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Table A.1
Uncorrected Lick indices. Example of same-frame sky estimate versus external frame.
| GC | Hβ | ± | Fe5015 | ± | Mg2 | ± | Mgb | ± | Fe5270 | ± | ||
|
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| ext. frame | ||||||||||||
| NGC 6528EW | 1.46 | 0.12 | 5.60 | 0.24 | 0.2514 | 0.0029 | 3.67 | 0.11 | 2.92 | 0.11 | ||
| NGC 6528NS | 1.32 | 0.12 | 5.74 | 0.23 | 0.2280 | 0.0028 | 3.59 | 0.10 | 2.75 | 0.11 | ||
| same frame | ||||||||||||
| NGC 6528EW | 1.65 | 0.07 | 5.64 | 0.14 | 0.2375 | 0.0018 | 3.65 | 0.06 | 3.02 | 0.07 | ||
| NGC 6528NS | 1.38 | 0.07 | 5.62 | 0.13 | 0.2266 | 0.0016 | 3.55 | 0.06 | 2.69 | 0.06 | ||
|
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| ext.frame | ||||||||||||
| NGC 6553EW | 1.94 | 0.06 | 5.19 | 0.12 | 0.2130 | 0.0015 | 3.68 | 0.05 | 2.56 | 0.06 | ||
| NGC 6553NS | 1.41 | 0.07 | 4.77 | 0.15 | 0.1914 | 0.0018 | 3.70 | 0.06 | 2.50 | 0.07 | ||
| same frame | ||||||||||||
| NGC 6553EW | 2.05 | 0.04 | 5.85 | 0.07 | 0.2368 | 0.0009 | 4.00 | 0.03 | 2.79 | 0.03 | ||
| NGC 6553NS | 1.63 | 0.04 | 5.40 | 0.08 | 0.2086 | 0.0010 | 3.92 | 0.03 | 2.70 | 0.03 | ||
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