This page is for quick reference. Please consult the DeVeny Users Manual for more detailed information.
DeVeny Gratings:
ID | Ruling (g/mm) | Blaze (Å) | Dispersion (Å/pix) | Free Spectra Range (Å) | Comments |
|---|---|---|---|---|---|
| DV1 | 150 | 5000 | 4.3 | 8800 | KPNO 201 |
| DV2 | 300 | 4000 | 2.17 | 4440 | KPNO 09 |
| DV3 | 300 | 6750 | 2.17 | 4440 | KPNO 32 |
| DV4 | 400 | 8500 | 1.66 | 3400 | |
| DV5 | 500 | 5500 | 1.33 | 2720 | KPNO 240 |
| DV6 | 600 | 4900 | 1.14 | 2320 | KPNO 26new |
| DV7 | 600 | 6750 | 1.14 | 2320 | KPNO 35 |
| DV8 | 831 | 8000 | 0.80 | 1630 | KPNO 47 |
| DV9 | 1200 | 5000 | 0.58 | 1180 | |
| DV10 | 2160 | 5000 | 0.33 | 670 | 4500Å red tilt limit |
DeVeny Filters:
| Wheel | Position C | Position 1 | Position 2 | Position 3 | Position 4 |
|---|---|---|---|---|---|
"Front" pre-slit | Clear | Neutral Density 2.5 mag | Neutral Density 5.0 mag | Neutral Density 7.5 mag | EMPTY |
"Rear" post-slit | Clear | Order Sorting GG420 | NOT INSTALLED* GG495 | Order Sorting OG570 | NOT INSTALLED (e.g., WG360?) |
*The GG495 filter has been removed from the instrument; replacement plan TBD. (2021Apr29)
DeVeny Calibration Arc Lamps:
Ne - Neon (stabilizes within seconds) – Video illustrating stabilization
Ar - Argon (stabilizes within 1 minute) – Video illustrating stabilization
Hg - Mercury (stabilizes in 1-3 minutes) – Video illustrating stabilization
Cd - Cadmium (stabilizes in ~6 minutes) – Video illustrating stabilization
Example Grating Settings:
| Grating | Tilt Angle | Central Wavelength | Range | Filter | Notes |
|---|---|---|---|---|---|
DV1 | 21.00º | 7200 Å | 2600 Å − 11,600 Å | GG420 | O(2) at λ > 8400 Å |
| DV2 | 22.54º | 5200 Å | 3000 Å − 7400 Å | GG420 | |
| DV3 | 24.05º | 6750 Å | 4500 Å − 9000 Å | GG420 | O(2) at λ > 8400Å |
| DV3 | 25.28º | 8000 Å | 5800 Å − 10,200 Å | OG570 | |
| DV4 | 26.06º | 6600 Å | 4900 Å − 8300 Å | GG420 | |
| DV4 | 27.89º | 8000 Å | 5800 Å − 10,200 Å | OG570 | |
| DV5 | 24.62º | 4400 Å | 3000 Å − 5800 Å | Clear | |
| DV5 | 27.24º | 6000 Å | 4600 Å − 7400 Å | GG420 | |
| DV5 | 29.04º | 7100 Å | 5700 Å − 8500 Å | GG495 | |
| DV6 | 27.04º | 4900 Å | 3750 Å − 6050 Å | Clear | |
| DV7 | 31.19º | 7000 Å | 5850 Å − 8150 Å | GG495 | |
| DV8 | 39.51º | 8000 Å | 7200 Å − 8800 Å | OG570 | |
| DV9 | 33.20º | 4000 Å | 3400 Å − 4600 Å | Clear | |
| DV9 | 37.27º | 5000 Å | 4400 Å − 5600 Å | Clear | |
| DV9 | 42.30º | 6200 Å | 5600 Å − 6800 Å | GG495 | |
| DV9 | 46.65º | 7200 Å | 6600 Å − 7800 Å | OG570 | Collimator rails at lower limit |
| DV10 | 44.28º | 3700 Å | 3370 Å − 4030 Å | Clear | Collimator rails at lower limit |
| DV10 | 48.0º | 4170 Å | 3840 − 4500 | Clear | Red tilt limit |