VLTI Visibility Calculator
Interferometry VisCalc Call For Proposal Mode Version P113
Description
FAQ
 
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NOTE 1: GRAVITY and MATISSE users should use the dedicated GRAVITY and MATISSE ETC for visibility calculations and their feasibility.

NOTE 2: The Shadowing in VisCalc is not up-to-date compared to the one used in GRAVITY and MATISSE ETCs.

NOTE 3: The baseline configurations in VisCalc are those valid up to P110. For the latest configurations, please refer to the VLTI Configurations Overview and to the GRAVITY and MATISSE ETCs.

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Target Definition

Target Coordinates:   Epoch: 2000
 
   Declination:  deg min sec   Start:   HOUR ANGLE    Timespan:  hours    Simbad Web App


Target Spectrum:

   Uniform:                       Constant over wavelength range
   Blackbody Temp:                 kelvin


Target Geometry:

   Single Disc:  Diameter:                 mas
   Gaussian:     FWHM:                     mas
   Binary Discs:  
                    Angle:                    deg    Angles counted from North to East  
                    Separation:               mas  
                    Diameter, Primary:        mas  
                    Diameter, Secondary:      mas
                    Brightness Ratio:        
    Fits: 
               Pixel Scale:   mas

            Supported formats: FITS images. Bits per pixel must be 32, Maximum pixel size 1000x1000. Angles counted from North to East.

Observation Setup


  Filter:                       

  Offered configurations:

VLTI Station Positions

VLTI station layout

Results


 All results 

 Show Input Parameters
 Show Input Target Image (fits file upload required)

 Shadowing
 Delay lines 

 Observation Time Window
 Target altitude
 Target Azimuth
 Airmass

 UV Tracks
 UV Tracks (Over Fourier Transform)
 UV Tracks (Constant Shape vs Wavelength)

 Visibility
 Visibility Squared
 Loss of Correlated Magnitude
 Baseline Length
 UV Azimuth

 Phase - Map 2D
 Phase - Baseline Specific
 Phase - Triplet Closure

 Finito (AMBER only)
 Illumination
       
This software has been prepared in collaboration between ESO and the Jean-Marie Mariotti Centre