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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