Table 2.
Relative astrometry of β Pic c extracted from our VLTI/GRAVITY observations.
| MJD | ΔRA | ΔDec | σΔRA | σΔDec | ρ |
|---|---|---|---|---|---|
| (days) | (mas) | (mas) | (mas) | (mas) | − |
| 58889.140 | −67.35 | −112.60 | 0.16 | 0.27 | −0.71 |
| 58891.065 | −67.70 | −113.18 | 0.09 | 0.18 | −0.57 |
| 58916.043 | −71.89 | −119.60 | 0.07 | 0.13 | −0.43 |
Notes. Due to the interferometric nature of the observations, a correlation coefficient ρ is required to properly describe the confidence intervals, which are not aligned on the sky coordinates. The covariance matrix can be reconstructed using σΔRA2 and σΔDec2 on the diagonal, and ρσΔRAσΔDec off-diagonal.
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