Table 2
Comparative statistics of CCF from the HARPS-N and FOCES observations for the Fe I detection.
| Parameter | HARPS-N | FOCES | Combined FOCES |
|---|---|---|---|
| Amplitude (ppm) | 132.7 ± 6.9 | 142.1 ± 24.4 | 123.1 ± 17.2 |
| Centre (km s−1) | −21.3 ± 0.5 | −20.4 ± 1.6 | −16.4 ± 1.7 |
| Width (km s−1) | 7.0 ± 0.4 | 7.9 ± 1.5 | 8.2 ± 1.2 |
| Detection significance | 19.2 | 5.8 | 7.2 |
| Model discrepancy | 0.3 ± 0.04 | 0.1 ± 0.1 | 0.3 ± 0.1 |
| Discrepancy significance | 7.5 | 1.0 | 3.0 |
Notes. This tables shows the summary statistics from the bootstrap fits of the one-dimensional cross-correlation function for Fe I. The column labelled ‘FOCES’ showcases the fit for the most successful observation night, which was on 18 July 2022. Furthermore, the ‘Combined FOCES’ column presents a fit applied to results generated by following the methodology described in Sect. 4.1. Detection significance is the ratio of the amplitude fits to their measured standard deviation. Model discrepancy is the measured difference between the predicted signal of the model and the actual signal. It is measured as one minus the ratio of the fitted amplitude of the cross-correlation function against the height of the model’s peak.
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