We report our observations of HSC16aayt (SN 2016jiu), which was discovered by the Subaru/Hyper Suprime-Cam (HSC) transient survey conducted as part of Subaru Strategic Program (SSP). It shows very slow photometric evolution and its rise time is more than 100 days. The optical magnitude change in 400 days remains within 0.6 mag. Spectra of HSC16aayt show a strong narrow emission line and we classify it as a Type IIn supernova. The redshift of HSC16aayt is 0.6814 +/- 0.0002 from the spectra. Its host galaxy center is at 5 kpc from the supernova location and HSC16aayt might be another example of isolated Type IIn supernovae, although the possible existence of underlying star forming activity of the host galaxy at the supernova location is not excluded.
@article{arxiv.1907.01633,
title = {HSC16aayt: Slowly evolving interacting transient rising for more than 100 days},
author = {Takashi J. Moriya and Masaomi Tanaka and Tomoki Morokuma and Yen-Chen Pan and Robert M. Quimby and Ji-an Jiang and Kojiro Kawana and Keiichi Maeda and Ken'ichi Nomoto and Nao Suzuki and Ichiro Takahashi and Masayuki Tanaka and Nozomu Tominaga and Masaki Yamaguchi and Naoki Yasuda and Jeff Cooke and Chris Curtin and Lluis Galbany and Santiago Gonzalez-Gaitan and Chien-Hsiu Lee and Giuliano Pignata and Tyler Pritchard},
journal= {arXiv preprint arXiv:1907.01633},
year = {2019}
}
Comments
14 pages, 12 figures, 1 table, accepted by The Astrophysical Journal