[vsnet-alert 11869] V407 Cyg outburst spectra

[Taichi Kato]

   Imamura-san, Fujii-san and Maehara-san have succeeded in obtaining
spectra.  The object is indeed undergoing a nova outburst!
The overall feature of the spectra suggests an Fe II-class classical
nova eruption (but in a symbiotic environment).  The evolution
appears to be slightly slower than in RS Oph.
(It might be worth making a comparison with V3890 Sgr, another
"symbiotic" recurrent nova).

Imamura-san's spectrum (Okayama U. of Sci.) :
http://blog-imgs-32-origin.fc2.com/t/n/b/tnblab/V407_Cyg20100313.png

   Balmer, He I 5878, 6678, 7065, O I 7774, Mg II 7890 and Fe II lines
are in emission.

Imamura-san also reported photometric observations:

13.859(UT) B = 9.55
13.855(UT) V = 8.76

Fujii-san's spectrum:
http://otobs.org/FBO/fko/nova/v407_cyg_20100313.gif

   FWHM of Halpha = 1600 km/s

Maehara-san's spectrum:
http://www.kwasan.kyoto-u.ac.jp/~maehara/novae/CYGV407-20100313.png