Where Does Sinusititus Come From

M33, NGC 598

August 30, 2009
Pietrabbondante
The end of the holiday is approaching and it was really good last night for shooting, moisture, light wind.
The subject is the constellation
galaxy M33: Triangulum
Size: 68.7 'x 41.6 '
Magnitude: 5.70
Surface Brightness: 14.20
very beautiful object: a galaxy brazenly showing its spirals.
Along the arms, there are several nebulae, which are highlighted in the second half .. but no sign of a lack of sensitivity to red, but of inexperience in processing.
The shot was made from 1: 00 to 3:30 with

800IS Canon EOS 1000D focus on the
80ed sw sw HEQ5 led with 130 and spc900nc GuideMaster
focus occhiometrica

21 x 390 / 2 light frame (sum)
for a total of 10 dark
2h 15min (median)
flat 9 (median)

preprocessing and stacking process with PS
with Iris Iris and NeatImage
two different versions even in color balance, to more questionable for both.
The first report was made to extract as many details in the central area but did not lead to saturated star or galaxy, the second highlights maggiormante arms but saturates the core and the stars.




raw Unfortunately the trial version of Neat Image can only save JPG, the use of the program has cleaned up the bottom, but worse on the subject.
E 'have a gradient on the bottom that IRIS was unable to delete.