Fig. 1.
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Prominence observed by IRIS and the MSDP at the south-west limb of the Sun on 2018 April 19. The panels show (a) a slit-jaw image of the Mg II line (SJI 2796), (b) Hα intensity in the line centre observed by MSDP showing the solar disc used to co-align MSDP and IRIS maps, and (c) Hα ± 0.3 Å intensity observed by MSDP. The dashed lines in panel a mark the field of view of the IRIS raster.
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