Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PNV J00423733+4120519

PNV J00423733+4120519   2020 10 22.5502*  00 42 37.33 +41 20 51.9  16.9 G   79W 283N  M31       R 9

2020 10 5502

Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 16.9) on several 300-s survey image (limiting mag about 19.5) taken by Xing Gao at Xingming Observatory #3 (N88) around Oct. 22.55024 UTC using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m37.33s +41d20’51”.9 (equinox 2000.0). Which is about 78.8" west and 283.4" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Oct. 21.55558 (limiting mag 20.5) . Images can be found at: http://xjltp.china-vo.org/xm41mz.html

2020 10 21.9167

We report the independent discovery of this possible nova in M31 on a 180-s R-band CCD frame taken on 2020 Oct. 21.92 UT with the 0.5 m f/8 Ritchey Chretien + CCD FLI PL4240 at MPC Code L07 (Osservatorio Salvatore di Giacomo, Agerola, ITALY) at coordinates: R.A. = 0:42:37.3226, Decl.= +41:20:52.867 (equinox 2000.0). Our discovery image of this transient is visible here: https://tinyurl.com/y443badr - Nothing is visible at this position on our archival images taken on 2020, October 20.83 (limiting B-mag 21). The following filtered magnitudes were obtained using the 0.5-m telescope at L07: B mag : 17.28 ± 0.05 (2459144.531273148) / V mag : 17.54 ± 0.05 (2459144.5379976854) / R mag : 17.7 ± 0.05 (2459144.5447106482). Observers: A. Catapano, L. Izzo, E. Guido, A. Noschese, F. Coccia, L. D'Avino