Table 2: Parameters of the calibrators used for estimating the transfer function.
Name Spectral Diameter Flux dens. Nighta
  type [mas] [Jy @12 $\mu $m]  
HD 107446 K3.5III 4.42 $\pm$ 0.03 22.0 4
HD 109379 G5II 3.25 $\pm$ 0.02 15.1 1
HD 123139 K0IIIb 5.34 $\pm$ 0.03 36.4 3
HD 134505 G8III 2.50  $\pm$ 0.01 8.4 4
HD 142804 M1III 2.79 $\pm$ 0.04 8.0 7
HD 152820 K5III 2.62 $\pm$ 0.01 7.5 3, 4
HD 160668 K5III 2.28 $\pm$ 0.01 5.7 3, 5
HD 165135 K0III 3.48 $\pm$ 0.02 15.5 1-7
HD 169767 G9III 2.16 $\pm$ 0.01 5.9 3
HD 169916 K1IIIb 4.00 $\pm$ 0.03 20.1 4
HD 173484 M4III 3.43 $\pm$ 0.04 11.9 5, 6
HD 177716 K1IIIb 3.76 $\pm$ 0.03 17.1 2
HD 178345 K0II 2.49 $\pm$ 0.01 7.6 5-7
HD 188512 G8IV 2.07 $\pm$ 0.01 5.9 1-3
HD 192947 G6/G8III 2.33 $\pm$ 0.02 7.5 1
HD 213009 G7III 2.08 $\pm$ 0.02 5.9 5
HD 218594 K1III 3.18 $\pm$ 0.02 12.4 3
HD 220704 K4III 3.45 $\pm$ 0.02 13.2 7

a The night in which the calibrator was used.

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