SIMBAD references

F. Taddia, Stockholm University, reports on optical spectroscopy of PSN J22440166+1551493 = SN 2012em, which was obtained with the Nordic Optical Telescope (+ ALFOSC; range 350-900 nm, resolution 0.8 nm) on Sept. 11.1 UT. Cross-correlation of the spectrum with a library of supernova spectra using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) shows 2012em to be most similar to the type-Ia supernova 1991bg close to maximum light.