Tuesday, October 7, 2014

Third set of IRIS data

Some new measurements from data taken by IRIS on 12 September 2014

I've added an additional column to the data.  Column 11 is a measurement of the "power" in the given spectral line.  Here's a plot showing the MgII k and h power.  The x-axis is the power and the y-axis is the number of vertical arcseconds from the center of the Sun.

The total power corresponds as expected to the shape of the spectral lines: less power where the spectrum is dark, more power where the spectrum is bright ---

k (left) and h (right) MgII spectral lines

Although now apparent when looking at the image, the plot of total power shows that the h lines are typically brighter than the k lines.

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