论文标题
DECAM的时间域中进行深入钻探：调查表征
Deep Drilling in the Time Domain with DECam: Survey Characterization
论文作者
论文摘要
本文对四个深钻孔（DDFS），两个银河系和两个外层次进行了一项新的光学成像调查，在Cerro Tololo tololo Intererican Interrican Perservatory（CTIO）上的4米Blanco望远镜上有深色能量摄像头（DECAM）。在2021年观察的第一年中，$> $> $ 4000的图像涵盖21平方学（7个Decam指数），$ \ sim $ \ sim $ 40时，每个场地（夜晚）和每晚每晚5到6张图像，每晚$ g $，$ r $，$ i $和/或$ z $中的每个过滤器已公开可用（该计划的专有时间）。我们描述了实时差异图像管道以及如何通过与Zwicky瞬态设施（ZTF）相同的分配系统分配给经纪人的警报。在本文中，我们专注于两个外层状深场（Cosmos和Elais-S1），描述了检测到的来源，并证明了调查设计有效地探测了微弱且快速变化且瞬态源的发现空间。我们根据瞬态和变量的差异图像检测光度法来描述并使公开可用的4413校准光曲线。我们还提出了有关太阳系小体，恒星耀斑和变量，银河系异常检测，快速升高的瞬态和变量，超新星和主动银河核的初步科学分析。
This paper presents a new optical imaging survey of four deep drilling fields (DDFs), two Galactic and two extragalactic, with the Dark Energy Camera (DECam) on the 4 meter Blanco telescope at the Cerro Tololo Inter-American Observatory (CTIO). During the first year of observations in 2021, $>$4000 images covering 21 square degrees (7 DECam pointings), with $\sim$40 epochs (nights) per field and 5 to 6 images per night per filter in $g$, $r$, $i$, and/or $z$, have become publicly available (the proprietary period for this program is waived). We describe the real-time difference-image pipeline and how alerts are distributed to brokers via the same distribution system as the Zwicky Transient Facility (ZTF). In this paper, we focus on the two extragalactic deep fields (COSMOS and ELAIS-S1), characterizing the detected sources and demonstrating that the survey design is effective for probing the discovery space of faint and fast variable and transient sources. We describe and make publicly available 4413 calibrated light curves based on difference-image detection photometry of transients and variables in the extragalactic fields. We also present preliminary scientific analysis regarding Solar System small bodies, stellar flares and variables, Galactic anomaly detection, fast-rising transients and variables, supernovae, and active galactic nuclei.
