利用DECam进行高质量河外遗留场监测（HELM）
星系天体物理
2024-02-12 v1
摘要
高质量河外遗留场监测（HELM）是一个长期观测项目，利用CTIO 4米Blanco望远镜上的暗能量相机（DECam）成像仪对几个经过充分研究的河外遗留场进行光度监测。自2019年2月以来，HELM一直在监测COSMOS、XMM-LSS、CDF-S、S-CVZ、ELAIS-S1和SDSS Stripe 82内的区域，在波段以数天为间隔进行观测，总天区面积约为38平方度。HELM的主要科学目标是为大量活动星系核（AGNs）样本提供高质量光学光变曲线，并通过结合这些遗留场过去和未来的光学光变曲线，建立长达数十年的时间基线。这些光学图像和光变曲线将有助于测量AGN反响映射时延，以及研究AGN变异性及其对吸积性质的依赖关系。此外，时间分辨和叠加的DECam测光数据将支持从星系演化到时域科学的广泛科学应用。我们描述了该项目的设计和实施，并发布了第一批数据，包括源星表以及2019A至2022A期间约3.5年的光变曲线。
引用
@article{arxiv.2402.06052,
title = {High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam},
author = {Ming-Yang Zhuang and Qian Yang and Yue Shen and Monika Adamow and Douglas N. Friedel and R. A. Gruendl and Xin Liu and Paul Martini and Timothy M. C. Abbott and Scott F. Anderson and Roberto J. Assef and Franz E. Bauer and Rich Bielby and W. N. Brandt and Colin J. Burke and Jorge Casares and Yu-Ching Chen and Gisella De Rosa and Alex Drlica-Wagner and Tom Dwelly and Alice Eltvedt and Gloria Fonseca Alvarez and Jianyang Fu and Cesar Fuentes and Melissa L. Graham and Catherine J. Grier and Nathan Golovich and Patrick B. Hall and Patrick Hartigan and Keith Horne and Anton M. Koekemoer and Mirko Krumpe and Jennifer I. Li and Chris Lidman and Umang Malik and Amelia Mangian and Andrea Merloni and Claudio Ricci and Mara Salvato and Rob Sharp and Zachary Stone and David E. Trilling and Brad E. Tucker and Di Wen and Zachary Wideman and Yongquan Xue and Zhefu Yu and Catherine Zucker},
journal= {arXiv preprint arXiv:2402.06052},
year = {2024}
}
备注
11 pages, 8 figures, 4 tables, submitted to ApJS. Median source catalogs and light curves of individual objects are publicly available at https://ariel.astro.illinois.edu/helm/