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21 November 1980A Search For Faint Galactic Features
Trying to determine the size of galaxies and looking for tails and connections between galaxies can be intriguing. These very faint features are often buried in the film grain noise. Our study is of the NGC 3623, NGC 3627 and NGC 3628 region. The search for these faint features is complicated by film variation, sky background, microdensitometer drift and stars in the neighborhood of the galaxies. We address these questions and show that faint features can be found with the use of judicious data stretching and averaging along suspected features.
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Walter Matuska, Martin S. Burkhead, "A Search For Faint Galactic Features," Proc. SPIE 0264, Applications of Digital Image Processing to Astronomy, (21 November 1980); https://doi.org/10.1117/12.959816