High-medium slit resolutions for 18um

Same echelle voltage/angle as 4th order Q-branch of C2H2 except with filter=18a instead of 14um. There are 3 H2O lines in 3rd order near 520cm^-1. All images were taken with the gas cell rinsed and continually pumping.

Same measurement procedure as for high-medium slit resolutions at 14um. As there are only 3 lines available, I list the median of the  FWHM from Gaussian fits to the 20 innermost columns of each line.

Line 1: 547.82
Line 2: 546.30
Line 3: 545.30


All files are from B_12_02_24/
#filename slitfeature line1_FWHM line2_FWHM   line3_FWHM
b022.fits    17km/s     -        32.08        33.61
b023.fits    6.0km/s    13.77    12.25        13.45
b024.fits    4.5km/s    11.57    10.18        11.34
b025.fits    3.5km/s    10.32     8.89        10.15
b026.fits    3.5km/s    10.36     8.87        10.16
b027.fits    2.7km/s     9.52     7.94        8.98
b028.fits    2.0km/s     9.15     7.56        8.54
b029.fits    1.5km/s     8.82     7.34        8.26