2006CBET..475....1K

K. Kinugasa, Gunma Astronomical Observatory (GAO); and H. Yamaoka, Kyushu University, write that a low-resolution spectrum (range 420-800 nm, resolution about 500) of SN 2006bk (CBET 462, IAUC 8698) was obtained under poor conditions on Apr. 5.6 UT with the GAO 1.5-m telescope. The spectrum shows a smooth continuum with a broad absorption feature around 520 nm (width about 50 nm) and 680 nm (width about 30 nm). If the recession velocity of the host galaxy (14850 km/s, Huchra et al. 1995, Ap.J. Suppl. 99, 391) is due to the Hubble expansion, the absolute magnitude at discovery is about -19.6 (assuming H_0 = 73 km/s/Mpc), which is somewhat luminous for a typical gravitational-collapsed event. Another spectrogram obtained on Apr. 9.6 shows a blue continuum with a prominent Fe II absorption feature around 520 nm (observed wavelength; width about 40 nm, 'W'-shaped). No other remarkable feature exists, which suggests that it is a type-Ic supernova near maximum light. Compared with the previous spectrum, no remarkable spectral evolution is detected.