Preliminary elaboration of NGC891

That’s our preliminary elaboration of NGC891 in Andromeda. This image is made stacking the data collected during yesterday’ session. The total integration time for this elaboration is about 1hr in which our acquiring system was collecting old photons from this galaxy. Here we made a stack (mean) of 7 photos (300s of exposure each) after the usual dark-flat calibration.

The signal in this acquisition was low, this was due to the bad trasparency of the atmosphere above us and little problems with our autoguiding system. We need more expositions in order to get a better signal to noise ratio (SNR) and achieve a better image quality. Tonight are planned more expositions of this object.

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