GRAVITY for MATISSE - Improving the MATISSE performance with the GRAVITY fringe tracker

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Table 2

Water vapour co-phasing parameters.

Band	N^w	$\frac{1}{γ^{w}} \equiv λ \frac{\partial N^{w}}{\partial λ}$ ${1 \over {{\gamma ^w}}} \equiv \lambda {{\partial {N^w}} \over {\partial \lambda }}$	$[N_{λ}^{w} - N_{K}^{w}] γ_{K}^{W}$ $\left[ {N_\lambda ^{\rm{w}} - N_{\rm{K}}^{\rm{w}}} \right]\gamma _{\rm{K}}^{\rm{W}}$	$\frac{γ_{K}^{w}}{γ_{λ}^{w}}$ ${{\gamma _K^w} \over {\gamma _\lambda ^w}}$
K (2.2 µm)	90.29 × 10⁻⁸	−9.13 × 10⁻⁸	0.000	1.000
L (3.75 µm)	87.95 × 10⁻⁸	−13.05 × 10⁻⁸	0.256	1.429
M (4.75 µm)	83.49 × 10⁻⁸	−30.24 × 10⁻⁸	0.745	3.312
N (10.5 µm)	64.91 × 10⁻⁸	−71.43 × 10⁻⁸	2.780	7.824

Notes. The numbers above are derived from the refractivity indexes calculated by Colavita et al. (2004). They are meant to be used with Eqs. (1) and (2), following the strategy of Koresko et al. (2006).

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