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Using observations of three transits we investigate the origin of the absorption, which is also seen in H{\\alpha} and the Na I D lines. Applying differential spectrophotometry methods to the Ca II H and Ca II K lines combined, using respective passband widths of $\\Delta\\lambda$ = 0.4 & 0.6 \\AA\\ yields excess absorption of t$_d$ = 0.0074 $\\pm$ 0.0044 (1.7$\\sigma$; Transit 1) and 0.0214 +/- 0.0022 (9.8$\\sigma$; Transit 2). 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