Independent Discovery of a Probable Nova in M31
ATel #15011; K. Hornoch, H. Kucakova (Astronomical Institute, Ondrejov, Czech Republic)
on 2 Nov 2021; 16:31 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Allen W. Shafter (ashafter@sdsu.edu)
Subjects: Optical, Nova, Transient
We report the independent discovery of a probable nova in M31 on a co-added 990-s R-band CCD frame taken in poor seeing on 2021 Oct. 31.698 UT with the 0.65-m telescope at Ondrejov.
The object was independently discovered on Oct. 31.745 UT by M. Zhang and X. Gao and designated as PNV J00425423+4116505 = AT 2021acwv. The object was designated by us as M31N 2021-10c and is located at R.A. = 0h42m54s.27, Decl. = +41o16'50".6 (equinox 2000.0), which is 112.1" east and 42.1" north of the center of M31 (see link to discovery image below).
The following R-band magnitudes were obtained using the 0.65-m telescope at Ondrejov:
2021 Oct. 29.701 UT, [19.4; 30.701, [18.4; 31.698, 18.5 ± 0.2.
As with all extragalactic novae, follow-up spectroscopic and photometric observations to determine the nova's spectroscopic class and rate of decline (speed class) are encouraged.
Discovery image
