2006CBET..677....1M -
Central Bureau Electronic Telegrams, 677, 1 (2006/October-0)
Supernova 2006jc in UGC 4904 [slight revision to the text of cbet 676].
MODJAZ M., BLONDIN S., KIRSHNER R., CHALLIS P., MATHESON T. and MAMAJEK E.
Abstract (from CDS):
M. Modjaz, S. Blondin, R. Kirshner, and P. Challis, Harvard-Smithsonian Center for Astrophysics; and T. Matheson, National Optical Astronomy Observatory, report that a spectrogram (range 350-740 nm) of SN 2006jc, obtained by E. Mamajek on Oct. 17.50 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a peculiar supernova probably of type Ib/c with emission lines of He I, essentially agreeing with the assessments by Crotts et al. (CBET 672) and by Benetti et al. (CBET 674). The spectrum is similar to that of SN 1999cq (Matheson et al. 2000, A.J. 119, 2303); however, notable differences from SN 1999cq include a very blue continuum; additional emission lines consistent with He I 388.9-, 447.1-, and 501.5-nm (rest) that have widths of 1500-6500 km/s (FWHM); and the absence of the broad peak at around 540 nm. A plot showing the comparison between 2006jc and 1999cq can be viewed via the webpage
http://cfa-www.harvard.edu/oir/Research/supernova/spectra/sn06jc_comp.gif and the spectrum at .../spectra/sn2006jc-20061017.flm.gif
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