Hi All,
Confirmation that it is just an "ordinary" nova from the CBET circular:
Central Bureau for Astronomical Telegrams
> INTERNATIONAL ASTRONOMICAL UNION
> M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138,
> U.S.A.
>
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
>
CBAT@CFA.HARVARD.EDU (science)
> URL
http://www.cfa.harvard.edu/iau/cbat.html
>
>
> V2491 CYGNI
> K. Ayani, Bisei Astronomical Observatory (BAO); and K. Matsumoto,
> Osaka
> Kyoiku University, write that low-resolution spectra (range 400-800 nm;
> resolution 0.5 nm at H-alpha) of V2491 Cyg (cf. IAUC 8934), obtained with
> the
> BAO 1.01-m telescope on Apr. 11.72 UT, show prominent broad Balmer
> emission
> lines, which indicate that the object is a nova in its early phase of
> outburst. Fe II emission may be present. The H-alpha line has a FWHM of
> 4500 km/s and an equivalent width of about 36 nm.
>
>
> NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
> superseded by text appearing later in the printed IAU Circulars.
>
> (C) Copyright 2008 CBAT
> 2008 April 11 (CBET 1334) Daniel W. E.
> Green
Best,
Les D
Contributing Editor
A&T