Table A.2: INDO-US to Lick/IDS transformation.
Index Slope (m) Intercept (q) rms
H$\beta $ 1.01 0.13 0.25
Mgb 0.89 0.32 0.35
Fe5270 0.97 0.12 0.29
Fe5335 1.01 0.08 0.32
H $\gamma_{\rm A}$ 1.01 -0.15 0.71
H $\delta_{\rm A}$ 0.98 -0.02 0.83
H $\gamma_{\rm F}$ 1.01 -0.10 0.43
H $\delta_{\rm F}$ 0.98 0.14 0.51
The calibrated index is $i_{\rm Lick/IDS}=m$ $\times $ ${i_{\rm INDO-US}}+q$; the rms is calculated on the basis of $\sim $150 stellar spectra.

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