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Spectroscopic classification of M31N 2017-06c as a classical nova

ATel #10487; S. C. Williams (Lancaster), M. J. Darnley (LJMU)
on 13 Jun 2017; 08:59 UT
Credential Certification: Steven Williams (scw@astro.ljmu.ac.uk)

Subjects: Optical, Nova, Transient

We obtained a spectrum of classical nova candidate M31N 2017-06c (PNV J00423291+4112236) with the SPRAT spectrograph (resolution R ~ 350; Piascik et al. 2014) on the 2-m Liverpool Telescope (Steele et al. 2004) on 2017 June 13.17 UT.

The spectrum shows strong Balmer emission lines (Hα, Hβ, Hγ) and we measure the FWHM of Hα to be ~1100 km/s. We identify several Fe II emission lines, including the 42, 48, 49 and 74 multiplets. The spectrum also shows emission from Na I D and Si II 6347/6371 Å. The Na I D feature shows a strong P-Cygni absorption component, with absorption also seen to accompany the Si II and some of the Fe II lines. This spectrum confirms that M31N 2017-06c is a classical nova eruption in M31 and a member of the Fe II spectroscopic class.