Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J00152561+1719119

PSN J00152561+1719119   2011 08 29.7202*  00 15 25.61 +17 19 11.9  17.9 U   76W  31S  N57       I 3

2011 08 29.71

Discovered by K. Itagaki who found the pre-discovery observations on his survey frames on 2011 Aug. 26.66 (mag.= 17.6) and on Aug. 28.56 (mag.= 17.7) UT. See a discovery image at http://www.k-itagaki.jp/images/psn-0057.jpg.

2011 08 30.697

This possible supernova in NGC 57 was seen with 4 x 600 sec images using an infrared filter. Astrometry: RA 00 15 25.63 Dec 17 19 12.2 Photometry: Mag 18.1 +/- 0.3 IR/R These data were collected by Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/6098209135/

2011 08 21.676

unfiltered mag about 17.5. Pre-discovery observation by K. Nishimura, Ebetsu, Hokkaido, Japan, using 0.35-m refl. + CCD. (H. Yamaoka)

2011 09 07.485

Mag.= 17.9 U; 0.23-m Schmidt Cassegrain + unfiltered CCD (BITRAN BT-11E); Position end figures 25s.50, 11".5 on a composed image from eight frames taken by each 50-second exposure under the limiting magnitude = 18.5. T. Noguchi, Japan.