4 MOST联盟巡天10：时域河外巡天（TiDES）
4MOST Consortium Survey 10: The Time-Domain Extragalactic Survey (TiDES)
摘要：
时域河外巡天（TiDES）的重点是对河外光学瞬变和可变源的光谱跟踪，这些源是从即将进行的大型巡天（如大型综合巡天望远镜（LSST））中选出的。潮汐观测卫星包括三个分观测：（一）超新星状瞬变的光谱观测;（二）对瞬变宿主星系进行全面跟踪，以获得用于宇宙学应用的红移测量值;（三）重复光谱观测，以便能够绘制活动星系核的反射图。我们的模拟预测，我们将能够将瞬态分类到$r = 22.5$星等（AB），并在五年的4 MOST操作中，获得多达30，000个实时瞬态的光谱以红移$z \sim 0.5$，测量多达50，000个瞬态宿主星系的红移以$z \sim 1$，并监测大约700个活动星系核以$z \sim 2.5$。
英文摘要：
The Time-Domain Extragalactic Survey (TiDES) is focused on the spectroscopic follow-up of extragalactic optical transients and variable sources selected from forthcoming large sky surveys such as that from the Large Synoptic Survey Telescope (LSST). TiDES contains three sub-surveys: (i) spectroscopic observations of supernova-like transients; (ii) comprehensive follow-up of transient host galaxies to obtain redshift measurements for cosmological applications; and (iii) repeat spectroscopic observations to enable the reverberation mapping of active galactic nuclei. Our simulations predict we will be able to classify transients down to $r = 22.5$ magnitudes (AB) and, over five years of 4MOST operations, obtain spectra for up to 30,000 live transients to redshift $z \sim 0.5$, measure redshifts for up to 50,000 transient host galaxies to $z \sim 1$ and monitor around 700 active galactic nuclei to $z \sim 2.5$.
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