Table 1: Table of the observations reduced and analysed for this work in addition to those reported by Kayser et al. (2005). The different field names in $\omega$ Cen are abbreviated by their location in the cluster (e.g om-e corresponds to east). The ending "rgb'' refers to red giant stars, "to'' to main-sequence turn-off stars, "ms'' correspondingly to upper main-sequence stars. The field of view of a MXU mask is 6 $\hbox {$.\mkern -4mu^\prime $ }$ 8 $\times$ 6 $\hbox {$.\mkern -4mu^\prime $ }$ 8.
Date Mask $\alpha_{2000}$ $\delta_{2000}$ Exp. time (red) [s] Exp. time (blue) [s]

2002/05/10 om-n-rgb 13:26:46.7 -47:18:43.3 1 $\times$ 120, 1 $\times$ 240 2 $\times$ 300

2002/05/11 om-e-rgb 13:27:48.1 -47:27:27.4 2 $\times$ 180 2 $\times$ 240

2002/05/11 om-s1-rgb 13:26:57.4 -47:37:43.1 2 $\times$ 180 2 $\times$ 240

2002/05/11 om-n-ms 13:26:46.7 -47:18:43.2 3 $\times$ 1080 3 $\times$ 1200

2002/05/12 om-s2-rgb 13:26:57.3 -47:43:42.9 2 $\times$ 180 2 $\times$ 240

2002/05/12 om-s2-ms 13:26:57.3 -47:43:40.0 3 $\times$ 960 3 $\times$ 1200

2002/05/12 om-s1-ms 13:26:57.8 -47:37:43.7 3 $\times$ 900 3 $\times$ 1200

2002/05/12 om-e-ms 13:27:48.1 -47:27:30.8 3 $\times$ 900 3 $\times$ 1200

2002/05/10 M 55-to 19:39:59.1 -30:53:01.2 3 $\times$ 600 3 $\times$ 720

2002/05/11 M 55-rgb 19:39:58.9 -30:52:56.4 2 $\times$ 180 2 $\times$ 240

2002/05/12 M 55-ms 19:39:58.9 -30:52:59.0 2 $\times$ 900 2 $\times$ 900

**Table 1:** Table of the observations reduced and analysed for this work in addition to those reported by Kayser et al. (2005). The different field names in $\omega$ Cen are abbreviated by their location in the cluster (e.g om-e corresponds to east). The ending "rgb'' refers to red giant stars, "to'' to main-sequence turn-off stars, "ms'' correspondingly to upper main-sequence stars. The field of view of a MXU mask is 6 $\hbox {$.\mkern -4mu^\prime $ }$ 8 $\times$ 6 $\hbox {$.\mkern -4mu^\prime $ }$ 8.
Date	Mask	$\alpha_{2000}$	$\delta_{2000}$	Exp. time (red) [s]	Exp. time (blue) [s]
2002/05/10	om-n-rgb	13:26:46.7	-47:18:43.3	1 $\times$ 120, 1 $\times$ 240	2 $\times$ 300
2002/05/11	om-e-rgb	13:27:48.1	-47:27:27.4	2 $\times$ 180	2 $\times$ 240
2002/05/11	om-s1-rgb	13:26:57.4	-47:37:43.1	2 $\times$ 180	2 $\times$ 240
2002/05/11	om-n-ms	13:26:46.7	-47:18:43.2	3 $\times$ 1080	3 $\times$ 1200
2002/05/12	om-s2-rgb	13:26:57.3	-47:43:42.9	2 $\times$ 180	2 $\times$ 240
2002/05/12	om-s2-ms	13:26:57.3	-47:43:40.0	3 $\times$ 960	3 $\times$ 1200
2002/05/12	om-s1-ms	13:26:57.8	-47:37:43.7	3 $\times$ 900	3 $\times$ 1200
2002/05/12	om-e-ms	13:27:48.1	-47:27:30.8	3 $\times$ 900	3 $\times$ 1200
2002/05/10	M 55-to	19:39:59.1	-30:53:01.2	3 $\times$ 600	3 $\times$ 720
2002/05/11	M 55-rgb	19:39:58.9	-30:52:56.4	2 $\times$ 180	2 $\times$ 240
2002/05/12	M 55-ms	19:39:58.9	-30:52:59.0	2 $\times$ 900	2 $\times$ 900

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and reductions
	3 Grid of observed spectra
	4 Grid of synthetic spectra
	5 Artificial neural networks
	6 Validation of the network model
	7 Concluding remarks
	References