Quote:
Originally Posted by RickS
Model for magnitude limit for an extended source? I still like to think I captured jet R4 of NGC 1097 at 27.6 mag/arcsec^2. All that data was from very dark sites...
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From say 22 mag/arcsec^2 dark skies at zenith, at F/9, with 9 micron pixels, and say 14hrs on Luminance, I reckon a 27.6 jet is believable ! (As well as an awesome effort !)
On my calculations, a 27.6 mag/arcsec^2 jet should have come out on the image with a SNR of 0.8. This isn't really enough for stellar sources, but, with only moderate stretching and noise reduction, is definitely discernible for something like an extended jet.