Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J00423804+4108417

PNV J00423804+4108417   2012 01 21.4185*  00 42 38.04 +41 08 41.7  17.1 U   71W  447S M31       N 0

2012 01 21.4185

Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report the discovery of a possible nova .(mag.= 17.1) in M31 on seven 40-s unfiltered CCD frames taken around 2012 Jan. 21.41853 UT, ( limiting magnitude = 19.3 ) using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera). (reference catalogue USNO B1.0) as follows Nothing is visible at this location on our past frames taken on 2012 Jan. 16.550 UT (limiting magnitude = 19.0). and Jan. 17.476 UT (limiting magnitude = 19.1) . We have checked in Minor Planets. Nothing is visible at the position of possible nova on the Digitized Sky Survey(POSS2/UKSTU) from 1986 Nov. 27 (limiting red mag 18.7) and 1993 Oct. 21(limiting infrared mag 17.9). the nearest star in M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) has position end figures 38s21, 43."5, distance 2."6, magnitudes V=22.0, B=23.2, R=21.3

2012 01 21.5210

This possible nova in M31 was seen with image taken on 2012 Jan. 21.52095UT. RA 00 42 38.06 Dec +41 08 41.6,Mag 17.0. Xingming Observatory,Mt. Nanshan(C42). Observers Z.Xu,X.Gao,Measurers Z.Xu 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.