PNV J00423334+4108503 = AT2022wve = XM84MZ is a Known LPV in M31
ATel #15711; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic)
on 22 Oct 2022; 18:19 UT
Credential Certification: Allen W. Shafter (ashafter@sdsu.edu)
Subjects: Optical, Nova, Transient
Information about the discovery of a faint (19.7 mag) possible nova in M31 by M. Zhang and X. Gao (Xingming Observatory) was recently posted
here.
The object was detected many times in the course of an M31 nova search and monitoring program at the Ondrejov observatory during last decade, and is a known long period variable (LPV) cataloged in the following two catalogs of M31 variables:
(1) In The POINT-AGAPE Survey - I. The variable stars in M31 by An et al. (2004, MNRAS, 351, 1071A) as object No. 82416 classified as LPV with period of light changes P = 200.4d. The variable object is located at R.A. = 0h42m33s.40, Decl. = +41o08'49".7 which is only 0.94" from the position of the PNV J00423334+4108503.
(2) In The Wendelstein Calar Alto Pixellensing Project (WeCAPP): the M31 variable star catalogue by Fliri et al. (2006, A&A, 445, 423F) as object No. 798 classified as LPV with period of light changes P = 202.9d. The variable object is located at R.A. = 0h42m33s.41, Decl. = +41o08'50".5, which is only 0.82" from the position of the PNV J00423334+4108503.
This object is another case of the known variable object masquerading as a possible extragalactic nova when observable only around its maximum brightness close to the survey limit, e.g., see ATel #4314, #4315, #4341, #6359, and #6388.
