IRAS Explanatory Supplement
XI. Known Processing Anomalies
C. Frequency Dependence of Responsivity with Amplitude
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The observations described in
Section IV.A.4 established
that flux densities greater than 10 Jy at 60 and 100 µm are in
error of at least 30% at 60 µm and up to 70% at 100 µm because
the responsivity of the detectors varied with the total flux on
the detectors. This effect depends on the background as well as
on the brightness of the source itself. The photometry of any
source in a background greater than 10 MJy sr-1 at 60 and 100
µm is therefore suspect.
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