Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J00422631+4213316

PNV J00422631+4213316   2013 03 02.5704*  00 42 26.31 +42 13 31.6  17.9 U  203W3443N  M31       R 1

2013 03 02.5704

POSSIBLE NOVA IN M31 Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China),report the discovery of a possible nova (mag approximately 17.9) on several 40-s survey images (limiting mag about 18.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 02.57039 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). the new object approximately located at R.A.=00h42m26.28s +42d13'31".9 (equinox 2000.0). Which is about 203.1" west and 3443.1" north of center of the NGC224(M31). Prediscovery images taken on Feb. 19.58119 (limiting mag 18.5), Feb. 20.57627 (limiting mag 18.0), Feb. 21.56854 (limiting mag 18.0) and Mar. 01.57823 (limiting mag 18.5). Nothing is visible at this position on archival images taken on Feb 07.59203 (limiting mag 18.5) or Jan 31.56422 (limiting mag 19.0). NET USNO-A2.0 XM42ZJ C2013 02 19.58119 00 42 26.30 +42 13 32.5 17.3 V C42 XM42ZJ C2013 02 20.57627 00 42 26.39 +42 13 31.8 17.3 V C42 XM42ZJ C2013 02 21.56854 00 42 26.22 +42 13 32.0 17.5 V C42 XM42ZJ C2013 03 01.57823 00 42 26.28 +42 13 31.9 17.7 V C42 XM42ZJ C2013 03 02.57039 00 42 26.31 +42 13 31.6 17.9 V C42 All images can be seen from: http://www.xjltp.com/XOSS/XM42ZJ/XM42ZJ.htm C42 Xingming Observatory, Mt. Nanshan. Observers Z.Jin,X.Gao ,Measurers Z.Jin. 0.356-m f/6.9 Schmidt-Cassegrain telescope and CCD.

2013 03 03.105

This possible extragalactic nova in M31 was detected with 3 x 15 min images using a luminance filter Astrometry: RA 00 42 26.27 Dec +42 13 32.3 Photometry: 17.94 +/- 0.14 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@N02/8530091608/