All Tables

• Table 1: Journal of observations with NACO/UT4. The phase within the 5.52-year cycle is computed from the ephemeris of Daminelli et al. (2000).
• Table 2: Journal of observations with MIDI/UT1-UT3. The phase within the 5.52-year cycle is computed from the ephemeris of Daminelli et al. (2000).
• Table 3: Separation and position angle measurements with respect to the star of several blobs seen in our images.
• Table 4: Positions and beam size of the apertures used to extract the spatially resolved spectra along the main axis of the nebula, increasing numbers from north to south. The three last columns report the result of the best fit to the spectra by using thermal emission with temperature T_bb and opacities computed for various dust species.