Spectroscopic classification of AT 2019lcg as a nova in M31

ATel #12953; S. C. Williams (Lancaster), M. J. Darnley (LJMU), M. W. Healy (LJMU), F. J. Murphy-Glaysher (LJMU), C. L. Ransome (LJMU)
on 23 Jul 2019; 17:19 UT
Credential Certification: Steven Williams (s.williams7@lancaster.ac.uk)

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We obtained a spectrum of the transient AT 2019lcg with the SPRAT spectrograph (resolution R ~ 350; Piascik et al. 2014) on the 2-m Liverpool Telescope (LT; Steele et al. 2004) on 2019 Jul 19.18 UT.

The spectrum shows strong, double-peaked Balmer emission (Hα, Hβ, Hγ) and we measure the FWHM of the Hα line to be ~ 3000 km/s. We also detect emission from O I (7773 Å) and evidence of emission from the Bowen blend (~4645 Å). This spectrum confirms that AT 2019lcg is a nova in M31 after peak brightness.