Abstract
ABSTRACT NGC3627. SN 1989B appears to be a typical Type Ia supernova with an envelope expansion velocity of ~10,600 km s-1^ near maximum light. The presence of diffuse interstellar bands and Na I absorption attributable to the interstellar medium (ISM) of NGC 3627 indicates significant obscuration of the supernova. If relations between the strengths of these features and E (B-V) derived for the Galaxy can be applied to the ISM of NGC 3627, the indicated E(B-V) is ~0.8 for SN 1989B.
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