SN 2004et:<br>
<br>
This SN was discovered by Stefano Moretti 
<a href="http://cfa-www.harvard.edu/iauc/08400/08413.html#item1"> 
(IAUC 8413)</a> on September 22, 2004, and was absent on September 15, 
2004, so discovered shortly after explosion.<br> 
<br>
The host galaxy 
<a href="http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=ngc+6946&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES">NGC 6946</a> 
is at z=0.000160 (NED).<br>
<br>
The same IAUC also suggests it is of type II, confirmed later by Filippenko and co.
<br>
<br>
<a href="http://arxiv.org/abs/astro-ph/0412487">This paper</a> by Li and collaborators, discusses the progenitor of
SN 2004et, and also provides light curves, spectra and a photometric calibration.