Superluminous supernovae from the Dark Energy Survey
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Superluminous supernovae from the Dark Energy Survey

  • Author(s): Angus, CR
  • Smith, M
  • Sullivan, M
  • Inserra, C
  • Wiseman, P
  • D'Andrea, CB
  • Thomas, BP
  • Nichol, RC
  • Galbany, L
  • Childress, M
  • Asorey, J
  • Brown, PJ
  • Casas, R
  • Castander, FJ
  • Curtin, C
  • Frohmaier, C
  • Glazebrook, K
  • Gruen, D
  • Gutierrez, C
  • Kessler, R
  • Kim, AG
  • Lidman, C
  • Macaulay, E
  • Nugent, P
  • Pursiainen, M
  • Sako, M
  • Soares-Santos, M
  • Thomas, RC
  • Abbott, TMC
  • Avila, S
  • Bertin, E
  • Brooks, D
  • Buckley-Geer, E
  • Burke, DL
  • Carnero Rosell, A
  • Carretero, J
  • da Costa, LN
  • De Vicente, J
  • Desai, S
  • Diehl, HT
  • Doel, P
  • Eifler, TF
  • Flaugher, B
  • Fosalba, P
  • Frieman, J
  • Garcia-Bellido, J
  • Gruendl, RA
  • Gschwend, J
  • Hartley, WG
  • Hollowood, DL
  • Honscheid, K
  • Hoyle, B
  • James, DJ
  • Kuehn, K
  • Kuropatkin, N
  • Lahav, O
  • Lima, M
  • Maia, MAG
  • March, M
  • Marshall, JL
  • Menanteau, F
  • Miller, CJ
  • Miquel, R
  • Ogando, RLC
  • Plazas, AA
  • Romer, AK
  • Sanchez, E
  • Schindler, R
  • Schubnell, M
  • Sobreira, F
  • Suchyta, E
  • Swanson, MEC
  • Tarle, G
  • Thomas, D
  • Tucker, DL
  • Collaboration, DES
  • et al.

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ABSTRACT We present a sample of 21 hydrogen-free superluminous supernovae (SLSNe-I) and one hydrogen-rich SLSN (SLSN-II) detected during the five-year Dark Energy Survey (DES). These SNe, located in the redshift range 0.220 < z < 1.998, represent the largest homogeneously selected sample of SLSN events at high redshift. We present the observed g, r, i, z light curves for these SNe, which we interpolate using Gaussian processes. The resulting light curves are analysed to determine the luminosity function of SLSNe-I, and their evolutionary time-scales. The DES SLSN-I sample significantly broadens the distribution of SLSN-I light-curve properties when combined with existing samples from the literature. We fit a magnetar model to our SLSNe, and find that this model alone is unable to replicate the behaviour of many of the bolometric light curves. We search the DES SLSN-I light curves for the presence of initial peaks prior to the main light-curve peak. Using a shock breakout model, our Monte Carlo search finds that 3 of our 14 events with pre-max data display such initial peaks. However, 10 events show no evidence for such peaks, in some cases down to an absolute magnitude of <−16, suggesting that such features are not ubiquitous to all SLSN-I events. We also identify a red pre-peak feature within the light curve of one SLSN, which is comparable to that observed within SN2018bsz.

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