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Paper: The SARG very high resolution spectrum of P Cygni
Volume: 233, P Cygni 2000: 400 Years of Progress
Page: 109
Authors: Rossi, C.; Viotti, R. F.; Gaeng, T.; Gratton, R.; Claudi, R.; Farisato, G.; Martorana, G.; Rebeschini, M.; Bonanno, G.; Bruno, P.; Cali, A.; Cosentino, R.; Scuderi, S.; Timpanaro, M. C.; Desidera, S.
Abstract: We present here the results of a preliminary analysis of the very-high-resolution spectrograms (R=86,000) of P Cyg obtained with the new SARG spectrograph attached to the Italian National Telescope (TNG). A marked change in the Hα profile is noticed with respect to the May 1996 observations of Gäng (2000). We also analyse the effect of the telluric lines on the spectral appearence by comparison with lower-resolution observations, and find that it can simulate weak-line variability.
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