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Fig. 1
RGS light curves of Vela X-1 during the observation discussed in this paper. Time on the abscissa are from the beginning of the observations (MJD 53 880.439). The dashed lines show thepre-, during and post-flare phases. We use the time of mean longitude of 90 degrees, T90, from Kreykenbohm et al. (2008) as phase zero.
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