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Fig. 1

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Example of co-spatial and co-temporal images from both SuFI and IMaX instruments on board the Sunrise balloon-borne solar telescope. a) SuFI Ca ii H image. b) Average of two line-positions at −40 mÅ and  + 40 mÅ from the Fe I 5250.2   Å line-core. Plotted is the part of the full FOV overlapping with the SuFI Ca ii H image. c) Full field of view of the continuum position of the IMaX Fe I 5250.2   Å line. The red dashed-line in this image illustrates the co-aligned area in common with the SuFI Ca ii H image. The yellow box (solid-line) includes a sample Ca ii H BP studied here; its temporal evolution and parameter fluctuations are presented in Figs. 4 and 5, respectively. The common coordinate system adopted for the present analysis is given below and to the left of panels a and b, as well as above and to the right of panel c.

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