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Type determination for SN 2004gw and SN 2005D

ATel #391; Avishay Gal-Yam (Caltech)
on 16 Jan 2005; 01:26 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Avishay Gal-Yam (avishay@astro.caltech.edu)

Subjects: Optical, Supernovae

Referred to by ATel #: 392

Avishay Gal-Yam reports for the Caltech Core-Collapse Program (CCCP): We have observed the unidentified supernovae SN 1994gw (Puckett & Ireland et al., IAUC # 8459 ), and SN 2005D (Burket & Li, IAUC # 8464 ) with the DBSP spectrograph mounted on the 200" Hale Telescope at Palomar observatory. Preliminary analysis shows that SN 1994gw is of type I. Numerous features redward of 600 nm, as well as the overall red continuum, suggest it is a type Ic, but final reduction of the spectra is required for a secure ID. SN 2005D is a type II SN, showing broad Halpha and Hbeta lines.

CCCP webpage