UV and X-ray pulse amplitude variability in the transitional millisecond pulsar PSR J1023+0038

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Table 2

Summary of the best times of the ascending node passage obtained from folding the XMM-Newton and HST time series by varying the T_asc.

Obs. ID	Obs. start	Best T_asc [MJD]	Best Ps [ms]
XMM-Newton

0864010101	Jun. 3, 2021	59 368.0910979(27)	1.68798744494(51)
0803620501	Jun. 13, 2017	57 917.431286(12)	1.6879874534(51)
0742610101	Jun. 10, 2014	56 818.1948362(24)	1.68798744496(24)

Hubble Space Telescope

16061	Jun. 4, 2021	59 368.091163(33)	1.687987321(69)
14934	Jun. 13, 2017	57 917.431293(79)	1.687987472(44)
13630	Apr. 27, 2014	56 774.6136468(24)^(*)	–

Notes. In the last column we report the best value of the rotational period obtained by the phase fitting technique or by fitting the EFS periodograms with a Gaussian. ^(*)Value propagated by the closest X-ray ephemeris (Obs. ID 0742610101).

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