Fast time optical variability in Be/X-ray binaries - Pulsation and rotation

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Table 2.

Stable signals.

System	Frequency	Period	Epochs
	(c d⁻¹)	(h)
4U 0115+63	3.33	7.2	2008,2009,2018,2020
4U 0115+63	1.7	14.1	2009,2018
RX J0146.9+6121	2.9, 9.7	8.3, 2.5	2005–07,2018
X Per	3.61, 3.83	6.6, 6.3	2019,2021
RX J0812.4–3114	2.88	8.3	2019,2021
GRO 1008–57	2.98, 10.19	8.05, 2.35	2019,2021
RX J1037.5–5647	0.31, 4.91, 5.64	77.4, 4.89, 4.26	2019,2021
1A 1118–616	0.93, 3.24, 4.42, 6.53	25.8, 7.4, 5.4, 3.7	2019,2021
4U 1145–61	2.16, 4.57, 8.65	11.1, 5.25, 2.77	2019,2021
GRO J2058+42	2.37	10.13	2005,2019
SAX J2239.3+6116	0.73	32.9	2019,2020
SAX J2239.3+6116	1.93	12.4	2011,2020

Notes. This table gives the frequencies and periods of signals that are detected at two or more different epochs. Errors in frequency and period are typically ≲0.01 c d⁻¹ and ≲0.05 h, respectively (see Tables C.1 and C.2).

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