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Discovery of an Apparent Nova in M31

ATel #9388; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), H. Kucakova (Astronomical Institute, Charles U., Prague, Czech Republic)
on 19 Aug 2016; 15:06 UT
Credential Certification: Martin Henze (henze@ice.cat)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 9408, 9411

We report the discovery of an apparent nova in M31 on a co-added 1440-s R-band CCD frame taken on 2016 Aug. 18.999 UT with the 0.65-m telescope at Ondrejov. The new object is also visible on a prediscovery image taken on Aug. 17.102 UT with the same instrumentation under poor seeing.

The object designated PNV J00422352+4117197 is located at R.A. = 0h42m23s.52, Decl. = +41o17'19".7 (equinox 2000.0), which is 234.5" west and 71.2" 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:

2016 Aug. 14.993 UT, [20.2; 17.102, 18.9 ± 0.3; 18.999, 17.5 ± 0.1; 19.017, 17.3 ± 0.1.

We thank P. Kusnirak for getting images on Aug. 14.993 UT.

Discovery image