Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho‘oea (α Lyrae) and Hokulei (α Aurigae)

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Table 4

Summary of the results: expected (from Torres et al. 2015) and estimated position of the Hokulei binary companion on both days of observation from the collected data.

Date	Expected separation	Expected position angle	Estimated separation	Estimated position angle	Data covariance
Sept. 16th 2020	45.1 mas	274.7 degrees	44.3 ± 0.1 mas	274.7 ± 0.1 degrees	−0.02 mas²
Sept. 17th 2020	46.0 mas	270.7 degrees	46.4 ± 0.1 mas	270.6 ± 0.2 degrees	0.32 mas²

Notes. The errors presented here are computed as the standard deviation of the averaged estimates provided by each cubes, hence the standard deviation of the cube estimates divided by (with N the number of cubes).

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