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Paper: Calibration of the SOT Polarization
Volume: 369, New Solar Physics with Solar-B Mission
Page: 39
Authors: Ichimoto, K.; Suematsu, Y.; Shimizu, T.; Katsukawa, Y.; Noguchi, M.; Nakagiri, M.; Miyashita, M.; Tsuneta, S.; Tarbell, T.D.; Shine, R.A.; Hoffmann, C.M.; Cruz, T.; Lites, B.W.; Elmore, D.F.; SOT Team
Abstract: Calibration of SOT polarization property was performed using natural sunlight and well calibrated sheet polarizer (linear and circular) placed on the entrance of the telescope. The polarimeter response matrices were determined for the spectropolarimeter (SP) and the narrowband filter imager (NFI), and it is shown that they are well behave as predicted and constant over the field of view. The crosstalk between I,Q,U,V will be suppressed to the negligible level at the photometric accuracy of 10−3 after the calibration with the obtained matrices. The sensitivity of SOT on linear and circular polarizations at each wavelength observed by NFI are also obtained.
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