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Figure 1:
Ultraviolet spectra taken with IUE ( upper panel), FOS ( middle panel),
and STIS ( lower panel), all in full line.
The best model (dashed line) is at d=42.3 pc with
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Figure 2: The Fourier transform of the FOS data, obtained in 1996, for summed UV ( right panels) and zeroth-order data ( left panel). From top to bottom, we show the dominant mode around P=423 s (k=8, m=0), another periodicity at 464.2 s (k=9, m=0) identified by pre-whitening analysis, the noise after both subtraction, and the spectral window. The mode identification is described by Kepler et al. (2003). |
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Figure 3:
Chromatic amplitude changes the way the amplitudes normalized at
3400 Å changes with wavelength. The main mode at P=423.2 s and the
mode at P=464.2 s are most probably |
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Figure 4: The probability distribution of effective temperature derived by amplitude variation with wavelength, using the two periodicities detected with FOS data in 1996. The most probable value is 23 400 +3000-1800 K. |
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Figure 5:
The phases (times of maxima)
do not change with wavelength for detected periodicities
at P=423.2 s ( upper panel) and at P=464.2 s ( lower panel), in FOS data,
in accordance with an |
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