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Fig. 8


Bolometric light curve of SMC X-3 as seen by the Swift/XRT telescope obtained during the giant outburst in 2016–2017, type I outbursts in September–October 2010, August–November 2012 and March 2014 are shown with black circles, red circles, green squares and blue triangles, respectively. The Chandra measurement from April 2006 is represented by a magenta square. The 3σ upper limits are shown with arrows of the corresponding color. The historical data were shifted by an integer number of the orbital periods obtained in the current work (see Table 1) for illustrative purpose. The luminosity is calculated from the unabsorbed flux under assumption of the distance to the source d = 62 kpc and bolometric correction factors from Fig. 1. The horizontal dashed lines show the upper and lower limits for the threshold luminosity for the propeller regime onset (see the text). Green vertical dotted lines correspond to the times of the periastron passages.

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