Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J02010888+5048156

PSN J02010888+5048156   2012 10 21.5788*  02 01 08.88 +50 48 15.6  17.8 U                       9 0

2012 10 21.579

V. Lipunov (SAI MSU) reports the discovery by P. Balanutsa of a possible supernova (magnitude 17.8) on the unfiltered images (60-sec exposures) from MASTER-Amur robotic telescope (0.40-m f/2.5 + 4Kx4K CCD) taken on 2012 Oct. 21.547 and 21.579 UT. Nothing is visible on the unfiltered image from the same telescope of 2012 Oct. 10.665 UT with magnitude limit 19.0m. There is a faint diffuse object within 1" of the PSN at the limit of digitized Palomar plates (~21m). The discovery and reference images are posted at this website URL: http://master.sai.msu.ru/static/OT/020108.88504815.6.png

2012 10 23.16233

PSN detected at coordinates 02 01 08.73 +50 48 15.3 (UCAC3). Magnitude 19.9 U +/- 0.4. Limiting magnitude 20.6. Sum of 25 x 120-sec images. Nothing seen at these coordinates on DSS. Observer: R. A. Koff, Antelope Hills Observatory, Bennett, Colorado USA (H09). Image posted at: http://antelopehillsobservatory.org/SNpictures/PSNJ02010888+5048156final.jpg

2012 10 23.445

This possible supernova was detected with 10 x 15 min images using a luminance filter Astrometry: RA 02 01 08.81 Dec 50 48 15.3 Photometry: 19.646 +/- 0.023 L These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information http://www.flickr.com/photos/43846774@N02/8120233358/