Signal to Noise Ratio (SNR) estimates

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  • #574650
    Tim Haymes
    Participant

    I would like to estimate SNR in my FITS images before observations start. What do imagers use to make this estimate?  A free software tool would be nice.  I do have AstroArt5

    This image shows a cross section through Europa before occulting a dim star.  Eyeball tells me the STN >100,  but a better estimate would be good  [ C11, W25 filter, 200ms, QHY174m ] – Thank you !

     

    #582670
    David Swan
    Participant

    Hi Tim. AstroImageJ (often seen contracted as AIJ) – built on Image J, which is used widely in research – does it quite nicely.

    #582671
    Grant Privett
    Participant

    AstroArt7 does too – but obviously you would need a paid upgrade. Though AA7 is impressive and, most importantly, has a nice scripting language which is useful.

    #582672
    Paul Leyland
    Participant

    Personally I use MaximDL but that is an expensive option.

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