SIMBAD references

A. Harutyunyan, Telescopio Nazionale Galileo (TNG); and F. Bufano and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, report that a spectrogram (range 350-780 nm, resolution 1.4 nm) of 2009at (cf. CBET 1718), obtained on Mar. 14.00 UT with the TNG (+ DOLORES), shows it to be a young type-II supernova. Assuming a recession velocity of 1503 km/s (Sloan Digital Sky Survey data release 4, 2005; via NED) for the host galaxy, the "GELATO" spectrum-comparison code (Harutyunyan et al. 2008, A.Ap. 488, 383; available at https://gelato.tng.iac.es) provides good fits to spectra of type-II supernovae near explosion. One of the fits, with SN 2008aw at ten days after discovery, can be seen at the following website URL: https://gelato.tng.iac.es/plots/plot_TiEepj0QK72n.png. The expansion velocity deduced from the H-alpha absorption is about 11700 km/s.