Discovery of a Probable Nova in M31

ATel #10507; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), H. Kucakova (Astronomical Institute, Charles U., Prague, Czech Republic)
on 19 Jun 2017; 11:23 UT
Credential Certification: Steven Williams (scw@astro.ljmu.ac.uk)

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We report the discovery of a probable nova in M31 on a co-added 1350-s R-band CCD frame taken on 2017 Jun. 19.052 UT with the 0.65-m telescope at Ondrejov.

The object designated PNV J00424379+4113295 is located at R.A. = 0h42m43s.79, Decl. = +41o13'29".5 (equinox 2000.0), which is 6.0" west and 159.0" 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 Jun. 14.043 UT, [19.6; 19.052, 17.7 ± 0.1.

We thank M. Wolf for getting images on Jun. 14.043 UT.

Discovery image