Spectroscopic confirmation and photometry of the recent M31 nova AT2019sxc (= PNV J00430155+4117599)
ATel #13230; S. Fabrika, O. Sholukhova, Yu. Solovyeva, D. Oparin, A. Sarkisyan, A. Vinokurov (SAO RAS), A. W. Shafter (SDSU)
on 27 Oct 2019; 21:29 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Sergei Fabrika (fabrika@sao.ru)
Referred to by ATel #: 13272
We report optical spectroscopic confirmation of the M31 nova AT2019sxc (= PNV J00430155+4117599) announced in ATel #13207.
The spectral data were obtained on 2019 Oct. 24.01. UT using the Russian BTA telescope equipped with the SCORPIO spectrograph. The spectrum was taken with a resolution of 5.3 Å in the 3750 - 5440 Å blue range and in the 5720 - 7400 Å red range. The widths were corrected for spectral resolution. The photometry of the nova was obtained just before the time of the BTA spectrum with the same device and gave B = 17.66 ± 0.08, V = 17.41 ± 0.09, Rc = 17.07 ± 0.05.
The nova shows Balmer emission lines together with many Fe II lines. In the main lines: H-alpha, H-beta, H-gamma we observed P Cyg profiles -1900 ± 100 km/s, FeII lines with P Cyg -1350 ± 70 km/s. The hydrogen lines have a width of FWHM = 1600 ± 100 km/s, while the FeII lines (4923, 5169 Å) are characterized by FWHM = 1450 ± 50 km/s. Other FeII lines are very broad and complicated. In the case of hydrogen lines, we found narrow peaks both in absorption and emission components. We have found CaII (3933, 3968 Å), NaI (5889, 5895 Å) and SiII (6347, 6371 Å) with very deep P Cyg absorption profiles -1950 ± 50 km/s along with emission components. We conclude that the M31 nova AT2019sxc belongs to the Fe II class.
