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Discovery of a Probable Nova in M31

ATel #11856; K. Hornoch, P. Kusnirak (Astronomical Institute, Ondrejov, Czech Republic)
on 15 Jul 2018; 13:25 UT
Credential Certification: Matt Darnley (M.J.Darnley@ljmu.ac.uk)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 11866

We report the discovery of a probable nova in M31 on a co-added 900-s unfiltered CCD frame taken on 2018 Jul. 15.001 UT with the 0.65-m telescope at Ondrejov.

The object designated PNV J00425261+4118409 is located at R.A. = 0h42m52s.61, Decl. = +41o18'40".9 (equinox 2000.0), which is 93.4" east and 152.4" 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 Jul. 13.991 UT, [20.4; 15.001, 18.6 ± 0.15.

Discovery image