2003IAUC.8063....2M

T. Matheson, P. Challis, and R. Kirshner, Center for Astrophysics, report that a spectrum (range 370-750 nm) of SN 2003Y (cf. IAUC 8062), obtained by M. Calkins on Jan. 31.34 UT with the Mt. Hopkins 1.5-m telescope (+ FAST spectrograph), shows it to be a type-Ia supernova near maximum. Several titanium features appear stronger than normal, indicating that this may be a subluminous event. Adopting the NASA/IPAC Extragalactic Database (NED) recession velocity of 5079 km/s for the host galaxy, the supernova expansion velocity is 10400 km/s for Si II (rest 635.5 nm). A spectrogram of SN 2003Z (cf. IAUC 8062), obtained on Jan. 31.36, shows it to be a type-II supernova. The spectrum consists of a very blue continuum with well-defined P-Cyg lines of hydrogen and helium. Adopting the NED recession velocity of 1289 km/s for the host galaxy, the expansion velocity derived from the minimum of the H_beta line is 6800 km/s.