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Table 4.
Properties of the X-ray and optical pulses.
| Telescope/Instrument | Tref (MJD) | ϕ1 | ϕ2 | r1 (%) | r2 (%) | R (%) |
|---|---|---|---|---|---|---|
| 2017 May – overlap: 11.0 ks | ||||||
| XMM-Newton/EPIC | 57896.0 | 0.340(18) | 0.4346(39) | 3.34(39) | 7.69(38) | 8.38(38) |
| TNG/SiFAP2 | 57896.0 | 0.4726(53) | 0.5500(23) | 0.391(13) | 0.449(13) | 0.595(13) |
| 2018 December, 11-12 – overlap: 10.8 ks | ||||||
| XMM-Newton/EPIC | 58463.0 | 0.474(24) | 0.1177(42) | 2.01(32) | 5.86(31) | 6.29(31) |
| Copernicus/Aqueye+ | 58463.0 | 0.564(29) | 0.164(14) | 0.145(48) | 0.159(48) | 0.215(48) |
| 2018 December, 15 – temporal gap: 41 ks(*) | ||||||
| XMM-Newton/EPIC | 58467.0 | 0.256(34) | 0.4271(43) | 1.30(28) | 5.11(28) | 5.27(28) |
| Copernicus/Aqueye+ | 58467.0 | 0.315(23) | 0.434(16) | 0.167(39) | 0.128(39) | 0.210(39) |
| 2019 January – overlap: 2.3 ks | ||||||
| NICER | 58514.0 | 0.048(34) | 0.1665(78) | 2.78(61) | 6.12(60) | 6.72(60) |
| TNG/SiFAP2 | 58514.0 | 0.153(98) | 0.197(20) | 0.30(17) | 0.70(17) | 0.76(17) |
| 2019 February – overlap: 1.1 ks | ||||||
| NICER | 58519.0 | 0.288(26) | 0.3831(76) | 3.01(50) | 5.12(49) | 5.94(49) |
| Copernicus/Aqueye+ | 58519.0 | 0.385(32) | 0.534(16) | 0.122(60) | 0.118(59) | 0.170(60) |
| 2019 June – overlap: 340 s(*) | ||||||
| NICER | 58636.0 | 0.560(87) | 0.353(16) | 2.6(1.3) | 6.8(1.3) | 7.3(1.3) |
| TNG/SiFAP2 | 58636.0 | 0.775(42) | 0.426(13) | 0.085(22) | 0.139(22) | 0.163(22) |
| 2020 January – overlap: 4.6 ks | ||||||
| NICER | 58878.0 | 0.171(56) | 0.234(12) | 2.77(98) | 6.53(96) | 7.09(96) |
| TNG/SiFAP2 | 58878.0 | 0.1917(55) | 0.2823(23) | 0.2651(95) | 0.3286(95) | 0.4222(95) |
| 2020 January – overlap: 520 s | ||||||
| NICER | 58878.0 | 0.207(65) | 0.221(12) | 3.9(1.5) | 10.1(1.6) | 10.8(1.6) |
| Copernicus/Aqueye+ | 58878.0 | 0.204(30) | 0.292(14) | 0.240(57) | 0.256(57) | 0.351(57) |
| 2022 January – overlap: 1.7 ks | ||||||
| NICER | 59607.0 | 0.058(75) | 0.717(10) | 1.19(55) | 4.13(54) | 4.30(54) |
| Copernicus/Aqueye+ | 59607.0 | 0.031(82) | 0.781(19) | 0.064(57) | 0.135(57) | 0.149(57) |
Notes. (*)Cases in which it was not possible to analyze exactly simultaneous intervals between optical and X-ray observations.
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