The Polarimetric Performance of the SECCHI/COR2 Coronagraphs on the Stereo Mission

Details The Polarimetric Performance of the SECCHI/COR2 Coronagraphs on the Stereo Mission The Polarimetric Performance of the SECCHI/COR2 Coronagraphs on the Stereo Mission

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.1805b&link_type=abstract

American Astronomical Society, SPD meeting #40, #18.05; Bulletin of the American Astronomical Society, Vol. 41, p.845

Computer Science

Performance

Scientific paper

The COR2 coronagraphs have been observing the corona in polarized light since January 2007. The COR2 observations are used widely for estimates of the density and 3D structure of the corona and for the localization of coronal mass ejections. The characterization of the polarimetric performance of the instrument is very important for these analyses but also for observations involving the total brightness only. This is because the polarizer is placed permanently in the optical train of the telescope and therefore affects every COR2 image. In this paper, we give a report on our polarization calibrations, including instrumental polarization and provide estimates for the expected accuracy of COR2 polarimetric analysis on the estimation of coronal density and the localization of structures.

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