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Discovery of a Probable Nova in M31

ATel #10166; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), H. Kucakova, J. Vrastil (Astronomical Institute, Charles U., Prague, Czech Republic)
on 11 Mar 2017; 17:26 UT
Credential Certification: Steven Williams (scw@astro.ljmu.ac.uk)

Subjects: Optical, Nova, Transient

We report the discovery of a probable nova in M31 on a co-added 1710-s R-band CCD frame taken on 2017 Mar. 10.796 UT with the 0.65-m telescope at Ondrejov. The new object is visible also on a few prediscovery frames taken with the same instrumentation.

The object designated PNV J00424502+4116395 is located at R.A. = 0h42m45s.02, Decl. = +41o16'39".5 (equinox 2000.0), which is 7.8" east and 31.0" 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 Mar. 2.747, [18.6; 5.776, 18.2 ± 0.5; 5.789, 18.1 ± 0.5; 10.796, 17.3 ± 0.3; 10.820, 17.2 ± 0.3.

Discovery image