Open Access
Table 1
Specifications of imaging instruments installed in T1 and T4.
| T1 |
T4 |
|||
|---|---|---|---|---|
| Hα | Ca K | G-band | Continuum | |
| Objective lens | D = 125 mm, f = 2250 mm (Nikon) | D = 125 mm, f = 2250 mm (Nikon) | ||
| Beam splitter | 50/50 cube beam splitter (Edmund Optics) | |||
| Filter (λ 0/FWHM) | Prefilter 656.3 nm/2.7 nm | Heat Rejection 400 nm/50 nm | 430.5 nm/1.0 nm | ND 1% |
| (Andover) | (Edmund Optics) | (Materion Barr) | G530 530 nm/50 nm (Hoya) | |
| Lyot 656.3 nm/0.025 nm (Zeiss) | 393.4 nm/0.2 nm | ND 10% | BK7 spacer | |
| ND 50% | (DayStar) | IR-cut HA-50 (Hoya) | ||
| Field lens | D = 40 mm, f = 120 mm | D = 40 mm, f = 120 mm | D = 40 mm, f = 120 mm | |
| Imaging lens | 50 mm F2.8 Macro (Sigma) | 50 mm F2.8 Macro (Sigma) | 50 mm F2.8 Macro (Sigma) | |
| Camera | Andor Zyla 4.2 | Bitran BH-52L | Photonfocus MV1-D2080-160 | |
| Detector format | 2048 × 2048 | 2048 × 2048 | 2080 × 2080 | |
| 6.5 × 6.5 μ/pixel | 7.4 × 7.4 μ/pixel | 8 × 8 μ/pixel | ||
| A/D, Frame rate | 16 bit, 100 fps | 12 bit, 8 fps | 12 bit, 34 fps | |
| Spatial Sampling | 1.1″ pixel−1 | 1.0″ pixel−1 | 1.0″ pixel−1 | |
| Cadence | every 30 s (Hα center) | every 30 s | every 5 min | every 5 min |
every 150 s (H offband) |
||||
| Exposure | 1 ms/4 ms/16 ms | 160 ms (320 ms, 640 ms)a | 0.7 ms (1.4 ms, 2.8 ms)b | 1.6 ms (3.2 ms, 6.4 ms)b |
| Frame selection | every 30 images | every 10 images | every 30 images | every 30 images |
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