| Title: |
High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam : project overview and first data release |
| Authors: |
Zhuang, Ming-Yang; Yang, Qian; Shen, Yue; Adamów, Monika; Friedel, Douglas N.; Gruendl, R. A.; Stone, Zachary; Li, Junyao; Liu, Xin; Martini, Paul; Abbott, Timothy M. C.; Anderson, Scott F.; Assef, Roberto J.; Bauer, Franz E.; Bielby, Richard; Brandt, W. N.; Burke, Colin J.; Casares, Jorge; Chen, Yu-Ching; De Rosa, Gisella; Drlica-Wagner, Alex; Dwelly, Tom; Eltvedt, Alice; Fonseca Alvarez, Gloria; Fu, Jianyang; Fuentes, Cesar; Graham, Melissa L.; Grier, Catherine J.; Golovich, Nathan; Hall, Patrick B.; Hartigan, Patrick; Horne, Keith; Koekemoer, Anton M.; Krumpe, Mirko; Li, Jennifer I.; Lidman, Chris; Malik, Umang; Mangian, Amelia; Merloni, Andrea; Ricci, Claudio; Salvato, Mara; Sharp, Rob; Trilling, David E.; Tucker, Brad E.; Wen, Di; Wideman, Zachary; Xue, Yongquan; Yu, Zhefu; Zucker, Catherine |
| Contributors: |
University of St Andrews.School of Physics and Astronomy; University of St Andrews.St Andrews Centre for Exoplanet Science |
| Publication Year: |
2024 |
| Collection: |
University of St Andrews: Digital Research Repository |
| Subject Terms: |
Optical astronomy; Galactic and extragalactic astronomy; Quasars; Time domain astronomy; Surveys; QB Astronomy; 3rd-NDAS; QB |
| Description: |
Funding: This work is supported by NSF grants AST-2206499 and AST-2308077. R.J.A. was supported by FONDECYT grant No. 1231718 and by the ANID BASAL project FB210003. F.E.B. acknowledges support from ANID—Millennium Science Initiative Program —ICN12_009, CATA-BASAL—FB210003, and FONDECYT Regular—1200495. Y.Q.X. acknowledges support from the National Key R&D Program of China (2023YFA1608100), NSFC grants (12025303, 12393814), and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB0550300). ; High-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied extragalactic legacy fields with the Dark Energy Camera (DECam) imager on the CTIO 4 m Blanco telescope. Since 2019 February, HELM has been monitoring regions within COSMOS, XMM-LSS, CDF-S, S-CVZ, ELAIS-S1, and SDSS Stripe 82 with few-day cadences in the (u)gri(z) bands, over a collective sky area of ∼38 deg2. The main science goal of HELM is to provide high-quality optical light curves for a large sample of active galactic nuclei (AGNs), and to build decades-long time baselines when combining past and future optical light curves in these legacy fields. These optical images and light curves will facilitate the measurements of AGN reverberation mapping lags, as well as studies of AGN variability and its dependencies on accretion properties. In addition, the time-resolved and coadded DECam photometry will enable a broad range of science applications from galaxy evolution to time-domain science. We describe the design and implementation of the program and present the first data release that includes source catalogs and the first ∼3.5 yr of light curves during 2019A–2022A. ; Peer reviewed |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
Astrophysical Journal Supplement Series; 309340713; 85207283630; Jisc: 2329748; manuscript: ad7d01; other: aas52855; https://hdl.handle.net/10023/30709; https://www.scopus.com/pages/publications/85207283630; https://arxiv.org/abs/2402.06052v1 |
| DOI: |
10.3847/1538-4365/ad7d01 |
| Availability: |
https://hdl.handle.net/10023/30709; https://doi.org/10.3847/1538-4365/ad7d01; https://www.scopus.com/pages/publications/85207283630; https://arxiv.org/abs/2402.06052v1 |
| Rights: |
Copyright © 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| Accession Number: |
edsbas.57D23230 |
| Database: |
BASE |