Spectroscopy and photometry of the nova candidate M33N 2013-12a
ATel #5746; S. Fabrika, E. A. Barsukova, A. F. Valeev, O. Sholukhova (Special Astrophysical Observatory, Nizhnij Arkhyz), K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), A. W. Shafter (SDSU), M. Henze (ESA/ESAC, Spain)
on 9 Jan 2014; 13:26 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Sergei Fabrika (fabrika@sao.ru)
Subjects: Optical, Nova, Transient, Variables
We report optical spectroscopy and photometry of a recent M33 nova candidate (M33N 2013-12a = PNV J01331092+3037511) detected by the Lick Observatory Supernova Search ( http://www.cbat.eps.harvard.edu/unconf/followups/J01331092+3037511.html ). The spectroscopy and photometry were obtained on 2014 Jan. 2.68 UT using the Russian BTA telescope equipped with the SCORPIO spectrograph. Spectra were taken with a spectral resolution of 5 Å in a spectral range of 5750 - 7500 Å. The Hα line found in this range is very strong. Its profile is double peaked with a radial velocity shift of 400 km/s between both peaks. The line width corrected for spectral resolution is 1200 km/s at half intensity and 1940 km/s at zero intensity. Its equivalent width is 422 Å. Although the spectrum is relatively noisy (see the original and smoothed spectra attached) we detected the Na I (D) emission doublet with about 4.5 sigma significance. The equivalent width of the Na I emission is 7 ± 2 Å. Photometry of M33N 2013-12a obtained prior to the spectroscopy gave V = 18.71 ± 0.03, Rc = 18.11 ± 0.02. Taking into account the Hα line width and the Na I lines we suggest the nova is likely of Fe II type.
Spectrum of the novae
