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Marco,
I pointed out your image of N5128 to Professor Kenneth C. Freeman of ANU, a man who, with Peng et al., studied the outermost regions of NGC 5128 and found that there was a distinct "disky" or relatively rapidly rotating component there.
(Dr Freeman is one of the great extragalactic astronomers of our time, and he is consistently one of Australia's most cited scientists)
We both agreed that your image is very comparable to the deep "co-added Schmidt films" image of David Malin, which was the deepest image of NGC5128 that was available in the 1980s.
Malin had to go to great lengths with a big Schmidt telescope in order to get results similar to that which you have got with a CCD and modest aperture.
cheers,
Robert
Oh, one more thing....Freeman is interested in one of the other images at your website, as it shows more than any of his imaging material taken with big telescopes.....I will email you about this.
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