Fig. 2.
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nustar light curve (left panel) and CCD (right panel) of 4U 1624–49. The soft and hard colors are defined by Eqs. (1) and (2). The gray region corresponds to the dip. The blue region in the light curve highlights the motion of the source along the upper banana branch, corresponding to the points in the upper right part of the CCD diagram. Each bin corresponds to 120 s.
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