Free Access

Fig. 5

thumbnail

Examples of average power spectral density of the interferometric signals (100 scans) obtained in the high SNR (left) and low SNR (right) regimes. Only a single spectral channel of one baseline is represented. The fringe signal corresponds to the peak at σ = 0.6μm-1 (λ = 1.66μm). The dashed red line is the fit of the underlying bias power by its theoretical form a + bsin2(2πσ/σmax). In the low SNR regime, electronic artifacts can be seen at σ ≈ 0.22μm-1, 0.8μm-1 and 0.97μm-1. In the high SNR regime, the fringe peak is clearly aliased by mechanical vibrations in VLTI (see Sect. 5.6). Figure 3 contains typical interferogram corresponding to these measurements.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.