SIMBAD references

Colin Drescher, Calamvale, Queensland, Australia, reports the discovery by Stuart Parker (Oxford, Canterbury, New Zealand) of an apparent supernova (red mag 15.8, as measured by Drescher) on 30-s unfiltered CCD images taken on Sept. 21.543 and 21.544 UT with a 35-cm f/6.3 Celestron C14 Schmidt-Cassegrain reflector (+ ST10 camera). The new object is located at R.A. = 1:38:54.59, Decl. = -42:35:08.8 (equinox 2000.0), which is 18" east and 2" south of the nucleus of the galaxy NGC 644 (as measured by Drescher). The variable was designated PSN J01385459-4235088 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gm based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011gm, unfiltered unless noted otherwise: Aug. 22.655, [19.4 (Parker); Sept. 23.384, 15.8 (Parker; position end figures 54s.57, 08".9; measured by Drescher); 23.614, R = 15.8 (Joseph Brimacombe, Cairns, Australia; position end figures 54s.56, 08".8); 23.760, 15.6 (Brimacombe; infrared filter, > 700 nm; position end figures 54s.58, 08".1); 24.613, 15.6 (Brimacombe; infrared filter); 25.586, 15.7 (C. Jacques and E. Pimentel, Belo Horizonte, Brazil; imaged with a GRAS telescope at Officer, Australia; limiting magnitude 18.0; position end figures 54s.59, 08".7, UCAC2 reference stars). Brimacombe's image from Sept. 23.6 is posted at website URL http://www.flickr.com/photos/43846774@N02/6176674798/. Brimacombe's image from Sept. 24 is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6194733505/.