Rotating Wolf-Rayet stars in a post RSG/LBV phase - An evolutionary channel towards long-duration GRBs?

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Fig. 1

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Examples for absorption features in C iv 1548, 1550 from IUE high-resolution data. The line widths given in Table 4, are indicated as grey shaded areas. The broad feature in the spectrum of WR 16 shows a similar variability as WR 40 (cf. Fig. 2), and is thus likely of intrinsic nature.

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