Open Access
Table 6
Summary of the general requirements of the integral field spectropolarimeters.
| Spatial resolution | Diffraction limit in each optical arm |
| FOV | 10″ × 10″ |
| Cadence | 1. Up to around 60 FPS in spectroscopy mode |
| 2. 15 s at diffraction limit, polarimetry with 5 × 10−4 of Icont | |
| Integral Field Unit | 1. Microlens arrays in the blue, visible, and red arms. |
| 2. Image slicer in the infrared arms | |
| Spectral resolution | Minimum of 150 000 |
| Spectral range | Minimum of 1 nm |
| Reference spectral lines | 1. Blue: Ca II 396 nm, BaII 455 nm, Sr I 461 nm, Hβ 486 nm |
| 2. Visible: Mg I 517 nm, Na I 589 nm, Fe I 630 nm, Hα 656 nm | |
| 3. Red: K I 770 nm, Ca II 854 nm | |
| 4. Infrared: He I 1083 nm, Fe I 1565 nm | |
| Polarimetry | Dual-beam to reduce the seeing-induced crosstalk |
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