Optical spectra of 73 stripped-envelope core-collapse supernovae

M. Modjaz, S. Blondin, R. P. Kirshner, T. Matheson, P. Berlind, F. B. Bianco, M. L. Calkins, P. Challis, P. Garnavich, M. Hicken, S. Jha, Y. Q. Liu, G. H. Marion

    Research output: Contribution to journalArticle

    Abstract

    We present 645 optical spectra of 73 supernovae (SNe) of Types IIb, Ib, Ic, and broad-lined Ic. All of these types are attributed to the core collapse of massive stars, with varying degrees of intact H and He envelopes before explosion. The SNe in our sample have a mean redshift 〈cz〉 = 4200 km s-1. Most of these spectra were gathered at the Harvard-Smithsonian Center for Astrophysics (CfA) between 2004 and 2009. For 53 SNe, these are the first published spectra. The data coverage ranges from mere identification (1-3 spectra) for a few SNe to extensive series of observations (10-30 spectra) that trace the spectral evolution for others, with an average of 9 spectra per SN. For 44 SNe of the 73 SNe presented here, we have well-determined dates of maximum light to determine the phase of each spectrum. Our sample constitutes the most extensive spectral library of stripped-envelope SNe to date. We provide very early coverage (as early as 30 days before V-band max) for photospheric spectra, as well as late-time nebular coverage when the innermost regions of the SN are visible (as late as 2 yr after explosion, while for SN 1993J, we have data as late as 11.6 yr). This data set has homogeneous observations and reductions that allow us to study the spectroscopic diversity of these classes of stripped SNe and to compare these to SNe-gamma-ray bursts. We undertake these matters in follow-up papers.

    Original languageEnglish (US)
    Article number99
    JournalAstronomical Journal
    Volume147
    Issue number5
    DOIs
    StatePublished - May 2014

    Keywords

    • supernovae: general
    • surveys

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

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    Modjaz, M., Blondin, S., Kirshner, R. P., Matheson, T., Berlind, P., Bianco, F. B., Calkins, M. L., Challis, P., Garnavich, P., Hicken, M., Jha, S., Liu, Y. Q., & Marion, G. H. (2014). Optical spectra of 73 stripped-envelope core-collapse supernovae. Astronomical Journal, 147(5), [99]. https://doi.org/10.1088/0004-6256/147/5/99