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Table 1.

FWHM and FoV of MIRI/MRS channels and bands.

MRS channel PSF FWHM FoV H2 lines
and band (arcsec) (arcsec) detected
Ch1-short (Ch1-s) 0.278 3.2 × 3.7 ...
Ch1-medium (Ch1-m) 0.290 3.2 × 3.7 ...
Ch1-long (Ch1-l) 0.294 3.2 × 3.7 0−0S(5)

Ch2-short (Ch2-s) 0.359 4.0 × 4.8 0−0S(4)
Ch2-medium (Ch2-m) 0.379 4.0 × 4.8 0−0S(3)
Ch2-long (Ch2-l) 0.423 4.0 × 4.8 ...

Ch3-short (Ch3-s) 0.503 5.2 × 6.2 0−0S(2)
Ch3-medium (Ch3-m) 0.541 5.2 × 6.2 ...
Ch3-long (Ch3-l) 0.603 5.2 × 6.2 0−0S(1)

Ch4-short (Ch4-s) 0.760 6.6 × 7.7 ...
Ch4-medium (Ch4-m) 0.823 6.6 × 7.7 ...
Ch4-long (Ch4-l) 0.835 6.6 × 7.7 ...

Notes. FWHM measured from the collapsed spectrum of the star HD 163466 in each of the 12 sub-channels of MIRI/MRS, and FoV of each channel. The pixel sizes employed to convert from pixels to arcseconds are 0 . $ \overset{\prime \prime }{.} $13 in Ch1, 0 . $ \overset{\prime \prime }{.} $17 in Ch2, 0 . $ \overset{\prime \prime }{.} $20 in Ch3, and 0 . $ \overset{\prime \prime }{.} $35 in Ch4 (see https://jwst-docs.stsci.edu/jwst-mid-infrared-instrument/miri-observing-modes/miri-medium-resolution-spectroscopy#gsc.tab=0). The last column indicates the channels where we detect the H2 lines from S(5) to S(1), which have rest-frame wavelengths of 6.90952, 8.02505, 9.66492, 12.27861, and 17.03484 μm, respectively.

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