2006CBET..729....1P

M. M. Phillips, G. Folatelli, C. Contreras, and N. Morrell, on behalf of the Carnegie Supernova Project, report that a spectrum (range 380-990 nm) of 2006mr (cf. CBET 723), obtained on Nov. 9.15 UT with the LDSS-3 spectrograph attached to the Magellan Clay 6.5-m telescope at Las Campanas Observatory (LCO), reveals that this is a type-Ia supernova very similar in appearance to SN 1986G. Adopting a recession velocity of 1760 km/s for the host galaxy (cf. Longhetti et al. 1998, A.Ap. Suppl. 130, 267), an approximate expansion velocity of 11000 km/s was derived from the absorption minimum of the Si II 635.5-nm line. This is similar to the expansion velocity displayed by SN 1986G a few days before maximum. Strong Na I D interstellar absorption at the redshift of NGC 1316 was detected with an equivalent width of about 0.32 nm, suggesting that the supernova may be significantly reddened. Measurements of CCD images obtained with the LCO Swope 1-m telescope give the following approximate magnitudes, which confirm that the supernova is still on the rise: 2006 Nov. 7, B = 15.85 ± 0.05, V = 15.14 ± 0.06; Nov. 9, B = 15.42 ± 0.03, V = 14.67 ± 0.04.