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Planned observational parameters of MUSE
This is an overview of the planned observational parameters of MUSE.
| General Properties | |
| Telescope | |
| Focus | Nasmyth B VLT-UT4 |
| AO | |
| Type | Ground layer |
| Deformable Secondary Mirror | 1170 actuators |
| Laser guide stars | 4x 5-10 Watt |
| AO+VLT throughput | 61.0% @ 480 nm |
| 54.8% @ 750 nm | |
| 61.3% @ 930 nm | |
| Instrument | |
| Type | Integral Field Spectrograph |
| Number of modules | 24 |
| Detectors | 40962 pixels of 15 µm |
| Data cube size | 1570 MB |
| Wide Field Mode | |
| Nominal Wavelength Range | 480-930 nm |
| Extended Wavelength Range | 465-930 nm |
| Excluded wavelength in AO | 584-594 nm |
| Resolving Power | 1770 @ 480 nm |
| 2850 @ 750 nm | |
| 3590 @ 930 nm | |
| Field of view | 59.9x60.0 arcsec2 |
| Spatial sampling | 0.20x0.21 arcsec2 |
| Spatial resolution without AO in median seeing | 0.75 arcsec @ 480 nm |
| 0.63 arcsec @ 750 nm | |
| 0.59 arcsec @ 930 nm | |
| Spatial resolution with AO in median seeing | 0.61 arcsec @ 480 nm |
| 0.45 arcsec @ 750 nm | |
| 0.41 arcsec @ 930 nm | |
| Instrument throughput | 14.8% @ 480 nm |
| 46.7% @ 750 nm | |
| 14.9% @ 930 nm | |
| AO condition of operation | 70%-ile |
| Sky coverage with AO | 70% @ galactic pole |
| 99% @ galactic equator | |
| AO Tip/tilt guide star location | 4 arcmin diameter |
| AO Tip/tilt gide star magnitude | 17.5 (V band) |
| Limiting AB magnitude in 80 h & AO (unresolved source) | 24.4 @ 480 nm |
| 24.9 @ 750 nm | |
| 24.0 @ 930 nm | |
| Limiting Flux in 80 h & AO (10-19 erg.s-1.cm-2, unresolved source) | 18.4 @ 480 nm |
| 4.2 @ 750 nm | |
| 6.8 @ 930 nm | |
| Narrow Field Mode | |
| Wavelength Range | 480-930 nm |
| Excluded wavelength | 584-594 nm |
| Resolving Power | 1750 @ 480 nm |
| 2775 @ 750 nm | |
| 3450 @ 930 nm | |
| Field of view | 7.42x7.43 arcsec2 |
| Spatial sampling | 0.025x0.026 arcsec2 |
| Spatial resolution in good seeing | 0.064 arcsec @ 480 nm |
| 0.054 arcsec @ 750 nm | |
| 0.052 arcsec @ 930 nm | |
| Strehl ratio in good seeing | 4.5% @ 480 nm |
| 23% @ 750 nm | |
| 37% @ 930 nm | |
| Instrument throughput | 13.5% @ 480 nm |
| 43.7% @ 750 nm | |
| 13.8% @ 930 nm | |
| AO Tip/tilt guide star location | 5 arcsec diameter |
| AO Tip/tilt gide star magnitude | 17.5 (J band) |
| Limiting AB magnitude in 1 h (extended/unresolved) | 16.2/21.2 @ 480 nm |
| 17.1/23.2 @ 750 nm | |
| 15.6/22.0 @ 930 nm | |
| Limiting Flux in 1 h (10-19 erg.s-1.cm-2, extended/unresolved) | 27758/328 @ 480 nm |
| 4323/18 @ 750 nm | |
| 11414/39 @ 930 nm |
