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Table 7:

Slopes of the Arches cluster IMF derived from average dereddening are shown in the two first rows.
     r < 0.2 pc 0.2 < r < 0.4 pc r < 0.4 pc
$\Gamma^{a}$ $-0.60\pm0.17$ $-1.15\pm0.20$ $-0.81\pm0.19$
$\Gamma^{b}$ $-0.60\pm0.17$ $-1.23\pm0.23$ $-0.96\pm0.24$
$\Gamma^{c}$ $-0.88\pm0.20$ $-1.28\pm0.20$ $-1.1\pm0.2$
a IMF slope derived without radial correction; b IMF slope derived with a radial correction for r > 0.2 pc to take into account the differential extinction (as proposed in SGB02, SBG05); c this work. Individual derredening results described in Sect. 4.1.
A 2.5 Myr theoretical isochrone with solar metallicity (Lejeune & Shaerer 2001) was used to derive these results.

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