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Table 1

Comparison of the present open cluster sample with literature data used for cluster age distribution construction.

No Sample N Basic source
1 Wi71 1.0 70 BF71
2 PM86 1.0 116 Lund3
3 BC91a 2.0 94 Lund5
4 La05b 0.6 114 COCD
5 Pi06c 0.85 259 COCD
6 Mo13d 3.0e 143 ATLASGALf
7 Present 1.0−6.0 2242 MWSC

Notes. (a) subset of bright clusters I(MV) < −4.5; (b) subset of known clusters; (c)cmp subset; (d) inner clusters with |l| ≦ 60°, |b| ≦ 1.5°; (e) distance limit of the representative sample; (f)compilation of 17 lists on the basis of Dias et al. (2002) catalogue ver.3.1.

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