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Discovery of a Possible Nova in M31

ATel #8218; S. C. Williams (LJMU), M. J. Darnley (LJMU)
on 27 Oct 2015; 14:36 UT
Credential Certification: Matt Darnley (M.J.Darnley@ljmu.ac.uk)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 8281

We report the discovery of a new transient in M31, probably the eruption of a previously unknown nova system, in data obtained with the IO:O CCD camera on the Liverpool Telescope (Steele et al. 2004) on 2015 October 26.91 UT.

We calculate the position of the transient to be RA = 00:43:15.343, Dec. = +41:20:16.61 (J2000) and measure it to have a V-band magnitude of 19.56 ± 0.06 and r' = 19.52 ± 0.04 on 2015 October 26.91.

The candidate may also be visible in V-band data taken 2015 October 25.96, but it is fainter than V = 20.2.

The nova candidate is not detected in V-band data taken 2015 October 13.98 down to a limiting magnitude of V = 21.