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Observations have yielded at least four unusual supernovae, which look spectroscopically very much like Type Ia SNe but have prominent narrow Hα emission lines, and have thus been dubbed, Type IIa. The following four SNe have been studied extensively: SN 1997cy, SN 1999E, SN 2002ic, SN 2005gj. We seek to shed some light on the source of the explosion by closely examining the environments of these SNe. We measure the metallicity and star formation rates for three of the host galaxies (the galaxy spectrum for the SN 2005gj host galaxy was still contaminated with emission from the SN) and compared them to those of more well-studied SNe. The measurements show low metallicity and star formation rates, the former does not agree well with classification as a Type Ia. While these measurements do not strongly indicate a particular progenitor system, they may be able to form a profile of possible galactic characteristics to look for future objects of this type

The Host Galaxies of Hybrid Type Ia/IIn Supernovae