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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 |