Automatic removal of fringes from EFOSC images

Snodgrass, Colin and Carry, Benoît (2013). Automatic removal of fringes from EFOSC images. Messenger, 152 pp. 14–16.



EFOSC, in common with many instruments with older CCDs, shows a fringe pattern in images taken at red wavelengths. These fringes are difficult to remove without significant manual adjustment for each individual frame, which is a time-consuming exercise, but necessary for reliable photometry of faint objects across the whole field of view. We present a simple technique to automatically remove fringes from CCD images, and provide scripts (available on the ESO website) to apply this to EFOSC data, or to any other images.

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