Ecliptic latitude [deg]

Figure 3. Upper panels: high spatial resolution (A¡3 = 3') scans across the Ecliptic taken by ISOPHOT at A - Ae = +90° on Jan. 8, 1997 {dots). At A < 25 /zm the 180" circular aperture was selected; at 60/zm the C100 camera (3x3 pixels, 43" x 43"/pix) was used. The /0=[-5,+5] degree scans were performed two days later than the [-13,5] scans, causing an offset in the absolute brightness. The 25/um scan was repeated on Jan. 8, 1998 with lower spatial resolution (A/3 = 30', triangles). The positions of the —10° and ±1.4° asteroidal bands, as predicted by [19], are marked. Lower panel: Residuals of the high resolution scans after subtracting the smooth component.

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