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Discovery of an Apparent Nova in M31

ATel #10585; K. Hornoch, P. Fatka (Astronomical Institute, Ondrejov, Czech Republic)
on 20 Jul 2017; 12:29 UT
Credential Certification: Steven Williams (scw@astro.ljmu.ac.uk)

Subjects: Optical, Nova, Transient

We report the discovery of an apparent nova in M31 on a co-added 630-s R-band CCD frame taken on 2017 Jul. 19.953 UT with the 0.65-m telescope at Ondrejov.

The object designated PNV J00424126+4116102 is located at R.A. = 0h42m41s.26, Decl. = +41o16'10".2 (equinox 2000.0), which is 34.5" west and 1.7" 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 Jul. 5.060 UT, [19.9; 7.917, [18.9; 19.953, 16.1 ± 0.15; 20.073, 16.2 ± 0.15.

We thank P. Kusnirak for getting images on Jul. 5.060 UT and H. Kucakova on Jul. 7.917 UT.

Discovery image