Central Bureau for Astronomical Telegrams
CBAT "Transient Object Followup Reports"
PSN J06161835-2122329
PSN J06161835-2122329 2013 03 01.66 * 06 16 18.35 -21 22 32.9 14.4 R 51W 11N NGC2207 0 3
2013 03 01.66
From images taken on 2013 March 01.66 with the Zadko 1 meter telescope (Gingin observatory, Australia) E. Conseil reports the discovery of a supernova candidate located at R.A. = 06h16m18.35s, Decl. = -21o22'32.9" (equinox 2000.0), which is offset of 51" W and 11" S from the nucleus of NGC 2207. The image was R filtered and the magnitude was R=14.4. The presence of the candidate is confirmed on images taken on 2013 Feb. 28.66 (R=14.6) and 2013 Feb. 26.66 (R=15.3) with the same telescope. The candidate is not detected on 2013 Feb. 06.72 (limiting magnitude R~19). Using NED parameters for the NGC 2207 galaxy, we fit the three Zadko measures on the template provided by the supernova 2012fr. If we assume a Ia type, this is compatible with a supernova which could reach the B max on 2013 March 10.0 (Rmax~13.7) and with an explosion occured at about 2013 Feb 21.0. Spectroscopic follow-up is important to identify the type of the supernova candidate. Images at http://cador.obs-hp.fr/sn_tarot/PSN_J06161835-2122329/
2013 03 03.5
The initial photometry of PSN J06161835-2122329 used the star NOMAD-1 0686-0077348 as reference. Unfortunately, the Rmag of this star in the catalogue is wrong by about 3 magnitudes. As a consequence, all the magnitudes of the PSN were announced 3 magnitudes brighter. Please apply an offset of about 3 magnitudes fainter in the previous 2013 03 01.66 TOCP follow-up (i.e. the magnitude should be R=17.4 at the date of the discovvery 2013 March 01.66).
2013 03 03.185
This possible supernova in NGC 2207 was detected with 5 x 15 min images using a luminance filter Astrometry: RA 06 16 18.42 Dec -21 22 31.0 Photometry: 17.03 +/- 0.04 L (V as ref) These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information http://www.flickr.com/photos/43846774@N02/8526368927/
2013 03 03.88995
This object was observed by Federica Luppi and Luca Buzzi from Schiaparelli Observatory, Varese, Italy. In a stack of images totalling 5 minutes of unfiltered exposure time, the object has position end figures 18s.38, 32".9 and magnitude 16.8. Image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_N2207.jpg
