The tables below shows the efficiency of the grating only at orders 3, 4, 5, & 6 used with K, H, J, & Y filters, respectively. The efficiencies provided below are determined for the appropriate grating tilt used in MOSFIRE to selected the desired orders.

Order	Band	Dispersion (Å/pix)	Resolution (pix) [2]	λc (Å) [1]	R	Δλ (Å)	Δλ with slit -1.5' from center [3]	Δλ with slit +1.5' from center [3]	Slit shifts Å/mm [4]	Efficiency Curve Click on a thumbnail to enlarge Click again to shrink down	data
6	Y	1.0855	2.82	10373	3388	9716-11250	9900-11250 (88%)	9716-11250 (100%)	6.216		ASCII
5	J	1.3028	2.88	12450	3318	11530-13520	11650-13520 (94%)	11530-13520 (100%)	7.460		ASCII
4	H	1.6269	2.74	16321	3660	14680-18040	15280-18090 (82%)	14640-17444 (82%)	9.157		ASCII
3	K	2.1691	2.78	21760	3610	19540-23970	20340-24060 (82%)	19210-23170 (82%)	12.209		ASCII

1. Central wavelength for a slit at the center of the field.
2. For a nominal 0.7 arcsec slit
3. Wavelength range for slits places at X=± 1.5' from the field center. The number in parentheses is the fraction of the wavelength range for central slits covered by the spectra from slits at the extrema.
4. Shift of the central wavelength (Å) per ΔX=1mm at the CSU (1.379 arcsec in the telescope focal plane).

Below is an efficiency plot comparison for all four grating orders.