Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J00430419+4115155

PNV J00430419+4115155   2017 11 16.5097*  00 43 04.19 +41 15 15.5  16.9 U  224E  53S  M31       N 0

2017 11 16.5097

Koichi Nishiyama and Fujio Kabashima in Japan report the discovery of a possible nova (mag.= 16.9) in M31 on seven 60-s unfiltered CCD frames taken around 2017 Nov. 16.50965 UT( limiting magnitude = 19.7 ), using a 0.50-m f/6.8 reflector (+FLI 1001E camera). as follows We report that this star locates 224" east and 53" south from the center of galaxy. Nothing is visible at this location on our past frames taken on 2017 Nov. 15.478 UT ( limiting magnitude = 19.2 ). 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 04s39, 15"3, distance 2"3, magnitudes V=22.1, B=23.4, R=21.2,

2017 11 17.322

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. 17.322 UT. The magnitude is measured to be U = 16.9 +/- 0.2 (reference stars from UCAC4 Vmag) and the position end figures are given as 04s.20, 15”.4.

2017 11 16.93028

Observation of this transient object was made on 2017 11 16.93028 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 - 16.931 ± 0.021; Sloan r - 16.661 ± 0.026; Sloan i - 16.917 ± 0.032. Reference star - UCAC4 657-002786 Link to image: https://www.flickr.com/photos/130703848@N04/26711664289/in/dateposted-public/