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Independent Discovery of a Probable Nova in M31

ATel #12100; K. Hornoch, P. Fatka, H. Kucakova (Astronomical Institute, Ondrejov, Czech Republic)
on 11 Oct 2018; 07:51 UT
Credential Certification: Matt Darnley (M.J.Darnley@ljmu.ac.uk)

Subjects: Optical, Nova, Transient

We report the independent discovery of a probable nova in M31 on a co-added 720-s R-band CCD frame taken on 2018 Oct. 11.162 UT with the 0.65-m telescope at Ondrejov.

The object was independently discovered also by Q. Yin and X. Gao (designated as AT2018hfs; see here). The object was designated by us as PNV J00424990+4123348 and is located at R.A. = 0h42m49s.90, Decl. = +41o23'34".8 (equinox 2000.0), which is 62.8" east and 446.3" 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:

2018 Oct. 9.738 UT, [20.5; 11.162, 17.9 ± 0.1.

Discovery image