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Table 1.

IXPE observing log and measured X-ray polarization.

Epoch Obs. ID Date Orbital Phase IXPE Hardness State PD PA Exposure Time
4–8 keV/2–4 keV (%) (deg) (ks)
1 01002901 2022 May 15 0.00–1.00 0.569 H 4.0 ± 0.2 −21 ± 2 241.5
2 01250101 June 18 0.00–0.37 0.610 H 3.9 ± 0.3 −26 ± 3 86.0

3 02008201 2023 May 2 0.81–0.89 0.280 S 2.5 ± 0.4 −17 ± 5 20.8
4 02008301 May 9 0.97–0.09 0.271 S 2.4 ± 0.3 −23 ± 4 30.8
5 02008401 May 24 0.72–0.83 0.151 S 2.1 ± 0.3 −25 ± 4 24.6
6 02008501 June 13 0.31–0.43 0.210 S 1.5 ± 0.3 −26 ± 6 28.8
7 02008601 June 20 0.39–0.54 0.240 S 2.1 ± 0.2 −36 ± 3 34.2

8 03002201 2024 April 12 0.43–0.64 0.610 H 3.9 ± 0.5 −25 ± 4 55.8
9 03003101 May 6 0.79–0.99 0.589 H 3.1 ± 0.5 −28 ± 5 53.8
10 03010001 May 26 0.29–0.52 0.620 H 4.6 ± 0.5 −28 ± 3 57.5
11 03010101 June 14 0.80–0.01 0.649 H 4.6 ± 0.6 −33 ± 3 55.7
12 03002599a October 10 0.79–0.01 0.389 S 2.8 ± 0.3 −18 ± 3 55.1
13 03002599a December 12 0.19–0.42 0.280 S 2.8 ± 0.2 −25 ± 3 56.2

Notes. aObservations 12 and 13 were parts of one observation ID 03002599, which was then manually split into two parts.

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