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Table 1

Statistics for the classification of R08 objects.

Category N σ(N) %YSOs σ(%YSOs) %AGB σ(%AGB)

all objects 5355 ···a 71.4 ···a 28.6 ···a
ambiguous/special casesb 939 17 75.9 1.4 24.1 1.4
U0 134 ···a 90.3 3.9 9.7 3.9
U1_S1 964 14 69.6 1.3 30.4 1.3
U1_S0 60 13 76.8 7.2 23.2 7.2
UM_S1 2504 47 65.3 0.7 34.7 0.7
UM_SM 265 50 82.0 3.1 18.0 3.1
UM_SM_K10 11 4 83 16 17 16
UM_S0 56 11 74.9 7.3 25.1 7.3
UM_S0_K10 53 16 59.8 8.5 40.2 8.5
low S/N in the K-band 370 5 91.6 2.3 8.4 2.3

Notes. N is the mean number of objects that fall in each category for the whole set of 105 MC simulations, while σ(N) represents the corresponding standard deviation. The remaining columns give the proportions (in percentages) of YSOs and AGB stars for the objects within each category (%YSOs and %AGB, respectively), and the estimated 1σ uncertainties on these proportions (σ(%YSOs) and σ(%AGB), respectively). The different categories are explained in the text. The sample of R08 objects used to construct this table consists of the 5355 objects not affected by any kind of saturation in the UKIDSS images.

(a)

Fixed number, not affected by MC simulations.

(b)

These particular cases are detailed in Appendix D.

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