SIMBAD references

J. M. Silverman, T. N. Steele, A. V. Filippenko, R. J. Foley, and D. Poznanski, University of California, Berkeley, report that inspection of CCD spectra (range 320-920 nm), obtained on Apr. 28 UT with the Keck I 10-m telescope (+ LRIS), shows that SN 2008bv (CBET 1345) is a type-Ia supernova near maximum brightness, significantly reddened. Removing the host-galaxy recession velocity of 16400 km/s (from narrow emission lines), the minimum of the Si II 635.5-nm absorption feature is found to be blueshifted by about 13400 km/s. SN 2008bw (CBET 1346) is also a type-Ia supernova, probably 2-3 weeks past maximum brightness. Removing the host-galaxy recession velocity of 9931 km/s (Falco et al. 1999, PASP 111, 438), the minimum of the Si II 635.5-nm absorption feature is found to be blueshifted by about 11200 km/s. SN 2008ca (CBET 1355) is a type-Ia supernova at redshift 0.1315 (from narrow lines). Using a principal-component analysis (Foley et al. 2007, ArXiV:0710.2338), a significant amount of galaxy contamination is removed; the SNID routine (Blondin and Tonry, 2007, Ap.J. 666, 1024) then shows the remaining spectrum to be similar to that of type-Ia supernovae about one month past maximum light. Likewise, SN 2008cb (CBET 1355) is a type-Ia supernova about 1 month past maximum. Using the "superfit" fitting routine (Howell et al. 2005, Ap.J. 634, 1190), the spectrum resembles that of SN 1994D at 20 days past maximum brightness with a significant amount of galaxy contamination.