High-medium, 14um slit resolutions

Experiment: Mapping the slit wheel features for the best case spectral resolution (where the echelle mirror was at 17 turns and the echelon mirror was at 16.5 turns)

These images are located in B_12_02_24/

Procedure:
1. subtracted 4th frame from the 1st frame of each SUTR image.

2. Selected the Q-branch lines 10-15

3. Fit 6 parameter Gaussian functions across the y-axis for +/- 10 pixels in x dimension-- then took thed median of this measurement.

4. To correct for the broadening due to the slope of the line, I fit the slope of each line, and found the correction factor: cos(arctan(slope))-- > true sigma= raw sigma x cos(arctan(slope)). Typical angles from East are about -23 degrees.

5. Multiplied the sigma values by 2*sqrt(2*ln(2)) to obtain FWHM values.

6. Found pixel scale (um/pix) by fitting a line to the wavelengths and median y-values of Q-branch lines. (for Q-branch: [10,11,12,13,14,15], I adopted these wavenumbers:
wavenums=[729.65,729.75,729.86,729.97,730.10,730.23].)

7. Below I report the filename, slit wheel feature, median FWHM (pix), minimum FWHM (pix), median resolution, maximum resolution.

(Clarifying: The median FWHM is the median value of the FWHMs obtained for 6 lines. The minimum FWHM is the minimum value within that set of 6 line FWHM. The FWHM value for each line is itself a median value of the width obtained for 20 crosscuts of the line in question. The min(FWHM) for the 17km/s slit is a glitch-- however, I supervised the fits of the other slits 1.5-6.0km/s and the minimum values of the FWHM seem to be reliable).

#filename
#filename    feature    med(FWHM) min(FWHM) med(R)  max(R)
b013.fits    1.5km/s    8.04      7.52    103497.   108617.
b014.fits    2.0km/s    8.57      8.08    95558.    101104.
b015.fits    2.7km/s    9.35      8.81    89326.    92788.
b016.fits    3.5km/s    10.75    10.17    78146.    80317.
b017.fits    4.5km/s    12.25    11.99    66808.    68154.
b018.fits    6.0km/s    14.56    14.02    56419.    58271.
b019.fits    17.km/s    37.29    24.51    23178.    33320.