Mark Phillips, Mario Hamuy, and Sergio Gonzalez, Carnegie Observatories, report
that a spectrum (range 380-920 nm) of SN 2004ac (cf. IAUC 8295), obtained on March 25.39 UT
with the Las Campanas Observatory Dupont 2.5-m telescope (+ WFCCD), shows
that this is a Type Ia supernova about 2.5 months past maximum light.