Removal of spectro-polarimetric fringes by 2D pattern recognition
Casini, R., Judge, P. G., & Schad, T. A. (2012). Removal of spectro-polarimetric fringes by 2D pattern recognition. The Astrophysical Journal, 756. doi:10.1088/0004-637X/756/2/194
We present a pattern-recognition-based approach to the problem of the removal of polarized fringes from spectro-polarimetric data. We demonstrate that two-dimensional principal component analysis can be trained on a given spectro-polarimetric map in order to identify and isolate fringe structures... Show moreWe present a pattern-recognition-based approach to the problem of the removal of polarized fringes from spectro-polarimetric data. We demonstrate that two-dimensional principal component analysis can be trained on a given spectro-polarimetric map in order to identify and isolate fringe structures from the spectra. This allows us, in principle, to reconstruct the data without the fringe component, providing an effective and clean solution to the problem. The results presented in this paper point in the direction of revising the way that science and calibration data should be planned for a typical spectro-polarimetric observing run. Show less