2012CBET.3155....1K

A. Klotz, on behalf of the TAROT collaboration, reports the discovery of an apparent supernova (magnitude R = 14.6 ± 0.1) on June 24.27 using public images of the 0.25-m TAROT robotic telescope at La Silla, Chile. The new object is located at R.A. = 17:48:48.70, Decl. = -60:42:19.3 (equinox 2000.0), which is 17" west and 4" north of the nucleus of ESO 139-G28. The variable was designated PSN J17484870-6042193 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012db based on the spectroscopic confirmation reported below. Additional R-band CCD magnitudes for 2012db: June 6.302, [17.9 (Klotz, via TAROT); 21.269, 14.7 (Klotz, via TAROT; pre-discovery); 25.4, 15.5 (Ernesto Guido, Nick Howes, and Giovanni Sostero; remotely with the 2.0-m f/10 Ritchey-Chretien "Faulkes Telescope South" at Siding Spring; Bessell R filter; position end figures 48s.63, 19".0; UCAC-3 catalogue reference stars; an animation showing a comparison between their confirmation image and the archival red Digitized Sky Survey plate from 1990 is posted at website URL http://bit.ly/KneUqF, with an annotated confirmation image posted at http://bit.ly/MvHRUT).