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Table 11.
Residual telescope polarization ptel and θtel for the filters V, N_R, and N_I as measured from the standard star measurements taken in 2015 and the VBB filter measurements of ϵ Eri (Figs. 23 and 24).
| Filter | λc | ncal | ptel | σp | δtel | σδ |
|---|---|---|---|---|---|---|
| (F) | (nm) | (%) | (%) | (°) | (°) | |
| Zero-polarization standard stars | ||||||
| V | 554 | 17 | 0.57 | ±0.03 | 6.7 | ±3.2 |
| N_R | 646 | 17 | 0.55 | ±0.04 | 12.6 | ±3.6 |
| N_I | 817 | 17 | 0.42 | ±0.04 | 68.1 | ±3.8 |
| ζ Tuc | ||||||
| V_S | 532 | 1 | 0.53 | 5.8 | ||
| V | 554 | 1 | 0.52 | 7.8 | ||
| V_L | 582 | 1 | 0.49 | 11.1 | ||
| N_R | 646 | 1 | 0.53 | 10.1 | ||
| NB730 | 733 | 1 | 0.46 | 16.9 | ||
| N_I | 817 | 1 | 0.44 | 71.5 | ||
| I_L | 871 | 1 | 0.52 | 72.1 | ||
| ϵ Eri | ||||||
| VBB | 735 | 9 | 0.41 | ±0.02 | 16.7 | ±1.6 |
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