SRG/ART-XC, Swift, NICER, and NuSTAR study of different states of the transient X-ray pulsar MAXI J0903–531

The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG mission

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Fig. 2

Spin history of the source as observed by Fermi/GBM (blue dots), NICER (black squares), and NuSTAR (red diamonds). The final model including the intrinsic spin frequency variations (red) and those due to the orbital motion (blue) together with the best-fit residuals (lower panel) are also shown.

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