In the present study two full spectral atlases are analyzed, one emitted by a
solar active region, and the other in quiet Sun conditions. Both of them were
obtained by rastering over a area on the solar disk with
15 mirror positions and 15 slit positions using the
slit. For
each of the resulting 225 exposures of both sets of spectra the exposure time
was 50 s. The quiet Sun observation was obtained
on September 2
1996; the corresponding data file is known as
s4552. Its GSET_ID number is 41. The active region spectrum (s4554)
was taken immediately after the quiet Sun observation. Its GSET_ID is 47.
The two datasets were taken
close together
in order to eliminate any possible long term time variation of the GIS intensity
calibration between one observation and the other, so that the results obtained
from the two spectra could be directly compared.
Copyright The European Southern Observatory (ESO)