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Table 1
Properties of the grism forming the FORS2 standard instrument configuration for which F-VIPGI is usable.
| Grism name | Central wavelength | Wavelength range | Dispersion | Resolution | Order separation | |
| [nm] | [nm] | [Å/mm] | [Å/pixel] | λ/Δλ | filter | |
|
|
||||||
| GRIS_600B+22 | 465 | 330−621 | 50 | 1.50 | 780 | none |
| GRIS_300V+10 | 590 | 330 (350)−660 (925) | 112 | 3.36 | 440 | none |
| GRIS_300V+10 | 590 | 445 (450)−865 (850) | 112 | 3.36 | 440 | GG435+81 |
| GRIS_300I+11 | 860 | 580 (600)−1100 (1050) | 108 | 3.24 | 660 | none |
| GRIS_300I+11 | 860 | 600−1100 (1050) | 108 | 3.24 | 660 | OG590+32 |
| GRIS_150I+27 | 720 | 330 (370)−650 (980) | 230 | 6.90 | 260 | none |
| GRIS_150I+27 | 720 | 445 (430)−880 (990) | 230 | 6.90 | 260 | GG435+81 |
| GRIS_150I+27 | 720 | 600 (590)−1100 (1050) | 230 | 6.90 | 260 | OG590+32 |
Notes. In parenthesis are the wavelength ranges actually used by F-VIPGI to provide the best-quality results. The listed values of resolution λ/Δλ are computed at the central wavelength and for a 1′′ slit.
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