2010CBET.2112....1F

R. J. Foley, Harvard-Smithsonian Center for Astrophysics, on behalf of the CfA Supernova Program, reports that inspection of CCD spectra (range 350-740 nm), obtained by G. Esquerdo on Jan. 7 UT with the Whipple Observatory 1.5-m telescope (+ FAST), shows that 2009nr (cf. CBET 2111) and 2010A (cf. CBET 2109) are both type-Ia supernovae. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that both may be similar to the luminous supernovae 1991T and 1999aa (e.g., Filippenko et al. 1992, Ap.J. 384, L15; Garavini et al. 2004, A.J. 128, 387). SN 2009nr is most similar to SN 1991T at 12 days past maximum brightness. SN 2010A is similar to SN 1999aa at one day before maximum brightness, but is also similar to the "normal" type-Ia supernova 1999ee at 9 days before maximum brightness. Removing the host-galaxy recession velocity of 6180 km/s (found from narrow emission lines), the minimum of the Si II 635.5-nm absorption feature is blueshifted by 12700 km/s.