Year: 2019
Type: article
Abstract: We present an overview of a deep transient survey of the COSMOS field with the Subaru Hyper Suprime-Cam (HSC). The survey was performed for the 1.77 deg2 ultra-deep layer and 5.78 deg2 deep layer in the Subaru Strategic Program over six- and four-month periods from 2016 to 2017, respectively. The ultra-deep layer reaches a median depth per epoch of 26.4, 26.3, 26.0, 25.6, and 24.6 mag in g, r, i, z, and y bands, respectively; the deep layer is ∼0.6 mag shallower. In total, 1824 supernova candidates were identified. Based on light-curve fitting and derived light-curve shape parameter, we classified 433 objects as Type Ia supernovae (SNe); among these candidates, 129 objects have spectroscopic or COSMOS2015 photometric redshifts and 58 objects are located at z > 1. Our unique data set doubles the number of Type Ia SNe at z > 1 and enables various time-domain analyses of Type II SNe, high-redshift superluminous SNe, variable stars, and active galactic nuclei.
DOI: 10.1093/pasj/psz050
Authors: Naoki Yasuda, Masaomi Tanaka, Nozomu Tominaga, Ji-an Jiang, Takashi J Moriya, Tomoki Morokuma, Nao Suzuki, Ichiro Takahashi, Masaki S Yamaguchi, Keiichi Maeda, Masao Sako, Shiro Ikeda, Akisato Kimura, Mikio Morii, Naonori Ueda, Naoki Yoshida, Chien-Hsiu Lee, Sherry H Suyu, Yutaka Komiyama, Nicolas Regnault, David Rubin
Institutions: Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo Institutes for Advanced Study, Tohoku University, Konan University, Institute of Astronomy, Graduate School of Science, The University of Tokyo, The University of Tokyo, National Institutes of Natural Sciences, National Astronomical Observatory of Japan, Japan Science and Technology Agency, Kyoto University, University of Pennsylvania, The Institute of Statistical Mathematics, NTT (Japan), Max Planck Institute for Astrophysics, Technical University of Munich, The Graduate University for Advanced Studies, SOKENDAI, Centre National de la Recherche Scientifique, Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Énergies, Institut National de Physique Nucléaire et de Physique des Particules, Université Paris Diderot, Space Telescope Science Institute, Lawrence Berkeley National Laboratory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, National Aeronautics and Space Administration, Princeton University, Johns Hopkins University, Space Telescope Science Institute, Queen's University Belfast, Durham University, Ministry of Education, Culture, Sports, Science and Technology, Academia Sinica, Cabinet Office, Government of Japan, National Central University, National Astronomical Observatory of Japan, High Energy Accelerator Research Organization, Eötvös Loránd Tudományegyetem, Max-Planck-Institut für Astronomie, Toray Science Foundation, Smithsonian Astrophysical Observatory, Science Mission Directorate, Japan Society for the Promotion of Science, Japan Science and Technology Agency, Planetary Science Division, Core Research for Evolutional Science and Technology
Awards: データ科学の手法を用いた新規天体現象の発見, Gravitational waves and electromagnetic signals from the merger of neutron star binaries, G2826193575, G3728652323, Uncovering unknown mass-loss mechanisms of dying massive stars through supernovae, Exploring the Frontier of Time-Domain Astronomy with Large Survey Observations, G4474636675, G4564409070, G5237506172, G618131832, A NEO SEARCH PROGRAM USING THE PAN-STARRS PS1 TELESCOPETHE GOAL OF THE PROPOSED RESEARCH IS TO USE T, G7187964967, Pan-STARRS1: Operations; Public Data Release; Education and Outreach, G8157362042, G833430883, Establishing Next Generation UV-Opt-IR Standard Star Network with Hubble Space Telescope
OpenAlex ID: W2937430070