SIMBAD references

J. Newton and T. Puckett report the discovery of an apparent supernova (mag 17.3) on an unfiltered CCD image (limiting mag 19.0) taken with a 0.40-m reflector at Portal, AZ, U.S.A., on May 3.476 UT in the course of the Puckett Observatory Supernova Search. The new object is located at R.A. = 21h44m08.52, Decl. = +46:14:51.1 (equinox 2000.0), which is 13".8 west and 5".1 north of the center of UGC 11804. Puckett has posted an image of the variable at URL http://www.possdata.com/PSNJ21440852+4614511.jpg. The variable was designated PSN J21440852+4614511 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012co based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012co: Apr. 11, [19.1 (Puckett); May 13.422, 17.6 (Puckett); 15.428, 16.9 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 reflector + unfiltered Apogee AP-47p camera; limiting magnitude 17.8; position end figures 08s.40, 49".7; UCAC3 reference stars); 15.454, 18.1 (Joseph Brimacombe, Cairns, Australia; luminance filter; position end figures 08s.51, 50".8); 19.066, R_c = 17.2 (Massimiliano Martignoni, Magnago, Italy; 0.25-m f/10 reflector; position end figures 08s.53, 50".6). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/7244687060/.