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Fig. 1
Chromospheric activity in HD 147513: Comparison between Ca II K observed with HARPS in 2012 July 18 (red dotted line) and archive FEROS spectra from 2006 July 15 (black solid line). The HARPS spectra have been rebinned to enable a better comparison with the FEROS spectra, which have a lower spectroscopic resolution.
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