Stacking additional exposures in DSS actual made image worse

Questions and answers about processing in StarTools and how to accomplish certain tasks.
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midwayexpress
Posts: 69
Joined: Sat Jan 12, 2013 9:42 pm

Stacking additional exposures in DSS actual made image worse

Post by midwayexpress »

The night before last I took two hours of SH2-101 with my Atik 420c and hyperstar. However, the resulting image was very dim. http://www.astrobin.com/111145/

So last night I tried to add 2 more hours of exposure time. The resultant DSS stack is actually noisier than the first version with only two hours. I took 20 flats and 20 darks at the correct temperature. See actual stacks below.

2 hour stack
https://dl.dropboxusercontent.com/u/38638640/sh2101.TIF

4 hour stack
https://dl.dropboxusercontent.com/u/386 ... sh2101.TIF
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