OPTICAL SPECTRA OF 73 STRIPPED-ENVELOPE CORE-COLLAPSE SUPERNOVAE

By Maryam Modjaz, S. Blondin, R. Kirshner, Thomas Matheson, P. Berlind, F. Bianco, M. Calkins, P. Challis, P. Garnavich, M. Hicken and 3 more. 2014

165 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/d3cfabaab4ef075a9540082fa515c0180a2ed507

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Citations in the corpus

Observational and Physical Classification of Supernovae (2016, unknown): “…SN Ic during the first peak and then evolved into a SN Ib during the second peak; however, clear detection of He I already in its earlier spectra (Folatelli et al. 2016; Modjaz et al. 2014) indicates it is really a SN Ib (albeit with unusually low He I expansion velocities of 7000 km s−1 or less).”
ASASSN-15oi: a rapidly evolving, luminous tidal disruption event at 216 Mpc (2016, background): “Figure 7 shows a comparison between spectra taken at or before maximum for ASASSN-15oi (Prentice et al. 2015), the He-rich TDE PTF09ge (Arcavi et al. 2014), the Type Ib supernova SN 2004gq (Modjaz et al. 2014), and the broad-line Type Ic supernova SN 2002ap (Gal-Yam, Ofek & Shemmer 2002).”
Bolometric light curves and explosion parameters of 38 stripped-envelope core-collapse supernovae (2014, methodology): “Practically, the measurements of vph consist of a simple Gaussian fitting procedure to the absorption features of a wavelengthand flux-calibrated spectrum of the SN taken on or near peak, obtained from WISeREP (Yaron & Gal-Yam 2012)3 and Modjaz et al. (2014), performed in the IRAF package SPLOT.”
An Open Catalog for Supernova Data (2016, background): “…spectra to published flux values, and/or photometry, as many spectra have been released without scaling to the photometry (Silverman et al. 2012a; Modjaz et al. 2014); providing internally consistent dates of maximum light so that spectra can be compared by an appropriate phase; and correcting…”
The Carnegie Supernova Project I: analysis of stripped-envelope supernova light curves (2017, background): “Drout et al. (2011) published the first multi-band (V and R bands) sample of SNe Ib/c, studying 25 SNe; more recently, Bianco et al. (2014), Modjaz et al. (2014), and Liu et al. (2016) have published optical and near-infrared light curves and visual- wavelength spectroscopy of > 60 SE SNe followed…”
Early-time light curves of Type Ib/c supernovae from the SDSS-II Supernova Survey (2014, background): “…of the progenitor star) revealed low mass 1 During the refereeing process, the light curves of 64 SE-SNe and optical spectra of 73 SE-SNe were released by Bianco et al. (2014) and Modjaz et al. (2014), respectively. progenitor stars for these transients, implying that they belong to binary systems.”