Table 2
Parameter values for the best fit models as defined by Eq. (2).
| Outer area (linear model) | Inner area (cubic model) | |||||||||||
| Data set | a | σ a | b | σ b | a | σ a | b | σ b | c | σ c | x 0 | σ x 0 |
|
|
||||||||||||
| on-sky x | 0.109 | ±0.008 | 0.004 | ±0.002 | 0.790 | ±0.167 | –0.014 | ±0.057 | –0.082 | ±0.020 | 0.003 | ±0.031 |
| simulated x | 0.111 | ±0.006 | 0 | ±0.002 | 0.986 | ±0.090 | –0.055 | ±0.034 | –0.095 | ±0.012 | 0 | ±0.015 |
| on-sky y | 0.113 | ±0.013 | 0.010 | ±0.003 | 0.767 | ±0.045 | 0.128 | ±0.015 | –0.084 | ±0.005 | –0.039 | ±0.007 |
| simulated y | 0.104 | ±0.004 | 0 | ±0.001 | 0.976 | ±0.109 | 0.014 | ±0.032 | –0.106 | ±0.010 | –0.002 | ±0.016 |
| ideal model | 0.104 | ±0.007 | 0 | ±0.002 | 1.013 | ±0.051 | 0 | ±0.019 | –0.146 | ±0.007 | 0 | ±0.009 |
Notes. The results are reported for the on-sky data sets (see Fig. 6) as well as for the data sets simulated with the same tip-tilt sampling (see Fig. 7). The ideal model corresponds to the result of the fit performed on the simulated model shown in Fig. 3, including a much larger number of simulated data points (not biased by the sampling or by the offset in the orthogonal direction of the applied tip/tilt). Values below 10-3 are considered insignificant and marked as 0.
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