Fig. 1
Left panel: 2MASS Ks-band image of the Orion Trapezium and the Kleinmann-Low nebula region, θ1 C and the Becklin-Neugebauer object are marked for reference. The positions of the two on-source slits are shown. Right panel: the region around Orion-KL source I (marked with a cross and labeled) at 2.28 μm is reproduced from an ESO-Archive SOFI-NTT observation (originally acquired for the ESO program 64.I-0493). The small slitlets marked from a to d show the regions we used to extract the spectra shown in Fig. 2.
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