The Early Detection and Follow-up of the Highly Obscured Type II Supernova 2016ija/DLT16am
: L. Tartaglia, D. J. Sand, S. Valenti, S. Wyatt, J. P. Anderson, I. Arcavi, C. Ashall, M. T. Botticella, R. Cartier, T.-W. Chen, A. Cikota, D. Coulter, 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. Hsiao, C. Inserra, S. W. Jha, E. Kankare, C. D. Kilpatrick, V. V. Kouprianov, H. Kuncarayakti, T. J. Maccarone, K. Maguire, S. Mattila, P. A. Mazzali, C. McCully, A. Melandri, N. Morrell, M. M. Phillips, G. Pignata, A. L. Piro, S. Prentice, D. E. Reichart, C. Rojas-Bravo, S. J. Smartt, K. W. Smith, J. Sollerman, M. D. Stritzinger, M. Sullivan, F. Taddia, D. R. Young
Publisher: IOP
: 2018
: Astrophysical Journal
: ApJ
: 62
: 853
: 1
: 16
: 0004-637X
: 1538-4357
DOI: https://doi.org/10.3847/1538-4357/aaa014
: https://research.utu.fi/converis/portal/detail/Publication/29184793
We present our analysis of the Type II supernova DLT16am (SN 2016ija).
The object was discovered during the ongoing 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 and photometric
follow-up revealed a highly extinguished transient, with E(B-V)=1.95+/-
0.15 {mag}, consistent with a standard extinction law with R V
= 3.1 and a bright ({M}V=-18.48+/- 0.77 {mag})
absolute peak magnitude. A comparison of the photometric features with
those of large samples of SNe II reveals a fast rise for the derived
luminosity and a relatively short plateau phase, with a slope of
{S}50V=0.84+/- 0.04 {mag}/50 {days}, consistent with the
photometric properties typical of those of fast-declining SNe II.
Despite the large uncertainties on the distance and the extinction in
the direction of DLT16am, the measured photospheric expansion velocity
and the derived absolute V-band magnitude at ∼ 50 {days} after the
explosion match the existing luminosity–velocity relation for SNe
II.
