by Christoph Petermann

Some information

The evening of the 2 February has been VERY windy, but the sky was clear after a long period of rain. I decided to take out the refractor GP102m (= VIXEN 102mm f=1000mm) and the new notebook with my PS39 webcam, which had been unused for quite a while.

First I took a series of images of Jupiter in BMP format with a little program called QCfocus. Later I added these images with the fabulous GIOTTO program and processed them with IRIS.

Further series I took with the webcam functionality in IRIS only with the advantage of producing FITS format files at once.

Then I decided to take M42 and M81 with 32 * 32 * 0.25sec exposures, with a complete integration time of 256 seconds. I made a set of dark fields before, which I subtracted from each image later. All images throughout the session were treated with IRIS and Berry's AIP4WIN - the program is very good, but crashes regulary on my notebook.

The Saturn image was the result of a very shaky session at the end, when winds freshed up severely.

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