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Table 4.
Filling factors fS and mean temperatures Tmean for each set of spectral observations.
| Set | Lines | fS | Tmean (K) |
|---|---|---|---|
| Jul–Aug 1999 | 3,4,5,6 | 0.0725 | 5796 |
| Sep 1999 | 3,4,5,6 | 0.0606 | 5771 |
| Oct 1999 | 3,4,5,6 | 0.0318 | 5809 |
| Jul–Aug 2001 | 3,4,5,6 | 0.0489 | 5774 |
| Aug 2002 | 3,4,5,6 | 0.0455 | 5743 |
| Jul–Aug 2004 | 1,2,6 | 0.0523 | 5857 |
| Jul 2005 | 3,4,5,6 | 0.0515 | 5790 |
| Aug–Sep 2006 | 1,2,6 | 0.0693 | 5764 |
| Jul 2007 | 3,4,5,6 | 0.0504 | 5776 |
| Sep 2008 | 1,2,6,7 | 0.1329 | 5707 |
| Aug–Sep 2009 | 1,2,6,7 | 0.1067 | 5778 |
| Jul 2010 | 1,2,6,7 | 0.1448 | 5721 |
| Aug–Sep 2012 | 1,2,6,7 | 0.1228 | 5743 |
| Aug 2013 | 1,2,7 | 0.1018 | 5704 |
| Sep 2013 | 3,4,5,6 | 0.0421 | 5752 |
| Aug 2014 | 3,4,5,6 | 0.0550 | 5725 |
| Jul 2015 | 3,4,5,6 | 0.0590 | 5706 |
| Jun 2016 | 3,4,5,6 | 0.0706 | 5697 |
| Jun 2017 | 1,2,6 | 0.1329 | 5626 |
Notes. The lines used in each set are numbered as in Table 3.
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