Central Bureau for Astronomical Telegrams
CBAT "Transient Object Followup Reports"
PSN J12355230+2755559
PSN J12355230+2755559 2012 01 11.54 * 12 35 52.30 +27 55 55.9 16.7 U 71W 103S N4559 L 1
2012 01 13.4794
L. Elenin (Lyubertsy, Russia) confirm an apparent supernova PSN J12355230+2755559. Object visible on 3x300sec images remotely taken at ISON-NM Observatory (Mayhill, NM, USA) with 0.45-m f/2.8 telescope + CCD (KAF09000) on Jan. 13.4794. Object located at 12h 35m 52s.28 +/- 0".1, +27d 55' 55".1 +/- 0".1 (NOMAD) and have magnitude about 16.4U (mag. limit ~19.2m). Possible supernova visible above relative faint SDSSCGB 754.2 galaxy. Image of PSN J12355230+2755559 available at http://spaceobs.org/images/TOCP/PSNJ12355230+2755559-20120113.png
2012 01 11.2507
Simone Leonini, Siena, Italy, report the pre-discovery by S. Leonini, G. Guerrini, P. Rosi and L.M. Tinjaca Ramirez of the supernova in NGC4559 (mag. about +16.5 – USNO B1 catalogue) on unfiltered CCD image (limiting mag. about +18.2) taken on 2012 January 11.25069 UT at the Montarrenti Observatory in the course of an automatic survey of the Italian Supernovae Search Project using a 0.53m f/8.7 Ritchey-Chretien telescope (+ Apogee Alta U47 CCD camera). The new object is located at R.A. 12h35m52.25s, Decl. +27degrees55arcmin55.9arcsec. (Astrometrica -equinox 2000.0). No stellar source is visible at the position of the apparent supernova in our past images including one on 2010 Apr. 29 (limiting mag. about +19.0) and it does not appear on Palomar Sky Survey infrared, red and blue plates (1997 Jun 01, F plate; 1950 Apr 10, J plate; 1990 Mar 23, N plate, limiting mag. +19.5). No known minor planets are marked in that position for the time of our observation. The image of the apparent supernova is posted at URL http://www.astrofilisenesi.it/public/Sne/Uploads/NGC4559 psn.jpg
2012 01 13.449
PSN J12355230+2755559 This possible supernova in NGC 4559 was seen with 3 x 10 min images using a red filter Astrometry: RA 12 35 52.29 Dec 27 55 55.9 Photometry: 17.7 +/- 0.5 R These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/6691755169/
2012 01 14.1
A spectrum taken at the TNG shows that the object is "SN impostor" very similar to 2009ip (Pastorello, Cappellaro, Benetti INAF OAPD & Harutunyan TNG)
2012 01 14.529
Follow-up magnitude: 18.6 L These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/6700504855/
