SIMBAD references

G. Pignata, M. Cifuentes, Y. Apostolovski, and M. Vidal, Universidad Andres Bello; J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, F. Carrasco, R. Cartier, F. Forster, S. Silva, P. Sanchez, C. Hervias, and R. Ramirez, Universidad de Chile; F. Aros, Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University; G. Folatelli, IPMU, University of Tokyo; and D. Reichart, K. Ivarsen, J. Haislip, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of the CHASE project (which is part of the Millennium Center for Supernova Science collaboration), report the discovery of an apparent supernova (magnitude approximately 16.5) on an unfiltered image taken on Mar. 7.30 UT with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo. The new object is located at R.A. = 18:08:13.05 ± 0".2, Decl. = -62:23:54.2 ± 0".2 (equinox 2000.0), which is about 0".2 east and 10".8 south of the center of the galaxy IC 4674. Nothing is visible at this position on an image from the SuperCOSMOS Sky Survey taken in 1976 (limiting mag 22). The variable was designated PSN J18081305-6223542 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012bt based on the spectroscopic confirmation reported below. Additional magnitudes for 2012bt (assumed unfiltered CCD unless noted otherwise): Feb. 12.36, [18.5 (CHASE); Mar. 10.26, 16.2 (CHASE); 24.699, 17.3 (Joseph Brimacombe, Cairns, Australia; 41-cm RCOS telescope + STL6K camera + infrared filter, wavelength range > 700 nm; position end figures 13s.10, 53".8; image posted at website URL http://www.flickr.com/photos/43846774@N02/7012499211/); Apr. 1.786, 19.7 (Brimacombe; position end figures 13s.12, 53".8; red magnitude specified); 2.738, 18.7 (Brimacombe; infrared filter; position end figures 13s.15, 53".5).