Fig. 5.
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Long-term X-ray light curves folded on the period derived from the Lomb-Scargle analysis. The left panel shows the RossiRXTE (2−12 keV) light curve extending from 1996 January to 2011 December. The right panel displays the Neil Gehrels Swift observatory (15−50 keV) light curve obtained between 2005 February and 2023 February. For ease of comparison, in both plots T0 = 50 000 (MJD) has been chosen.
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