The IPCS is used a great deal by many spectroscopists, but data reduction still proves troublesome in applications where high accuracy is desired. The literature reflects persistent concern with flat-fielding, reliable error analysis, and the properties of data obtained at high count rates. In this paper I attempt a quantitative analysis of these problems, aiming to elucidate the processes at work so that astronomers can calibrate and correct their data with a fuller understanding of what is involved. It appears that flat-field correction can (and often should) be done; the non-linearity of the detector is appreciable, but can be corrected for in many cases; and the statistics of data obtained at all but the lowest count rates are very complicated.
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C. R. Jenkins (1987) studied this question.