Hatena::Groupkanatatmp

KANATA ObsLog

2009-09-26

[] SN 2009ig : B-band excess ?

f:id:kanataobslog:20090927011639p:image

We update the light curve of Type Ia SN 2009ig. The B-band light curve indicates the very slow evolution after maximum. But V-band and R-band light curves are well consistent with those of typical Ia SN 2005cf. Moreover, the secondary maximum of SN 2009ig is clearly different from typical SN 2005cf. Such a phenomena is rare for a SN Ia. The B-band excess seen in several Type Ia SNe may be related the interaction with a circumstellar material. We will continue our observation.