来自IfA深度调查的修订超新星速率
Revised Supernova Rates from the IfA Deep Survey
摘要：
IfA Deep的调查发现了大约130个热核超新星（TNSNe，即Ia型）候选者，其红移从z=0.1到超过z=1。从这些数据中得出的TNSN爆炸率一直存在争议，与其他调查中出现的证据相冲突。这项工作重新审视了IfA的深度调查，以重新评估光度证据。应用SOFT程序的所有SN候选人的光变曲线，我们得到新的分类等级和红移估计。我们发现z~0.5的体积速率大大小于最初公布的值，使修订后的IfA深度速率与其他调查吻合得很好。通过我们改进的光度分析技术，我们能够自信地将速率测量扩展到更高的红移，并且我们发现TNSN速率稳步增加，没有迹象表明z=1.05的峰值。
英文摘要：
The IfA Deep survey uncovered ~130 thermonuclear supernovae (TNSNe, i.e. Type Ia) candidates at redshifts from z=0.1 out to beyond z=1. The TNSN explosion rates derived from these data have been controversial, conflicting with evidence emerging from other surveys. This work revisits the IfA Deep survey to re-evaluate the photometric evidence. Applying the SOFT program to the light curves of all SN candidates, we derive new classification grades and redshift estimates. We find a volumetric rate for z~0.5 that is substantially smaller than the originally published values, bringing the revised IfA Deep rate into good agreement with other surveys. With our improved photometric analysis techniques, we are able to confidently extend the rate measurements to higher redshifts, and we find a steadily increasing TNSN rate, with no indication of a peak out to z=1.05.
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