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Discovery of a Probable Nova in M31

ATel #10910; K. Hornoch, H. Kucakova (Astronomical Institute, Ondrejov, Czech Republic), J. Vrastil (Astronomical Institute, Charles U., Prague, Czech Republic)
on 30 Oct 2017; 21:41 UT
Credential Certification: Martin Henze (henze@ice.cat)

Subjects: Optical, Nova, Transient

We report the discovery of a probable nova in M31 on a co-added 1080-s R-band CCD frame taken on 2017 Oct. 30.760 UT with the 0.65-m telescope at Ondrejov.

The object designated PNV J00425023+4115271 is located at R.A. = 0h42m50s.23, Decl. = +41o15'27".1 (equinox 2000.0), which is 66.6" east and 41.4" south 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. 25.764 UT, [19.7; 30.760, 17.7 ± 0.2; 30.771, 17.6 ± 0.2.

Discovery image