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Discovery of an Apparent Nova in M31

ATel #3987; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), J. Vrastil (Astronomical Institute, Charles U., Prague, Czech Republic)
on 21 Mar 2012; 00:52 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 4181

We report the discovery of apparent nova in M31 on a co-added 1170-s R-band CCD frame taken on Mar. 17.768 UT with the 0.65-m telescope at Ondrejov.

The new object is located at R.A. = 0h42m22s.92, Decl. = +41o04'16".5 (equinox 2000.0), which is 241.7" west and 712.0" south of the center of M31.

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

2012 Mar. 4.800 UT, [20.0 (Hornoch); 17.768, 16.80 +/- 0.06 (Hornoch and Vrastil); 18.773, 16.89 +/- 0.10 (Hornoch and Vrastil); 19.768, 16.56 +/- 0.07 (P. Zasche).

In addition, we report the confirmation of the possible nova PNV J00422773+4108136 (ATEL #3976) on images from three nights as well as the following R-band magnitudes obtained with the same instrumentation as above:

2012 Mar. 17.768 UT, 18.2 +/- 0.1; 18.773, 17.4 +/- 0.15; 19.768, 17.8 +/- 0.1.

A discovery image