The Early Detection and Follow-up of the Highly Obscured Type II Supernova 2016ija/DLT16am

L. Tartaglia, D. J. Sand, S. Valenti, S. Wyatt, I. Arcavi, C. Ashall, M. T. Botticella, R. Cartier, T. W. Chen, A. Cikota, M. Della Valle, R. J. Foley, A. Gal-Yam, L. Galbany, C. Gall, J. B. Haislip, J. Harmanen, G. Hosseinzadeh, D. A. Howell, E. Y. HsiaoC. Inserra, S. W. Jha, E. Kankare, C. D. Kilpatrick, V. V. Kouprianov, H. Kuncarayakti, T. J. Maccarone, S. Mattila, P. A. Mazzali, C. McCully, A. Melandri, N. Morrell, G. Pignata, A. L. Piro, D. E. Reichart, C. Rojas-Bravo, S. J. Smartt, K. W. Smith, J. Sollerman, M. D. Stritzinger, M. Sullivan, F. Taddia, D. R. Young

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We present our analysis of the Type II supernova DLT16am (SN 2016ija). The object was discovered during theongoing D < 40 Mpc (DLT40) one-day cadence supernova search at r ∼ 20.1 mag in the edge-on nearby(D = 20.0 ± 4.0 Mpc) galaxy NGC 1532. The subsequent prompt and high-cadenced spectroscopic andphotometric follow-up revealed a highly extinguished transient, with E(B - V) = 1.95 ±0.15 mag, consistentwith a standard extinction law with RV=3.1 and a bright (MV = -18.48 ±0.77 mag) absolute peak magnitude. Acomparison of the photometric features with those of large samples of SNe II reveals a fast rise for the derivedluminosity and a relatively short plateau phase, with a slope of S50V = 0.84 ±0.04 mag 50 days, consistent withthe photometric properties typical of those of fast-declining SNe II. Despite the large uncertainties on the distance andthe extinction in the direction of DLT16am, the measured photospheric expansion velocity and the derived absoluteV-band magnitude at ~50 days after the explosion match the existing luminosity-velocity relation for SNe II.

Original languageEnglish
Article number62
JournalAstrophysical Journal
Volume853
Issue number1
DOIs
Publication statusPublished - 20 Jan 2018

Keywords

  • galaxies: individual (NGC 1532)
  • supernovae: general
  • supernovae: individual (SN 2016ija, DLT16am)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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