OSCIR Spectroscopy

OSCIR contains a grating for low resolution spectroscopy and 6 slits of various widths that can be used to achieve a wide range of spectral resolutions:

property	low-resolution grating
grating blaze wavelength (um)	9.22
each pixel spans (um)	0.028
full array spans (um)	3.66
minimum grating settings to span 8-14um window	2

The expected slit-limited spectral resolutions (R = l/ Dl) are shown in the table below:

Slit Width (arcseconds)	Pixels across slit	Resolution (low)
0.227	2.7	123
0.340	4.0	82
0.454	5.3	62
0.567	6.7	49
0.681	8.0	41
0.794	9.4	35

Last update August 31, 2000; Phil Puxley
In original form; Scott Fisher