January 2013: M33

M33 is a member of our local group of galaxies. The light of this beast came into my CCD after travelling for about 2,8 milion years.

This is a mosaic of two pieces, as M33 is a wide target. Each one of the pieces consists of LRGB subs of 5 minutes.

Processing has been difficult. As M33 lowered as the imaging session was ongoing, gradients appeared in the subs. Also, the B channel was affected by this lowering. All of this created uneven gradients between frames. As a result, the image appears noisy. Although I’ve tried to fix as much noise as I could, damaging the weakest parts of the galaxy was a potential damage, so I kept noise reduction in somehow a balance.

The core of the galaxy has been cleaned and exposed with wavelets processing. And the color saturation has been pushed to show the active regions in the galaxy. These regions appear as red knots.

M33 new processing

Go to this object description and this image technical detail.