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ATEL # 1900; A. W. Shafter (SDSU), R. Ciardullo (PSU), M. F. Bode, M. J. Darnley (Liverpool JMU, UK), K. A. Misselt (U. Arizona)
on 15 Jan 2009; 0:45 UT
Password Certification: Allen W. Shafter (firstname.lastname@example.org)
Subjects: Optical, Nova, Transients
We report spectroscopic observations of the recent M33 nova candidate, M33N 2009-01a, which was discovered on 2009 Jan. 07.54 by K. Nishiyama and F. Kabashima (CBET #1659). At our request, a spectrum (410–950 nm) of M33N 2009-01a was obtained approximately a week after discovery on 2009 Jan. 14.15 UT by J. Caldwell with the 9.2m Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph). The spectrum is dominated by Balmer, He II &lambda 4686Å, and He I (&lambda 5015Å, &lambda 5875Å, &lambda 6678Å, and &lambda 7065Å) emission features superimposed on a flat continuum. The profiles of the H&alpha and H&beta lines are complex, and appear to be composed of distinct broad (H&alpha: FWZI ~ 8500 km/s; FWHM ~ 6500 km/s) and narrow (H&alpha: FWHM ~ 2100 km/s) components. Given the presence of broad Balmer and Helium emission features together with the absence of significant Fe II emission, we classify this nova as a member of the He/N class defined by Williams (1992, AJ, 104, 725).