Keck :W.M. Keck Observatory Keck/LWS :The Long Wavelength Spectrometer (LWS) is a Keck facility instrument offering diffraction-limited imaging and spectroscopy in the 3-25 µm range from the forward Cassegrain focus on Keck I. |
Keck/LWS.0800 | 83621.16 | 83848.39 | 83249.87 | 75585.97 | 94239.81 | 11239.31 | 54.75 | 2.37e-13 | Keck | LWS | LWS 8.0, 7.81-8.94 | Keck/LWS.0890 | 88186.17 | 88310.07 | 87987.00 | 82133.59 | 95439.44 | 8178.02 | 49.42 | 1.91e-13 | Keck | LWS | LWS 8.9, 8.39-9.27 | Keck/LWS.0990 | 100386.96 | 100468.48 | 100252.73 | 94902.09 | 106799.58 | 7448.99 | 38.50 | 1.15e-13 | Keck | LWS | LWS 9.9, 9.67-10.42 | Keck/LWS.Nwide | 101095.38 | 104871.31 | 95317.17 | 73559.35 | 137327.02 | 52412.14 | 36.98 | 1.22e-13 | Keck | LWS | LWS Nwide, 7.73-13.31 | Keck/LWS.1070 | 106692.03 | 107099.57 | 106025.98 | 89710.00 | 129900.00 | 15698.97 | 34.05 | 9.08e-14 | Keck | LWS | LWS 10.7, 9.92-11.47 | Keck/LWS.Spec10 | 107837.08 | 114452.14 | 98001.94 | 72999.19 | 154200.00 | 68146.79 | 32.10 | 1.0e-13 | Keck | LWS | LWS Spec 10, >7.52 µm (long pass) | Keck/LWS.Spec10 | Filter Description Filter ID (?) : | Keck/LWS.Spec10 |
Description (?) : | LWS Spec 10, >7.52 µm (long pass) |
Phot.System (?) : | LWS |
Detector Type (?) : | Energy counter |
Band Name (?) : | ------ |
Obs. Facility (?) : | Keck |
Instrument (?) : | LWS |
Comments (?) : | The SiC filter is better suited for broad band imaging with LWS |
| | Mathematical properties Property | Calculated | Specified | Unit | λref (?) : |
107837.08 | ------- | (Angstrom) |
λmean (?) : |
114452.14 | ------- | (Angstrom) |
λcen (?) : |
114500.65 | ------- | (Angstrom) |
λeff (?) : |
98001.94 | ------- | (Angstrom) |
λpeak (?) : |
105700.00 | ------- | (Angstrom) |
λpivot (?) : |
107837.08 | ------- | (Angstrom) |
λphot (?) : |
101751.15 | ------- | (Angstrom) |
λmin (?) : |
72999.19 | ------- | (Angstrom) |
λmax (?) : |
154200.00 | ------- | (Angstrom) |
Weff (?) : |
68146.79 | ------- | (Angstrom) |
FWHM (?) : |
78646.20 | ------- | (Angstrom) |
Af/AV (?) : |
0.0775 | ------- | () |
Fsun (?) : |
0.021 | ------- | (erg/cm2/s/A) |
| Transmission

Data file: ascii, VOTable Reference for filter response:
Keck: LWS Transmission components: Filter | | Calibration properties
Vega System Property | Specified | Calculated | Unit | Zero Point (?) : |
------- |
1.0021e-13 | (erg/cm2/s/A) |
|
------- |
32.10 | (Jy) |
ZP Type (?) : |
Pogson |
PhotCal ID (?) : |
Keck/LWS.Spec10/Vega |
|
AB System Property | Specified | Calculated | Unit | Zero Point (?) : |
------- |
1.13339e-11 | (erg/cm2/s/A) |
|
------- |
3631.00 | (Jy) |
ZP Type (?) : |
Pogson |
PhotCal ID (?) : |
Keck/LWS.Spec10/AB |
|
ST System Property | Specified | Calculated | Unit | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
|
------- |
1163254.95 | (Jy) |
ZP Type (?) : |
Pogson |
PhotCal ID (?) : |
Keck/LWS.Spec10/ST |
|
|
Filter added: 2011-10-18 05:24:43 Last update: 2020-12-10 16:32:20 | Keck/LWS.1170 | 116779.87 | 116928.66 | 116543.05 | 109007.19 | 125423.43 | 10433.13 | 28.57 | 6.31e-14 | Keck | LWS | LWS 11.7, 11.15-12.25 | Keck/LWS.SiC | 117037.57 | 117666.68 | 116007.42 | 100724.57 | 133615.15 | 22190.58 | 28.36 | 6.32e-14 | Keck | LWS | LWS SiC, 10.64-12.96 | Keck/LWS.1250 | 126138.63 | 126320.84 | 125843.39 | 117069.89 | 136331.94 | 11779.82 | 24.56 | 4.65e-14 | Keck | LWS | LWS 12.5, 12.01-13.25 | Keck/LWS.1765 | 177315.20 | 177400.71 | 177174.39 | 167592.96 | 187781.45 | 8881.96 | 12.57 | 1.2e-14 | Keck | LWS | LWS 17.65, 17.31-18.16 | Keck/LWS.1875 | 187397.87 | 187474.97 | 187264.34 | 177868.02 | 196880.31 | 9066.17 | 11.22 | 9.6e-15 | Keck | LWS | LWS 18.75, 18.31-19.20 | Keck/LWS.2310 | 230978.24 | 231033.80 | 230886.21 | 220595.57 | 241806.14 | 7881.79 | 7.43 | 4.18e-15 | Keck | LWS | LWS 23.1, 22.74 - 23.47 | Keck/LWS.2450 | 245219.25 | 245271.42 | 245133.44 | 235056.43 | 255735.63 | 8001.37 | 6.60 | 3.29e-15 | Keck | LWS | LWS 24.5, 24.16 - 24.90 |
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