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Discovery of a Probable Nova in M31

ATel #10849; K. Hornoch, H. Kucakova (Astronomical Institute, Ondrejov, Czech Republic), M. Wolf (Astronomical Institute, Charles U., Prague, Czech Republic)
on 14 Oct 2017; 16:12 UT
Credential Certification: Allen W. Shafter (ashafter@mail.sdsu.edu)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 10887

We report the discovery of a probable nova in M31 on a co-added 1260-s R-band CCD frame taken on 2017 Oct. 14.039 UT with the 0.65-m telescope at Ondrejov.

The object designated PNV J00423905+4123006 is located at R.A. = 0h42m39s.05, Decl. = +41o23'00".6 (equinox 2000.0), which is 59.4" west and 412.1" 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:

2017 Oct. 12.811 UT, [20.0; 14.039, 18.8 ± 0.15.

Discovery image