MES-AT contains a filter unit with 3 filter stacks each with an optically free diameter of 50mm. The use of the filters is to isolate the observed waveband therefore cross-dispersion is not applied to this spectrometer.
Emission line filters |
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Emission line | CWL (Å) | BW (Å) | T max (%) | Diameter (mm) |
[O II] 3726+ [O II] 3729 | 3740 | 30 | 76.86 | 50 |
Ca II 3934+HeI 3926 | 3940 | 35 | 84.13 | 50 |
He II 4686 | 4700 | 40 | 72.97 | 50 |
Ηβ4861 | 4870 | 50 | 86.11 | 50 |
[O III] 5007 | 5000 | 60 | 90.80 | 50 |
[O III] 5007 | 5020 | 50 | 82.47 | 50 |
He I 5914 | 5920 | 60 | 83.91 | 50 |
[OI]6300 | 6320 | 80 | 83.91 | 50 |
Hα+[NII] 6548, 6583 | 6580 | 100 | 88.42 | 50 |
Hα+[NII] 6548, 6583 | 6580 | 100 | 88.78 | 50 |
[SII]6717+6731 | 6760 | 100 | 87.33 | 50 |
[SII]6717+6731 | 6800 | 100 | 87.50 | 50 |