Table 2
Statistical comparison between the different continuum determination methods described in Sect. 2.1.
| Success rate (in %) for different discrepancies | ||||||||
|
|
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| Continuum determination method | Mean | Median | Deviation | <1% | <5% | 5–10% | 10–25% | >25% |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
|
|
||||||||
| (A) maximum | 50.97 | 50.54 | 8.9 | 26.4 | 75.3 | 16.5 | 3.3 | 4.9 |
| (B) mean | 55.77 | 53.81 | 16.6 | 7.8 | 22.4 | 13.6 | 31.2 | 32.8 |
| (C) mean (sel.) | 51.05 | 50.57 | 9.0 | 25.3 | 63.9 | 20.0 | 11.1 | 5.0 |
| (D) median | 52.96 | 51.21 | 12.7 | 16.5 | 41.5 | 13.2 | 25.9 | 19.4 |
| (E) median (sel.) | 51.02 | 50.55 | 9.0 | 27.6 | 67.9 | 18.4 | 8.7 | 5.0 |
| (F) 25th percent | 44.32 | 48.14 | 12.7 | 11.0 | 41.5 | 16.9 | 18.1 | 23.5 |
| (G) 75th percent | 65.38 | 56.95 | 21.8 | 7.3 | 25.9 | 15.2 | 22.0 | 36.9 |
| (H) Gaussian | 51.31 | 50.62 | 10.2 | 26.8 | 57.2 | 17.8 | 13.1 | 11.9 |
| (I) Gaussian (sel.) | 51.04 | 50.62 | 8.8 | 25.6 | 65.7 | 19.9 | 9.2 | 5.2 |
| (J) KDE max | 50.69 | 50.70 | 9.5 | 21.6 | 70.5 | 16.4 | 7.3 | 5.8 |
| (K) SCM | 50.60 | 50.49 | 8.4 | 33.8 | 77.1 | 12.9 | 3.2 | 6.8 |
| (L) c-SCM | 50.19 | 50.22 | 8.2 | 48.8 | 87.9 | 4.4 | 0.9 | 6.8 |
Notes. The real continuum level of each of the 750 synthetic spectra is 50 K. Therefore, the closer the mean and median values are to this value, the more accurate the continuum determination method is. The success rate indicates how many cases (in %) are within a certain level of discrepancy: difference between determined continuum level and real value of 50 K.
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