SIMBAD references

R. Quimby and M. Sellers, University of Texas, add that SN 2006X appeared at mag about 15.3 on unfiltered CCD images taken on Feb. 7.31 UT with the 0.45-m ROTSE-IIIb telescope at the McDonald Observatory; the position for 2006X was measured as R.A. = 12h22m53s.88, Decl. = +15o48'31".9 (equinox 2000.0; uncertainty ± 0".6). SN 2006X was not detected in ROTSE-IIIb images taken Feb. 1.32 (limiting mag about 17.9) or in a co-addition of images taken between 2004 Dec. 11 and 2005 June 8 (limiting mag about 19.0).