PI: Lluis Galbany, U. of Pittsburgh, firstname.lastname@example.org
Address: Department of Physics and Astronomy, 100 Allen Hall, Pittsburgh, PA, 15260 USA
CoI: Stephanie Bernard, Swinburne U.
CoI: Jeffrey Cooke, Swinburne U.
CoI: Chris Curtin, Swinburne U.
CoI: Santiago Gonzalez, University of Lisbon
CoI: Jian Jiang, University of Tokyo
CoI: Chien-Hsiu Lee, NAOJ
CoI: Keiichi Maeda, Kyoto University
CoI: Tomoki Morokuma, University of Tokyo
CoI: Ken Nomoto, University of Tokyo
CoI: Giuliano Pignata, Universidad Andres Bello
CoI: Robert Quimby, San Diego State U.
CoI: Nao Suzuki, University of Tokyo
CoI: Ichiro Takahashi, University of Tokyo
CoI: Masaomi Tanaka, NAOJ
CoI: Masayuki Tanaka, NAOJ
CoI: Nozomu Tominaga, Konan University
CoI: Masaki Yamaguchi, University of Tokyo
CoI: Naoki Yasuda, University of Tokyo
CoI: Naoki Yashida, University of Tokyo
Title: Spectroscopic confirmation of high-redshift superluminous supernovae
Abstract: A deep transient survey was performed in the COSMOS field from Nov 2016 to May 2017 as a part of Subaru Strategic Program with Hyper Suprime-Cam (HSC-SSP). This transient survey allowed us to discover 3 spectroscopically-confirmed superluminous supernovae (SLSNe) at z~2, including the highest-redshift record of z=2.399. Many more supernova (SN) candidates at z>2 selected based on their host galaxies photometric redshifts, with the highest-redshift candidate at z~4.2, were found but their spectra were not taken. The spectroscopic follow-up of the high-redshift SLSN candidates was critical to confirm their high-redshift nature. Although the deep transient survey at the COSMOS field in HSC-SSP has finished, we are awarded an extra time to perform a similar half-year deep transient survey at the same COSMOS field starting in Dec 2017 (PI: N. Suzuki, S17B-055I). This extra survey at the same field not only allows us to discover more SLSNe at z>2 but also look for slowly-evolving high redshift SLSNe that continue to exist from the transient survey conducted one year before. Here, we propose Gemini-N GMOS spectroscopic follow-up to confirm the redshifts and SN types of 3 high-redshift SLSN candidates.
Program Type: Standard/Extragalactic
Run 1 (2018A): GEM-NQ/GMOSN -- 9.9hrs band 2 (GN-2018A-Q-230 )
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360