2012CBET.3092....3A

K. Ayani, Bisei Astronomical Observatory (BAO), Okayama, Japan; and H. Yamaoka, Kyushu University, report that low-resolution spectroscopy (range 400-800 nm; resolution 0.5 nm) of PSN J19213020+6108101 = SN 2012bv was carried out on Apr. 11.8 UT with the 1-m BAO telescope; despite the poor-S/N ratio of the spectrum, preliminary inspection reveals P-Cyg profiles of H-alpha and H-beta, whose absorption bottoms are blueshifted by 9000 and 9200 km/s respectively, assuming a heliocentric velocity for NGC 6796 of 2189 km/s (Theureau et al. 1998, A.Ap. Suppl. 130, 333). On Apr. 23.7, Ayani and S. Maeno obtained spectroscopy with the same instrumentation, revealing a prominent, broad (FWHM about 9000 km/s) H-alpha emission line. The absorption bottom of the P-Cyg profile of H-beta is blueshifted by 7500 km/s with respect to the systemic velocity of NGC 6796. Absorption of Fe II 516.9-nm can be seen. These feature confirm that 2012bv is a type-II supernova. The spectrum is posted at http://www.bao.go.jp/astro/2012/sn/PSN_J19213020+6108101_Apr23.png.