of Cygnus X-3 : implications for the timing properties of the compact binary system. https://doi.org/10.1051/0004-6361%3A20040110

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