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
https://urn.fi/URN:NBN:fi-fe2021042718517
Tiivistelmä
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.
Kokoelmat
- Rinnakkaistallenteet [29337]