The Hyper Suprime-Cam SSP transient survey in COSMOS: Overview
The Hyper Suprime-Cam SSP transient survey in COSMOS: Overview
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DOI：
10.1093/pasj/psz050
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发表时间：
2019-04
影响因子：
2.3
通讯作者：
N. Yasuda;Masaomi Tanaka;N. Tominaga;Jiachen Jiang;T. Moriya;T. Morokuma;N. Suzuki;I. Takahashi;M. Yamaguchi;K. Maeda;M. Sako;Shiro Ikeda;Akisato Kimura;M. Morii;N. Ueda;N. Yoshida;Chien-Hsiu Lee;S. Suyu;Y. Komiyama;N. Regnault;D. Rubin
中科院分区：
文献类型：
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作者：
N. Yasuda;Masaomi Tanaka;N. Tominaga;Jiachen Jiang;T. Moriya;T. Morokuma;N. Suzuki;I. Takahashi;M. Yamaguchi;K. Maeda;M. Sako;Shiro Ikeda;Akisato Kimura;M. Morii;N. Ueda;N. Yoshida;Chien-Hsiu Lee;S. Suyu;Y. Komiyama;N. Regnault;D. Rubin
我们提出了一个深刻的瞬态调查的COSMOS领域与斯巴鲁超级超级凸轮（HSC）的概述。该调查分别在2016年至2017年的六个月和四个月期间对斯巴鲁战略计划中的1.77 deg 2超深层和5.78 deg 2深层进行。超深层在g、r、i、z和y波段的平均深度分别为26.4、26.3、26.0、25.6和24.6等;深层较浅，平均深度为0.6等。总共有1824颗超新星候选者被确认。基于光变曲线拟合和导出的光变曲线形状参数，我们将433个天体分类为Ia型超新星（SNe）;在这些候选天体中，129个天体具有光谱或COSMOS 2015光度红移，58个天体位于z > 1。我们独特的数据集使z > 1的Ia型SNe的数量增加了一倍，并使II型SNe，高红移超亮SNe，变星和活动星系核的各种时域分析成为可能。
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.