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Cygnus Loop in HOO 4 panel mosaic, Franz Eckhart
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Cygnus Loop in HOO 4 panel mosaic

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Cygnus Loop in HOO 4 panel mosaic, Franz Eckhart
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Cygnus Loop in HOO 4 panel mosaic

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Description

I took this picture over the course of 4 moonless nights from my hometown in Styria. It's the first time, that I´ve tried to combine images in to a mosaic. The picture consists of 4 panels. Each panel has a exposure time of 4hours. For the data I´ve used a Duonarrowband filter and worked on the extracted HA and O3 data separately. These pictures were then combined into HOO composites which  I then stitched together with APP. At first I was really unhappy with the result because the edges of each panel were clearly visible in the final mosaic, because  of light gradient from left to right on each panel, eventough I´ve used good flats for my flat field correction. With the help of the software "Graxpert", I was able to get rid of the gradients, which  wasn't´t too hard at all. The final processing was then done with PS and the help star X terminator.

CS Franzi

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Cygnus Loop in HOO 4 panel mosaic, Franz Eckhart