Fig. 5
HD 217987 summary. (a) RV time variations corrected from the secular acceleration drift. (b) BVS time variations, HARPS fiber change is shown with a vertical red line. (c) RV corrected from the secular acceleration drift vs BVS. The best linear fit is presentend in red dashed line. (d) log 
time variations. (e) FWHM time variations.
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