The SED Machine：一种对PTF发现的瞬态事件进行有效分类的谱图
The SED Machine: A Spectrograph to Efficiently Classify Transient Events Discovered by PTF
摘要：
Palomar Transient Factory（PTF）是一个旨在发现宇宙中瞬变现象的项目，包括Ia型超新星，核心坍缩超新星和其他奇异和罕见的瞬变事件。PTF利用帕洛玛48英寸望远镜（P48）来发现瞬变现象，后续主要是帕洛玛60英寸望远镜（P60，用于测光和颜色曲线）以及其他望远镜。PTF的发现率为每年约7000个候选瞬态，但目前只有约10%的候选瞬态被跟踪和分类。为了克服这一缺点，加州理工学院正在为P60望远镜设计和建造一台专用的光谱仪，称为SED机器，旨在最大限度地提高PTF发现的瞬变的分类效率。SED机器是一种低分辨率（R ~ 100）IFU光谱仪。它由一台用于光谱定标的彩虹相机和一个小透镜阵列加三棱镜光学系统组成。这里介绍了SED机器的科学和设计概述。
英文摘要：
The Palomar Transient Factory (PTF) is a project aimed to discover transients in the Universe, including Type Ia supernovae, core-collapse supernovae, and other exotic and rare transient events. PTF utilizes the Palomar 48-inch Telescope (P48) for discovering the transients, and follow-up mainly by the Palomar 60-inch Telescope (P60, for photometric light and color curves), as well as other telescopes. The discovery rate of PTF is about 7000 candidate transients per year, but currently only about 10% of the candidates are being followed-up and classified. To overcome this shortcoming, a dedicated spectrograph, called the SED Machine, is being designed and built at the California Institute of Technology for the P60 Telescope, aiming to maximize the classification efficiency of transients discovered by PTF. The SED Machine is a low resolution (R ~ 100) IFU spectrograph. It consists of a rainbow camera for spectrophotometric calibration, and a lenslet array plus 3-prism optics system for integrated field spectra. An overview of the science and design of the SED Machine is presented here.
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