2005IAUC.8507....3M

N. Morrell, M. Hamuy, G. Folatelli, and M. Roth, Carnegie Supernova Project, report that a spectrogram (range 380-930 nm) of SN 2005aw (cf. IAUC 8499), obtained on Apr. 3.33 UT with the Las Campanas 2.5-m du Pont Telescope (+ WFCCD spectrograph), reveals this to be a type-Ic supernova, several days past maximum. The spectrum, dominated by strong Ca II 857.9-nm, along with O I 777.3-nm, Si II 635.5-nm, Na I 589.2-nm, Fe II 508.3-nm, and Mg II 448.1-nm, is very similar to those of supernovae 1994I and 1987M at 10-11 days after maximum light. An equivalent width of 0.13 nm was measured for the interstellar Na I D line arising in the host galaxy.