Table 3: Spectral line wavelengths used for EW measurements.

Wavelength (Å)	Spectral lines
6393.4	Fe I
6436.7	Ca I
6462.4	Ca I/Fe I
6546.0	Fe I
6574.9	Fe I
6592.7	Fe I
6643.4	Ni I
6677.8	Fe I
6717.5	Ca I