COMICS medium-resolution N-band spectroscopy

The medium-resolution N-band grating provides a resolution of 2500 (0.33'' slit) and a dispersion of 0.002 um/pixel. The spectrum is dispersed onto all 5 of the COMICS spectrograph's detectors, with large gaps between them. The grating tilt can be selected to vary the wavelength regions which fall on the detectors, or the entire N-band (7.8-13.3 um) can be covered in two standard grating positions. Note that the wavelength axis is tilted with respect to the detector columns, by about 20-30 pixels (~0.05 um) over the entire length of the slit.

Detectors	1		2		3		4		5
Coverage (um)	0.63		0.62		0.61		0.60		0.59
		0.49		0.48		0.47		0.46

The point-source sensitivity of the NM grating varies with wavelength and is shown in the following figure (1 sigma for 1 second of on-source integration time).