Full spectrum of the L2 setting of MonR2 1RS 3. The green line is a heavily smoothed median filter of the original spectrum used to define the baseline. The spectrum has been fully reduced, therefore the atmosphere and blaze function have been removed by division by the standard star. Regions of poor transmission have been masked out. The broad absorption feature at 3.041 µm is due to the presence of the H I (5–10) line in emission in HR1931, and the other broad absorption features are spurious features resulting from regions of very poor transmission.