TY - JOUR
T1 - The Hyper Suprime-Cam SSP transient survey in COSMOS
T2 - Overview
AU - Yasuda, Naoki
AU - Tanaka, Masaomi
AU - Tominaga, Nozomu
AU - Jiang, Ji An
AU - Moriya, Takashi J.
AU - Morokuma, Tomoki
AU - Suzuki, Nao
AU - Takahashi, Ichiro
AU - Yamaguchi, Masaki S.
AU - Maeda, Keiichi
AU - Sako, Masao
AU - Ikeda, Shiro
AU - Kimura, Akisato
AU - Morii, Mikio
AU - Ueda, Naonori
AU - Yoshida, Naoki
AU - Lee, Chien Hsiu
AU - Suyu, Sherry H.
AU - Komiyama, Yutaka
AU - Regnault, Nicolas
AU - Rubin, David
N1 - Publisher Copyright:
© 2019 The Author(s). Published by Oxford University Press on behalf of the Astronomical Society of Japan.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
KW - cosmology: observations
KW - supernovae: general
KW - surveys
UR - https://www.scopus.com/pages/publications/85070833053
U2 - 10.1093/pasj/psz050
DO - 10.1093/pasj/psz050
M3 - Article
AN - SCOPUS:85070833053
SN - 0004-6264
VL - 71
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 4
M1 - 74
ER -