1 dark1 to dark6 were taken with the monochromator slits closed (10um), but the Xe arc lamp turned on and the output fibre connected.
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3 These reveal the shape of the Xe arc lamp spectrum!
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5 dark7 to dark11 were taken with the output fibre from the monochromator disconnected.
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7 reference1 to reference8 were taken with the fibre connected, and slit width 100um
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9 dark12 were taken after the references (to see whether exposing the spectrometer to bright light would affect subsequent readings)
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