First Release of High-redshift Superluminous Supernovae from the Subaru HIgh-Z SUpernova CAmpaign (SHIZUCA). II. Spectroscopic Properties
First Release of High-redshift Superluminous Supernovae from the Subaru HIgh-Z SUpernova CAmpaign (SHIZUCA). II. Spectroscopic Properties
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DOI：
10.3847/1538-4365/ab07c8
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
C. Curtin;J. Cooke;T. Moriya;Masayuki Tanaka;R. Quimby;S. Bernard;L. Galbany;Jiachen Jiang;Chien-Hsiu Lee;K. Maeda;T. Morokuma;K. Nomoto;G. Pignata;T. Pritchard;N. Suzuki;I. Takahashi;Masaomi Tanaka;N. Tominaga;M. Yamaguchi;N. Yasuda
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文献类型：
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作者：
C. Curtin;J. Cooke;T. Moriya;Masayuki Tanaka;R. Quimby;S. Bernard;L. Galbany;Jiachen Jiang;Chien-Hsiu Lee;K. Maeda;T. Morokuma;K. Nomoto;G. Pignata;T. Pritchard;N. Suzuki;I. Takahashi;Masaomi Tanaka;N. Tominaga;M. Yamaguchi;N. Yasuda
我们提出了三个可能的高红移超亮超新星（SLSNe）从斯巴鲁高Z sUpernova CAmpaign（SHIZUCA）的凯克光谱观测，确认红移为1.851，1.965和2.399。从多波段光度红移中选择宿主星系进行瞬态监测。超新星是在其上升过程中被探测到的，而经典的光谱是在接近最大光的时候收集的。静止帧远紫外（1000-2500 nm）光谱包括一个显着的主机星系流量的贡献，我们比较我们的主机星系扣除光谱的紫外发光SNe从文献中。虽然这里给出的光谱的信噪比足以确认红移，超新星光谱类型的确认仍然没有定论。第一个SHIZUCA Keck光谱后续计划的成功表明，像SHIZUCA这样的活动能够以足够的精度，速度和深度识别高红移SLSNe，以便快速，节奏良好和信息丰富的后续行动。
We present Keck spectroscopic observations of three probable high-redshift superluminous supernovae (SLSNe) from the Subaru HIgh-Z sUpernova CAmpaign (SHIZUCA), confirming redshifts of 1.851, 1.965, and 2.399. The host galaxies were selected for transient monitoring from multiband photometric redshifts. The supernovae are detected during their rise, and the classically scheduled spectra are collected near maximum light. The rest-frame far-ultraviolet (∼1000–2500 Å) spectra include a significant host galaxy flux contribution, and we compare our host-galaxy-subtracted spectra to UV-luminous SNe from the literature. While the signal-to-noise ratios of the spectra presented here are sufficient for redshift confirmation, supernova spectroscopic type confirmation remains inconclusive. The success of the first SHIZUCA Keck spectroscopic follow-up program demonstrates that campaigns such as SHIZUCA are capable of identifying high-redshift SLSNe with sufficient accuracy, speed, and depth for rapid, well-cadenced, and informative follow-up.