SIMBAD references

J. T. Parrent, Las Cumbres Observatory Global Telescope (LCOGT) and Dartmouth College; and D. A. Howell, LCOGT and University of California at Santa Barbara report that a CCD spectrogram (range 390-950 nm) of PSN J00563888-0954091 = SN 2012dt, taken with the Gemini Multi-Object Spectrograph (GMOS) on the 8-m Gemini North telescope on July 19.2 UT, shows that it is a type-IIP supernova several weeks after maximum light. A recession velocity of 5780 km/s is inferred from the emission lines of the host galaxy, NGC 309. Correcting for this redshift, the minimum of the H_alpha 656.3-nm absorption feature is found to be blue-shifted by about 7400 km/s. Comparisons to other spectra with "Superfit" (Howell et al. 2005, Ap.J. 634, 1190) show similar overlap with SN 1999em.