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Fig. 3.

image

Left: one of our first images of the Fe XIII corona at 1075 nm, taken with the c2 coronagraph (centered on the Sun) during a partial solar eclipse (2015-03-20). A coronal loop is clearly visible at 4 o’clock, and coronal jets on each side. The dark lunar disk (not centered on the Sun) blocks the upper left part of the solar ring and corona. At the two intersections, one can discern the circular shape of the Moon in front of the corona. Right: a more recent image of the solar corona at 1075 nm; a composite of 5 images taken with the c2 coronagraph between 07:39 and 07:57 on 2015-04-12, 6 s exposure time each. Images of the Fe XIII corona are now made on a regular basis at intervals of 30 min or 1 h every day, weather allowing.

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