Table 7: Calibration onto the Lick/IDS system.

Index		 Slope (m) Intercept (q) $\chi^2$
H$\beta $ 1.05 -0.23 1.7
Mgb 1.15 -0.16 12.6
Fe5270 1.03 -0.12 22.7
Fe5335 0.77 0.40 0.8
H $\gamma_{\rm A}$ 1.08 -1.45 7.5
H $\delta_{\rm A}$ 1.03 -1.09 1.4
H $\gamma_{\rm F}$ 1.00 -0.51 3.3
H $\delta_{\rm F}$ 1.05 -0.45 2.5
The measured value of a given index i is: $i_{\rm meas}=m\cdot i_{\rm ref}+q$,
where  $i_{\rm ref}$ is the value on the Lick/IDS system.

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