On detecting the large separation in the autocorrelation of stellar oscillation times series

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Table 3:

Threshold levels.
$\mathcal{A}_{{\rm max}}$	Detection
<5.7	no detection (10% rejection level)
<8.0	no detection (1% rejection level)
10	measurement of $\langle\Delta\nu\rangle$ with 0.5% precision
$\ge$ 50	fitting of the modes has proven to be possible
$\ge$ 200	identifying the mode degree has proven to be possible
$\ge$ 300	possible estimate of the small separation as in Roxburgh & Vorontsov (2006)

The threshold values are given for a typical F dwarf. They can be made precise for a given star, according to its specific parameters $\alpha$ and $\gamma$ . Levels are lower for red giants (to be estimated with $\gamma \simeq 4$ instead of 10).

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