The NGC 3582 nebula sits inside of the star forming region called RCW 57. The massive loops of ionized gas expelled by dying stars remind me of solar prominences. This image is comprised of data taken on the 2.2m scope at La Silla with the WFI instrument on June 16, 2002. Having only 2 channels of data to work with inspired some non-traditional color work.
7 x 5 min with H-alpha filter
4 x 30 s with Broadband Rc filter
Image was de-biased and flat fielded using IRAF with the esowfi tool. Channels were combined using PixInsight as:
red = halpha
green = 0.25*halpha + 0.75*Rc
blue = Rc
Combined channels were further processed in Photoshop to remove instrumental artifacts and tweak colors and crop.