Table 6.
Median and 1-σ dispersion of SR and FWHM errors obtained over the 176 H-band and high SR (> 40%) SPHERE/IRDIS images treated in this analysis for the two implemented strategies: (i) PSD/stellar parameters retrieval only (11 parameters in total) and (ii) including piston, tip, and tilt retrieval for the four pupil segments (23 parameters in total).
| Strategy | Δ SR (pts) | ΔFWHM (mas) | MSE | ||
|---|---|---|---|---|---|
| (SR> 40%) | Median | std | Median | std | |
| No LWE | 0.5 | 1.9 | −0.2 | 1.2 | 1.5 |
| With LWE | 0.2 | 1.0 | −0.1 | 1.0 | 0.7 |
Notes. Systematically, accounting for the LWE model allows us to reduce the biases and the dispersion on PSF estimates.
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