2012CBET.3168....1B

Greg Bock, Windaroo, Queensland, Australia, reports the discovery of a possible supernova (mag 14.4) by Stuart Parker (Oxford, Canterbury, New Zealand) on a 30-s unfiltered CCD image taken on June 26.60 UT with a 28-cm Celestron C11 reflector (+ ST10 camera); Bock measures the position of the new object as R.A. = 0:13:56.30, Decl = -70:01:40.7 (equinox 2000.0; measured by Bock using stars from the USNO-B and UCAC3 catalogues), with the offset given as 14' [sic] west and 19' [sic] south (though it is presumed that Bock meant 14" west and 19" south) of the nucleus of the galaxy PGC 926. Nothing is visible at this position on red and infrared images from the Digitized Sky Survey (limiting red mag > 19) or on Parker's image taken on 2012 June 9 (limiting red magnitude > 18.0). The variable was designated PSN J00135630-7001407 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012dk based on the spectroscopic confirmation reported below. Joseph Brimacombe, Cairns, Australia, reports magnitude 15.7 and position end figures 56s.47, 41".3 for PSN J00135630-7001407 = 2012?? from CCD images taken using an infrared filter (bandpass > 700 nm) with a 41-cm RCOS telescope (+ STL6K camera) on June 29.823; his image is posted at website URL http://www.flickr.com/photos/43846774@N02/7471310214/.