SIMBAD references

F. Ciabattari and E. Mazzoni, Borgo a Mozzano Italy, report the discovery of an apparent supernova on unfiltered CCD images (limiting mag about 19) obtained on Apr. 26.94 (when the object was at mag 17.2) and 27.88 UT (at mag 17.1) with a 0.5-m reflector. The new object (which was designated PSN J12312490+2907500 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011ca based on the spectroscopic report below) is located at R.A. = 12:31:24.94, Decl. = +29:07:50.6 (equinox 2000.0; astrometry with respect to UCAC2 stars), which is 24" east and 20" south of the center of the galaxy NGC 4495. Additional magnitudes for 2011ca (via unfiltered CCD unless otherwise noted, and via Ciabattari and Mazzoni unless otherwise noted): 1990 Jan. 29, [20.3 (Digitized Sky Survey; Palomar F plate); 1990 Mar. 23, [20.3 (DSS; Palomar J plate); 2011 Apr. 5, [19.1; 28.190, 16.8 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera at the New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end figures 25s.00, 50".9). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/5668046246/. Supernovae 1994S and 2010lo also appeared in NGC 4495.