Fig. 3
Comparison of the Na I D1 profile of V407 Cyg (dash) with the S II 1257 Å resonance line in HD 202347 (solid, archival HST/STIS G140H spectrum, program O5G3), along a close line of sight. The high (negative) radial velocity components are from the Mira wind. The V407 Cyg spectrum, using the data from the first NOT observation, has been scaled for display; flux units for the HST/STIS spectrum are erg s-1 cm-2 Å-1
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