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Fig. 3


STIS spectral tracings of the central star (in our direct line of sight) including the Fe ii λ4585,4631, He i λ4714, and N ii λ46014643 lines at similar phases during the 2003 and 2014 events. The Fe ii lines have almost disappeared in 2014. The He i and N ii lines have increased in emission strengths. They show similar velocity variations with phase. He ii is absent in 2003 at phase 1.008, but strongly present in 2014 at phase 3.009.

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