... IMF

Table of core positions is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/462/L17

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On leave from University of Milan, Department of Physics, via Celoria 16, 20133 Milan, Italy.

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... cores

Object identification in wavelet space: for a given scale i, structures are isolated with classical thresholding at $3\sigma_{i}$ with $\sigma_{i}$ being the noise amplitude at scale i. A structure at scale i is connected with a structure at scale i+1 if its local maxima drops in the structure at scale i+1. The size scales considered were 2$^\prime$, 4$^\prime$, and 8$^\prime$ (0.08 pc, 0.15 pc, and 0.30 pc). One then builds a 3D distribution of significant structures (x, y, and i). The algorithm developed by Vandame (2006, private comm.) offers rules that split the 3D distribution into independent trees corresponding to one core and its corresponding hierarchical details. Object reconstruction: This same algorithm performs a complex iterative reconstruction of the cores following the trees defined in the previous step. The final "cores only'' image is validated by subtracting it from the extinction map, effectively creating a smooth image of the variable background.

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...

The full dataset is available in electronic form at the CDS.

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