Open Access
Table 1.
Contribution to the systematic errors affecting the measurement of R0, for details see Gravity Collaboration (2019).
| Misalignment of mass and IR-emission | 12 pc |
| Wavelength calibration of SINFONI | 9 pc |
| GRAVITY astrometry | 29 pc |
| Baseline accuracy | 4 pc |
| Wavelength accuracy | 9 pc |
| Model and data selection | 9 pc |
| Atmospheric differential dispersion | 5 pc |
| Aberration correction | 23 pc |
| Metrology correction | 10 pc |
Notes. Adding all contributions quadratically, we find a total systematic uncertainty of 33 pc.
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