2012CBET.3101....1D

Colin Drescher, Calamvale, Queensland, Australia, reports the discovery of an apparent supernova (red mag 14.8) by Stuart Parker (Oxford, Canterbury, New Zealand) in the course of the Backyard Observatory Supernova Search on a 30-s unfiltered CCD image taken on Apr. 25.587 UT using a 35-cm Celestron C14 f/6.3 reflector (+ ST10 camera). The new object is located at R.A. = 18 41 07.25 Dec -41 47 38.4 (equinox 2000.0), which is 8" west and 4" north of the nucleus of the galaxy ESO 336-9. The variable was designated PSN J18410706-4147374 (based on a more poorly measured position) when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012ca based on the spectroscopic confirmation reported below. Additional magnitudes for 2012ca: 1990 July 21, [19.6 (Digitized Sky Survey red image; via Drescher); 2012 Apr. 27.421, 14.5 (Parker; position end figures 07s.25, 38".7; very low altitude; measured by Drescher); 28.467, 15.0 (Joseph Brimacombe, Cairns, Australia; infrared filter; position end figures 07s.22, 39".2; image posted at website URL http://www.flickr.com/photos/43846774@N02/7122296129/).