I've had a go at documenting the visual surface brightness of about 100 of the biggest and brightest spiral disk galaxies visible from Brisbane. It might be helpful when planning exposure times for dimmer galaxies.
The
pdf is here (about 7MB). It's useful to display the bookmarks in the pdf.
The galaxy magnitude maps are also up
here, with higher resolution collages for the
smaller,
medium, and
all galaxies.
I should be able to apply the same techniques to any other interesting galaxy images, especially with low surface brightness features (post a link here or PM if interested). I'd need a link to the original unstretched luminance stack, (green filter or unfiltered would also work). It would also be much easier if it was flat/background gradient corrected.