Background model performance measured by χ2-d.o.f. for each energy bin (i) for the entire SPI camera (left axis, black data points); and (ii) for two example detectors (right axis, detector 00 blue, detector 13 green). The ideal value of 0.0 (corresponding to a reduced χ2 of 1.0) is shown as a dotted line, together with the 1, 3, and 5σ uncertainty intervals for a χ2-statistic with 1211021 d.o.f. The majority of points fall into the 3σ band. No excess is evident either in the energy domain or for particular detectors.
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