NGC 3576 (Car)

 

NGC3576haRGB.jpg (342306 Byte)

Technical data:     4"-Pentax SDUF II

                            ST10XME and CFW8 filter set and 3nm CS h-alpha filter

                            R (R+ha)GB     (R=12x300s; G=12x300s; B=12x300s, combined 1:0,9:1,6 and h-alpha=4x20minutes)

Comments:           The red nebulas of NGC3576 and NGC3603 are located in a very starrich area of the southern milkyway. This makes it very hard to
                            accentuate the nebula structures with all the stars in the foreground. See the real RGB image below:

NGC3576RGB.jpg (170706 Byte)

To get more contrast in the faint nebula parts and to suppress the stars the h-alpha image below was mixed into the RGB image. To hold the proper star colors
the h-alpha filter was combined with the red channel, each by 50%. Another problem were the disturbing blue halos around the stars. A minimum filter was
used for the blue channel and a color correction using the color picker in Photoshop was added. The final image on top of this page shows the result, nearly
all the blue halos are gone.

NGC3576halphaKlein.jpg (121400 Byte)

Authors: Volker Wendel and Bernd Flach-Wilken

 

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