Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J00415937+4117026

PNV J00415937+4117026   2015 10 02.7530*  00 41 59.37 +41 17 02.6  17.6 U  507W  54N  M31       N 0

2015 10 02.7530

Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report the discovery of a possible nova? .(mag.= 17.6) in M31 on seven 60-s unfiltered CCD frames taken around 2015 Oct. 02.75300 UT, ( limiting magnitude = 19.5 ) using a 0.50-m f/6.8 reflector(+FLI 1001E camera). as follows Nothing is visible at this location on our past frames taken on 2015 Sep. 22.775 UT (limiting magnitude = 18.9) and Sep. 27.557 UT (limiting magnitude = 18.4). 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 17.8). the nearest star in M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) has position end figures 59s53, 16’58."3, distance 4."66, magnitudes V=22.2, B=22.9, R=21.5

2015 10 03.407

Mag.= 16.8, position end figures 59s.43, 02".4 observed by T. Noguchi, Chiba-ken, Japan using 0.23-m f/6.3 Schmidt Cassegrain + unfiltered CCD. An image posted at http://park8.wakwak.com/~ngc/images/PNVinM31_20151003.jpg.

2015 10 03.5629

Mag = 16.1, unfiltered CCD frames taken around 2015 Oct. 03.56286 UT, ( limiting magnitude = 19.4 ) using a 0.5-m f/6.8 RC(+FLI 1001E camera). PNV object brighten 1.5 mag/ 0.8 day. by K.Nishiyama

2015 10 03.501

2015 Oct. 03.501 UT, Photometry: B=16.9, V=16.3, R=16.1, position end figures 59s.41s, 02".2, using a 0.30-m f/9.9 Cassegrain + CCD(SBIG STL-1001E) + f/7.0 focal reducer at Osaki Lifelong Learning Center, JAPAN. Observer T. Yusa, Y. Suzuki, C. Shirotori and N. Endo, Osaki, Japan. BVR composite image was posted at http://space.geocities.jp/yusastar77/supernova/PNinM31_151003.htm