Table A.1.
Calibrators
| Calibrator Name | Instrument | Mag. | Diam. [mas] |
| HD 171042 | PIONIER / H | 3.6 (H) | 0.87 ± 0.01 |
| HD 181019 | PIONIER / H | 3.4 (H) | 0.99 ± 0.01 |
| HD 172211 | PIONIER / H | 3.5 (H) | 0.87 ± 0.01 |
| HD 181019 | GRAVITY / K | 3.3 (K) | 0.99 ± 0.01 |
| Zeta Pav | MATISSE / L/M | -1.2 (L) | 2.70 ± 0.12 |
Notes. Calibrators used for different instruments / wavebands for the RT Pav observations on the VLTI. Diameter uncertainties are calculated from the standard deviation of GAIA, MIDI, and COHEN measured diameters in MDFC Version 10 Cruzalèbes et al. (2019) catalog. If only GAIA diameters were available the uncertainty is assumed to be 1% of the measured diameter in line with Heiter et al. (2015).
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