Free Access

Fig. 11


Sky-subtraction results for the three X-shooter arms for the sky spectrum derived from the same 2D spectrum as the object spectrum (Δt = 0). The input object spectrum (black), the skycorr-corrected spectrum (green), and the corresponding X-shooter pipeline product based on sky interpolation in the 2D spectrum (magenta) are shown. For a better comparison, the latter is shifted by 0.4 dex to lower values. The spectra are not flux calibrated. This explains the apparent flux jump between the UVB and VIS arm at about 0.59 μm and the bump at about 2.14 μm (cf. Parsons et al. 2012). The strong uncorrected lines in the near-IR (mainly between 1.0 and 1.35 μm) were mostly caused by instrumental defects.

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.