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