Density diagnostics derived from the O iv and S iv intercombination lines observed by IRIS

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Fig. 3

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Overview of the AR NOAA 12356 as observed by the IRIS SJI in the 1400 Å passband at around 19:00 UT. See also the movie that shows the evolution of the SJI 1400 images over time. The green box overplot to the SJI image indicates the field of view of the IRIS spectrograph images in Fig. 4.

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