DSS7 + ST402 image question

Discussion in 'Spectrographs' started by Jerry Warner, May 8, 2016.

  1. Jerry Warner

    Jerry Warner Standard User

    Joined:
    May 8, 2016
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    What kind of sky image am I seeing on my monitor with the DSS7+ST402? A mirrored image (left to right) or a mirrored and inverted image? It is necessary to know the orientation to be able to identify stars in the FOV of the DSS7 + ST402 using a CGE14. Thanks for any advice.
     
  2. Tim Puckett

    Tim Puckett Guest

    Here is some archived information on the DSS7 below and attached.
    DSS-7 Specifications and Comparison to SGS
    Alan Holmes
    9/7/2004

    DSS-7:
    Input F/number: F/10
    Dispersion: 5.4 Angstroms per Pixel
    Projected width of narrowest slit on CCD: 25 microns
    Resolution with 9 micron pixels (ST-7): 15 Angstroms
    Spectral Range (ST-7): 4130 Angstroms
    Blur in Direction perpendicular to slit: Approximately 25 microns
    Lower resolution slit choices: 50,100, and 200 microns​
    SGS:
    Input F/number: F/6.3 x F/10
    Dispersion (high resolution): 1.07 Angstroms per Pixel
    Dispersion (low resolution): 4.3 Angstroms per Pixel
    Projected width of narrowest slit on CCD: 18 microns
    Resolution with 9 micron pixels (ST-7): High = 2.4 Angstroms
    Low = 9 angstroms
    Spectral Range (ST-7): High = 820 Angstroms
    Low = 3290 Angstroms
    Blur in Direction perpendicular to slit: Approximately 100 microns
    Lower resolution slit choices: 72 microns
    Relative Sensitivity of DSS-7 to SGS for dim extended objects near H-alpha: 5 to 10X

    I hope this helps.
     

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