Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J12471442-1003473

PSN J12471442-1003473   2011 12 22.784 *  12 47 14.42 -10 03 47.3  16.7 U   17W   1N  N4682     6 0

2011 12 22.784

Discovered By Y. Hirose, Chigasaki, Kanagawa-ken, Japan, using a 0.35-m f/5.7 Schmidt-Cassegrain + unfiltered CCD (SBIG ST9XEi) under the limiting magnitude = 17.5.

2011 12 23.761

Mag.= 15.7 observed by T. Noguchi, Chiba-ken, Japan. Position end figures 14s.41, 46".3 on a combined four frames using 0.23-m f/6.3 Schmidt Cassegrain + unfiltered CCD (BITRAN BT-11E) with 50-s exposure under the limit mag.= 17.5. See an image at http://park8.wakwak.com/~ngc/images/PSNinNGC4682.jpg.

2011 12 24.838

Mag.= 16.0 observed by Y. Hirose, Chigasaki, Japan using same instrument at discovery.

24 12 2011

Padova-Asiago Spec ID: Type Ia Supernova several days before maximum.

2011 12 28.393

Mag.= 15.7 observed by S. Baroni, L. Buzzi, P. Concari, S. Foglia, G. Galli, M. Tombelli; remotely using a 0.18-m f/2.8 reflector at the Tzec Maun Observatory, Mayhill, NM, U.S.A.