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Post-flare formation of the accretion stream and a dip in pulse profiles of LMC X-4

Paul, Biswajit; Beri, Aru

We report here a pulse profile evolution study of an accreting X-ray pulsar LMC X-4 during and after the large X-ray flares using data from the two observatories XMM-Newton and RXTE. During the flares, the pulse profiles were found to have a significant phase offset in the range of 0.2-0.5 compared to the pulse profiles immediately before or after…

X-ray and optical orbital modulation of EXO 0748-676 : A co-variability study using XMM-Newton

Paul, Biswajit; Raman, Gayathri

We present a multi-wavelength timing study of the eclipsing low mass X-ray binary EXO 0748-676 (UY Vol) using XMM-Newton when the source was in a hard spectral state. The orbital optical and X-ray light curves show a fairly large amount of intensity modulation in the 7 observations taken during September-November, 2003, covering 36 complete binary…