This is the same spectrum used in xcsao
example 2.
Changes in the positions of night sky lines over 15 years
were used to find out about slow changes in spectrograph characteristics
This is the spectrum created in linespec
example 1.
This spectrum has a big cosmic ray hit which causes emsao to get the
wrong redshift. After the line is removed interactively, emsao finds
many emission lines and the correct redshift.