mirs_spectroscopy_20230101

Observing

Available Modes†

Available spectroscopic modes are listed in the table below.

Saturation limit†

Saturation limits depend on wavelength as shown in the figures below, and the typical levels are summarized in the following table.

Saturation limit of the N band mode.	Saturation limit of the Q band mode.

Sensitivity†

1-sigma 1-sec sensitivity is shown in the figures below. Since the sensitivity is limited by readout noise (assumed 4000e-/read), it improves with longer 1-frame exposure times. For accurate background subtraction, it may be better to limit the exposure time to less than 0.2 sec.

N mode†

N-mode sensitivity at PWV=0.3 mm.	N-mode sensitivity at PWV=0.7 mm.	N-mode sensitivity at PWV=1.2 mm.

Q mode†

Q-mode sensitivity at PWV=0.3 mm.	Q-mode sensitivity at PWV=0.7 mm.	Q-mode sensitivity at PWV=1.2 mm.

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