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#author("2023-01-01T09:13:41+00:00","default:mimizuku","mimizuku") #author("2023-01-01T09:16:55+00:00","default:mimizuku","mimizuku") [[Observing]] *Available Modes [#sa04900b] Available spectroscopic modes are listed in the table below. |Name|Wavelength &br; range (um)|Resolving &br; power|Note|h |N| 7.0-13.5|170|| |Q|16.5-26.0|110|| *Saturation limit [#a4b8ca1b] Saturation limits depend on wavelength as shown in the figures below, and the typical levels are summarized in the following table. |LEFT:100|LEFT:100|c |&ref(saturation_dia_N.jpg,,20%);|&ref(saturation_dia_Q.jpg,,20%);| |Saturation limit of the N band mode.|Saturation limit of the Q band mode.| &br; |Name|Saturation limit|h |N|5 kJy| |Q|80 kJy| *Sensitivity [#rd6932b7] 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 [#i6e9710b] |LEFT:100|LEFT:100|LEFT:100|c |&ref(sensitivity_dia_N_PWV0.3.jpg,,20%);|&ref(sensitivity_dia_N_PWV0.7.jpg,,20%);|&ref(sensitivity_dia_N_PWV1.2.jpg,,20%);| |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 [#dae04326] |LEFT:100|LEFT:100|LEFT:100|c |&ref(sensitivity_dia_2.7um_PWV0.3.jpg,,20%);|&ref(sensitivity_dia_2.7um_PWV0.7.jpg,,20%);|&ref(sensitivity_dia_2.7um_PWV1.2.jpg,,20%);| |2.7um-mode sensitivity at PWV=0.3 mm.|2.7umL-mode sensitivity at PWV=0.7 mm.|2.7um-mode sensitivity at PWV=1.2 mm.| |&ref(sensitivity_dia_Q_PWV0.3.jpg,,20%);|&ref(sensitivity_dia_Q_PWV0.7.jpg,,20%);|&ref(sensitivity_dia_Q_PWV1.2.jpg,,20%);| |Q-mode sensitivity at PWV=0.3 mm.|Q-mode sensitivity at PWV=0.7 mm.|Q-mode sensitivity at PWV=1.2 mm.|
