Free Access

Fig. 2.


Spectra observed with LARS in the wavelength region around 5713 Å. The solar absorption spectra were observed in the quiet Sun at disk center (blue curve), and in the sunspot umbra (red curve; based on Obs. 8 in Table 1 and spatial context in Fig. 1). The ions of the spectral lines are stated in gray. The emission spectra of the laser frequency comb (LFC, green curve) and the titanium hollow cathode lamp (HCL, black curve) are required for the calibration of absolute wavelengths and Doppler shifts. The measured reference line of Ti I at 5713.8828 Å is marked.

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.