Table 4: Typical values of the different considered error sources. Phot.: photonic noise; Flux: flux calibration; Wave.: wavelength calibration; Dichr.: typical error in the subtraction of the dichroic pattern (this error is only added in the measurements of Run 2). Res.: residual errors, based on repeated observations of 10 galaxies.

Index	Phot.	Flux	Wave.	Dichr.	Res.
				(Run 2)
D4000	0.006	0.088	0.000	0.001	0.000 Å
H	0.156	0.038	0.005	0.053	0.000 Å
H	0.104	0.009	0.009	0.021	0.000 Å
CN1	0.004	0.002	0.000	0.003	0.001 mag
CN2	0.005	0.003	0.000	0.003	0.010 mag
Ca4227	0.072	0.002	0.006	0.023	0.000 Å
G4300	0.121	0.014	0.013	0.138	0.074 Å
H	0.143	0.033	0.002	0.121	0.302 Å
H	0.087	0.012	0.003	0.062	0.072 Å
Fe4383	0.167	0.045	0.019	0.114	0.161 Å
Ca4455	0.086	0.004	0.024	0.024	0.000 Å
Fe4531	0.127	0.015	0.012	0.026	0.000 Å
C4668	0.186	0.171	0.010	0.012	0.054 Å
H	0.078	0.010	0.007	0.003	0.029 Å
Fe5015	0.167	0.081	0.022	0.025	0.115 Å
Mgb	0.087	0.035	0.006	0.108	0.029 Å
Fe5270					0.050 Å
Fe5335					0.000 Å