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Optical spectra of Nova 2008-06b

ATEL # 1612; P. Reig (U. Crete/FORTH), N. Primak (FORTH), S. Akras (NOA), D. Hatzidimitriou (U. Crete/FORTH), W. Pietsch (MPE) and G. Papamastorakis (U. Crete/FORTH)
on 10 Jul 2008; 8:28 UT
Password Certification: Pablo Reig (pablo.reig@uv.es)

Subjects: Optical, Nova

We carried out spectroscopic observations of the optical transient near M31 reported in ATel #1591 (RA = 0h42m27s.81 DEC =+41o14'48".2 (J2000)) from the 1.3m telescope of the Skinakas Observatory in Crete (Greece) on the nights 27 June 2008 and 2 July 2008. The spectra covered the range 5080-7160 angstroms. The Halpha appeared strongly in emission and displayed a double peaked profile. The ratio of the blue peak to the red peak (B/R) reversed from B > R (i.e blue-dominated profile) on 27 June to B < R (i.e red-dominated profile) on 2 July. The equivalent width and the expansion velocity estimated from the FWHM of the Halpha line were EW(Ha)=-1400+-200 angstrom, FWHM=3050+-50 km/s and EW(Ha)=4500+-900 angstrom, FWHM=2570+-50 km/s, respectively. The broad Halpha line, the presence of the He I 5876 / Na I D blend and weak NII 5679 and the absence of significant Fe II emission lines suggest a He/N class of novae.


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