Fig. 1.
Light curve of the source as observed by NuSTAR in 3–10 keV (red) and 20–40 keV (blue) bands (top, both units combined, one bin per pulse), and the ratio of the two (black points). Bottom panel: part of the light curve of the source in the 3–10 keV (red) and 20–40 keV (blue) bands. Strong pulsations with a period of ∼200 s are observed throughout the full energy range.
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