2004IAUC.8409....2M

Morrell, Folatelli, and Hamuy add that two spectra of SN 2004eo (cf. IAUC 8406), taken on Sept. 19.02 (range 455-960 nm) and Sept. 20.01 UT (range 385-920 nm), reveal that this is a type-Ia supernova displaying the characteristic Si II (635.5, 413.0, and 597.2 nm) and S II (545.4 and 564.0 nm) features. The minimum of the Si II 635.5-nm line yields expansion velocities of 12100 and 10000 km/s, respectively, on the two nights, assuming the NED host- galaxy recession velocity of 4707 km/s. Photometric observations obtained with the 1-m Swope telescope by S. Gonzalez and W. Krzeminski yield the following B-band magnitudes: Sept. 18.00, 17.59; 18.99, 17.13; 19.99, 16.74; 21.04, 16.47; 22.05, 16.21. These suggest that SN 2004eo will reach maximum light in the next 3 days or so.