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Spectroscopy and photometry of nova M31N 2013-09d

ATel #5461; A. F. Valeev, E. A. Barsukova, S. Fabrika, O. Sholukhova (Special Astrophysical Observatory, Russia), K. Hornoch, P. Kusnirak (Astronomical Institute, Ondrejov, Czech Republic), J. Vrastil, H. Kucakova (Astronomical Institute, Charles U., Prague, Czech Republic), M. Henze (ESA/ESAC, Spain), A. W. Shafter (SDSU)
on 11 Oct 2013; 12:39 UT
Credential Certification: Barsukova E.A. (bars@sao.ru)

Subjects: Optical, Binary, Nova, Variables

We report optical spectroscopy and photometry of the recent M31 nova candidate M31N 2013-09d = TCP J00415307+4109540 (see ATel #5414). The spectrum was taken on 2013 Oct. 4.822 UT using the Russian BTA telescope equipped with the SCORPIO spectral camera. The spectral range was 3800-7000 A with a spectral resolution of 13 A. The spectrum shows a blue continuum with a very strong H-alpha emission line having an equivalent width of 330 ±10 A. The line width is characterized by a FWHM = 1050 ±20 km/s taking into account the spectral resolution. The H-beta line has an equivalent width of 60 ±20 A and a FWHM = 1020 ±20 km/s. In addition to Balmer emissions, many Fe II lines are seen. All of these features in the spectrum are consistent with a Fe II class nova.

Following R-band photometry was obtained with the 0.65-m telescope at Ondrejov:

2013 Sep. 24.910 UT, 17.92 ± 0.09; 25.953, 17.55 ± 0.09; 26.756, 17.06 ± 0.07; 27.754, 17.95 ± 0.09; 28.759, 18.8 ± 0.15; 30.756, 18.6 ± 0.1; Oct. 1.752, 18.5 ± 0.1; 2.742, 18.3 ± 0.1; 4.756, 18.8 ± 0.15; 5.017, 18.7 ± 0.1; 6.740, 18.5 ± 0.1; 7.021, 18.45 ± 0.08; 6.949, 18.43 ± 0.07; 7.738, 18.5 ± 0.1.

Spectrum of the nova