Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J00414435+4108287

TCP J00414435+4108287   2017 11 12.4653*  00 41 44.35 +41 08 28.7  17.4 U  676W 460S  M31       N 0

2017 11 12.4653

Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report the discovery of a possible nova (mag.= 17.4) in M31 on seven 60-s unfiltered CCD frames taken around 2017 Nov. 12.46534 UT, ( limiting magnitude = 19.9 ) using a 0.50-m f/6.8 reflector (+FLI 1001E camera). as follows We report that this star locates 676" west and 460" south from the center of galaxy. Nothing is visible at this location on our past frames taken on 2017 Nov. 09.473 UT ( limiting magnitude = 19.5 ), but Nov. 11.514 UT pre discovery 19.6 mag(limiting magnitude = 19.8 ). We have checked in Minor Planets. Nothing is visible at the position of possible nova on the Digitized Sky Survey (POSS2/UKSTU) from 1989 Oct. 01 (limiting red mag 19.3) and 1993 Sep. 23 (limiting infrared mag 18.9). the nearest star in M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) has position end figures 43s97, 32"8, distance 6"0, magnitudes V=22.4, B=22.5, R=22.0,

2017 11 14.911165

Observation of this transient object was made on 2017 11 14.911165 by G. Locatelli at Maritime Alps Observatory (MPC K32) Cuneo, Italy, with a Schmidt-Cassegrain telescope 0.25 m. f/6.3 + Sloan filters. Performed photometry returns these values: Sloan g - 17.682 ± 0.017; Sloan r - 17.032 ± 0.014; Sloan i - 16.181 (reference star UCAC4 656-002601). Link to image: https://www.flickr.com/photos/130703848@N04/?

2017 11 16.410

F. Watanabe observed this object using a 0.4-m Meili telescope (Meade Schmidt-Cassegrain telescope) + unfiltered CCD (SBIG STL-1001E) at Nayoro Observatory, Nayoro, Japan on Nov. 16.410 UT. The magnitude is measured to be U = 18.2 +/- 0.1 (reference stars from UCAC4 Vmag) and the position end figures are given as 44s.37, 28”.7.