SN 2004ef:

This SN was discovered by Armstrong and Boles (IAUC 8399) on the rise.
The host galaxy UGC 12158 is at z=0.030988 (NED).

A spectrum obtained by Hamuy and collaborators ( IAUC 8403), indicates it is a young type Ia SN

This SN is the target of an HST follow-up campaign as part of the large type Ia-UV program, PI Filippenko.