Table 1.
Log of the Swift and XMM-Newton observations of 4U 0115+63 used for the spectral analysis in this paper.
| Swift | |||||
|---|---|---|---|---|---|
| ObsID | Date | MJD | Exposure time | Count rate | ϕ |
| (ks) | (10−3 counts s−1) | ||||
| 2015/2016 campaign | |||||
| 000311720[30] | Nov 18 | 57344.1242 ± 0.0055 | ∼0.9 | 916 ± 63 | 0.65 |
| +[31] | " 19 | 57345.889 ± 0.037 | ∼1.9 | 60.4 ± 7.0 | 0.72 |
| +[32] | " 20 | 57346.18 ± 0.14 | ∼1.9 | 32.2 ± 5.8 | 0.73 |
| +[33] | " 21 | 57347.487 ± 0.038 | ∼2.1 | 20.5 ± 3.4 | 0.79 |
| +[34] | " 22 | 57348.549 ± 0.038 | ∼1.8 | 12.0 ± 2.9 | 0.83 |
| +[35] | " 23 | 57349.681 ± 0.039 | ∼2.3 | 20.6 ± 3.3 | 0.88 |
| +[36] | " 27 | 57353.894 ± 0.071 | ∼1.9 | 747 ± 31 | 0.05 |
| +[37] | Dec 5 | 57361.761 ± 0.069 | ∼2.1 | 16.2 ± 3.3 | 0.37 |
| +[38] | " 8 | 57364.589 ± 0.038 | ∼1.9 | 9.8 ± 2.5 | 0.49 |
| +[39] | " 11 | 57367.6193 ± 0.0063 | ∼1.1 | 9.5 |
0.61 |
| +[40] | " 12 | 57370.21 ± 0.14 | ∼1.5 | 9.4 |
0.72 |
| +[41] | " 25 | 57381.067 ± 0.032 | ∼1.9 | 12.6 ± 2.9 | 0.17 |
| +[42] | Jan 1 | 57388.782 ± 0.036 | ∼1.7 | 3.7 |
0.49 |
| +[43] | " 8 | 57395.49 ± 0.43 | ∼2.4 | 6.0 |
0.76 |
| +[44] | " 14 | 57401.60 ± 0.37 | ∼1.4 | 10.5 |
0.01 |
| +[46] | Apr 25 | 57503.37 ± 0.31 | ∼7.9 | 6.7 ± 1.1 | 0.19 |
| 2017/2018 campaign | |||||
| 000311720[63] | Sept 2 | 57998.055 ± 0.036 | ∼1.0 | 584 ± 32 | 0.54 |
| +[64] | " 5 | 58001.1290 ± 0.0056 | ∼1.0 | 16.6 |
0.67 |
| +[65] | " 8 | 58004.0566 ± 0.0058 | ∼1.0 | <13 | 0.79 |
| +[66] | " 11 | 58007.1832 ± 0.0049 | ∼0.8 | 13.2 |
0.92 |
| +[67] | " 14 | 58010.1701 ± 0.0055 | ∼0.9 | 54.4 ± 8.2 | 0.04 |
| +[68] | " 17 | 58013.121 ± 0.029 | ∼1.0 | 5.0 |
0.16 |
| +[70] | " 27 | 58023.1072 ± 0.0031 | ∼0.5 | 5.3 |
0.57 |
| +[71] | Oct 4 | 58030.9343 ± 0.037 | ∼1.1 | 3.4 |
0.89 |
| +[72] | " 9 | 58035.0880 ± 0.0056 | ∼0.9 | 3.9 |
0.06 |
| +[73] | " 23 | 58049.060 ± 0.035 | ∼1.8 | 3.3 |
0.64 |
| +[74] | Nov 6 | 58063.40 ± 0.23 | ∼2.7 | 8.1 ± 2.1 | 0.23 |
| +[75] | Dec 4 | 58091.373 ± 0.040 | ∼2.8 | 1.38 |
0.38 |
| +[77] | " 25 | 58112.82 ± 0.17 | ∼2.4 | 5.0 |
0.26 |
| +[78] | Jan 3 | 58121.912 ± 0.038 | ∼1.2 | 3.6 |
0.63 |
| +[79] | " 17 | 58135.48 ± 0.43 | ∼0.9 | 26.2 ± 6.2 | 0.19 |
| +[80] | " 20 | 58138.5689 ± 0.0074 | ∼1.3 | 4.8 |
0.32 |
| +[81] | " 24 | 58142.587 ± 0.033 | ∼1.2 | 3.7 |
0.48 |
| +[83] | Feb 8 | 58157.66 ± 0.24 | ∼1.9 | 23.5 ± 4.4 | 0.10 |
| +[84] | " 10 | 58159.249 ± 0.035 | ∼2.1 | 5.5 |
0.17 |
| +[85] | " 12 | 58161.046 ± 0.039 | ∼2.3 | 2.3 |
0.24 |
| +[86] | " 14 | 58163.039 ± 0.037 | ∼2.0 | 2.8 |
0.32 |
| +[87] | " 16 | 58165.13 ± 0.13 | ∼1.8 | 4.2 |
0.41 |
| XMM-Newton | |||||
| 0505280101 | 2007 Jul 21 | 54302.24 ± 0.17 | ∼7, ∼16, ∼16 | 13.0 ± 1.5, 3.43 ± 0.55, 3.75 ± 0.56 | 0.45 |
| 0790180301 | 2016 Feb 17 | 57435.61 ± 0.29 | ∼15, ∼28, ∼29 | 24.8 ± 1.3, 8.21 ± 0.57, 10.10 ± 0.62 | 0.41 |
| 0804940201 | 2018 Jan 23 | 58141.69 ± 0.16 | ∼6, ∼16, ∼15 | 15.3 ± 1.8, 5.04 ± 0.63, 5.13 ± 0.66 | 0.45 |
Notes. The Swift/XRT and XMM-Newton count rates are obtained for the 0.5−10 keV energy range and the errors are 1σ. The 2017/2018 XRT count-rate upper limit is calculated following the description in Gehrels (1986). The XMM-Newton exposure times and count rates are shown in the following order: pn, MOS 1 and MOS 2. The effective exposure times (after filtering from background flaring events in the XMM-Newton data) are shown. In the last column, ϕ indicates the phase of the binary orbit at which the observations were obtained (periastron passage corresponds to ϕ = 0 and apastron to ϕ = 0.5). The errors on the MJD indicate the start and the end times of the interval during which the observations were obtained.
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