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5.13 Light leakage in band 3D

Band 3D suffers from leakage around 27 $\mu m$ . Figure 5.13 shows band 3 data of an object with flux falling towards longer wavelengths. The slight increase in the flux seen in band 3d from about 27 $\mu m$ onwards is not real but is due to leakage from approximately 13 $\mu m$ . This leakage is of the order of 10% and will primarily affect objects with flux falling sharply towards long wavelengths.

**Figure 5.13:** Band 3 data showing the leak around 27 microns
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SWS Instrument & Data Manual, Issue 1.0, SAI/98-095/Dc