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The Distance to Supernova 1998aq in NGC3982

Peter B. Stetson·Brad K. Gibson
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Abstract

The distance to NGC3982, host galaxy to the Type Ia supernova SN1998aq, is derived using 32 Cepheids discovered in archival multi-epoch Hubble Space Telescope observations. Employing recent Large Magellanic Cloud Cepheid period-luminosity relations and absolute zero point, we find a distance to NGC3982 of 20.5+/-0.8(r)+/-1.7(s) Mpc, including both random (r) and systematic (s) uncertainties, and ignoring any metallicity dependency in the Cepheid period-luminosity relation. Still unpublished light curve photometry promises to make SN1998aq one of the most important calibrators for the Type Ia supernova decline rate-peak luminosity relationship.

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Peter B. Stetson, Brad K. Gibson. 2001-10-02. The Distance to Supernova 1998aq in NGC3982. https://doi.org/10.1046/j.1365-8711.2001.05005.x

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