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Table 4

Coefficients âR(k) in Eq. (36) and âT(k) in Eq. (38) derived from FORS2 observations, with nominal uncertainties.

FWHM arcsec k/β

6/2 8/3 10/4 12/5 14/6
âR(k) (μas)

0.4–0.6 192.6 ± 0.3 174.4 ± 0.3 85.6 ± 0.2 80.3 ± 0.2 55.6 ± 0.4
0.8–1 215.6 ± 0.5 199.7 ± 0.4 94.3 ± 0.4 88.4 ± 0.4 63.3 ± 0.6
any 204.2 ± 0.4 186.0 ± 0.3 89.4 ± 0.2 83.2 ± 0.3 58.3 ± 0.4

âR(k) (μas)

0.4–0.6 191.1 ± 0.3 176.5 ± 0.3 83.3 ± 0.1 76.6 ± 0.1 52.6 ± 0.2
0.8–1 218.1 ± 0.5 202.9 ± 0.4 93.6 ± 0.2 86.8 ± 0.2 60.3 ± 0.3
any 205.0 ± 0.4 188.2 ± 0.3 88.7 ± 0.2 82.4 ± 0.2 55.8 ± 0.2

aF(k) (μas)

any 204 ± 4 185 + 4 90 ±2 82 ± 1 55 ± 1

Notes. Coefficients were derived for good, bad, any seeing conditions, exposure T = 30 s and R0 = 1′.

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