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Signal to Noise Ratio (SNR) estimates

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Tim Haymes's picture
Last seen: 4 hours 2 min ago
Joined: 13/06/2014 - 21:53
Signal to Noise Ratio (SNR) estimates

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 !


djswan2002's picture
Last seen: 5 hours 39 min ago
Joined: 20/04/2017 - 19:58
Photometry freeware

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

Grant Privett's picture
Last seen: 2 hours 52 min ago
Joined: 28/12/2014 - 18:30

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.

Xilman's picture
Last seen: 8 hours 1 min ago
Joined: 24/03/2018 - 15:17
Personally I use MaximDL but

Personally I use MaximDL but that is an expensive option.