Fig. 1
The slit-jaw image recorded on October 21, 2010 with a 580 × 580 pixel CCD camera using an interference filter with 1.5 Å bandwidth centered on the Ca ii 3933 Å K line. The spot is in the NOAO region 1113 at W20N16. The dark vertical line represents the slit, the dark horizontal lines delimit the 0″ to 184″ spatial range imaged on the ZIMPOL sensor, and the spatial scale in arcsec is indicated. The slit is oriented such that it is parallel to the heliographic polar axis.
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