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Figure
shows the integrated line
intensity of the strongest lines in the E230 setup as a function of the
observation time or the source elevation. The intensities were corrected
for the gain-elevation-curve (Peñalver 2012). The correction amounts to
about 15% for the lowest elevations of 25
.
The line intensities are relatively stable except between 44 and 54
where the intensities appear low compared to the remaining points. This
also corresponds to an observing time interval (8.5-9.25UT) between two
pointing observations. An error in the pointing correction could explain
this difference.