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Discovery of a Probable Nova in M31

ATel #4205; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic)
on 23 Jun 2012; 16:23 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 4216

I report the discovery of a probable nova in M31 on a co-added 2790-s R-band CCD frame taken on June 23.035 UT with the 0.65-m telescope at Ondrejov.

The new object designated PNV J00423707+4122160 is located at R.A. = 0h42m37s.07, Decl. = +41o22'16".0 (equinox 2000.0), which is 81.7" west and 367.5" north of the center of M31 (see link to the discovery image below).

The following R-band magnitudes were obtained using the 0.65-m telescope at Ondrejov:

2012 June 20.038 UT, [20.2; 23.035, 18.6 +/- 0.1.

Discovery image