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Optical Spectroscopy of Type Ia Supernovae

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arxiv 0803.1705 v1 pith:WSJ2EJMG submitted 2008-03-12 astro-ph

Optical Spectroscopy of Type Ia Supernovae

T. Matheson , R. P. Kirshner , P. Challis , S. Jha , P. M. Garnavich , P. Berlind , M. L. Calkins , S. Blondin
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Z. Balog A. E. Bragg N. Caldwell K. Dendy Concannon E. E. Falco G. J. M. Graves J. P. Huchra J. Kuraszkiewicz J. A. Mader A. Mahdavi M. Phelps K. Rines I. Song B. J. Wilkes
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We present 432 low-dispersion optical spectra of 32 Type Ia supernovae (SNe Ia) that also have well-calibrated light curves. The coverage ranges from 6 epochs to 36 epochs of spectroscopy. Most of the data were obtained with the 1.5m Tillinghast telescope at the F. L. Whipple Observatory with typical wavelength coverage of 3700-7400A and a resolution of ~7A. The earliest spectra are thirteen days before B-band maximum; two-thirds of the SNe were observed before maximum brightness. Coverage for some SNe continues almost to the nebular phase. The consistency of the method of observation and the technique of reduction makes this an ideal data set for studying the spectroscopic diversity of SNe Ia.

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