SIMBAD references

T. Matheson, P. Challis, and R. Kirshner, Harvard-Smithsonian Center for Astrophysics, report that a spectrum (range 370-750 nm) of SN 2004al (cf. IAUC 8297), obtained by P. Berlind on Mar. 13.27 UT with the Mt. Hopkins 1.5-m telescope (+ FAST), shows it to be a type-II supernova. A narrow H_alpha emission line superposed on the spectrum of the supernova indicates a recession velocity of 4340 km/s for the host galaxy. The supernova expansion velocity, derived from the minimum of the H_beta line, is 6300 km/s. A spectrum of SN 2004ap (cf. IAUC 8300), obtained by Berlind on Mar. 13.25, shows it to be a type-Ia supernova about a week past maximum light. A spectrum of SN 2004ak (cf. IAUC 8297), obtained on Mar. 14.31, shows it to be a type-II supernova; the spectrum consists of a very blue continuum with P-Cyg lines of hydrogen and helium. Adopting the NED recession velocity of 7214 km/s for the host galaxy, the expansion velocity derived from the minimum of the H_beta line is 10700 km/s.