Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J21142287+1514407

PSN J21142287+1514407   2012 12 21.5347*  21 14 22.87 +15 14 40.7  16.6 U    6E   2N  U11706    R 9

2012 12 21.5347

Zhijian Xu(Nanjing,Jiangsu,China) and Xing Gao (Urumqi,Xinjiang,China), report the discovery of a possible supernova (mag approximately 16.6) on a 40-s survey image (limiting mag about 18.5) taken by Xing Gao in Xingming Observation Sky Survey(C42) around Dec.21.53473 UT.using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ). The new object approximately located at R.A.=21h 14m 22s.87 Decl.=+15°14'40".7(equinox 2000.0). Which is about 5.8" east and 2" north of the center of the UGC 11706. Nothing is visible at this position on archival images taken on Dec.09(limiting mag 18.7),Dec.10(limiting mag 19.0) or on the DSS from Aug.14,1991(limiting mag about 19.9). NET USNO-A2.0 XM56ZX C2012 12 21.53473 21 14 22.87 +15 14 40.7 16.6 V C42 All images can be seen from: http://www.xjltp.com/XOSS/XM56ZX/XM56ZX.htm C42,Xingming Observatory,Mt. Nanshan. Observers Z.Xu,X.Gao,Measurers Z.Xu 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.

2012 12 22.0422

PSN detected at coordinates 21 14 22.83 +15 14 40.1 (UCAC3). Magnitude 16.2 U +/- 0.1 . Limiting magnitude 19.4 . Sum of 6 x 240-sec images. Nothing visible except edge of galaxy at these coordinates on DSS. Observer: R. A. Koff, Antelope Hills Observatory, Bennett, Colorado USA (H09). Image posted at: http://antelopehillsobservatory.org/SNpictures/PSNJ21142287+1514407final.jpg