High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam: Project Overview and First Data Release

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dc.contributor.authorZhuang, Ming-Yang
dc.contributor.authorYang, Qian
dc.contributor.authorShen, Yue
dc.contributor.authorAdamow, Monika
dc.contributor.authorFriedel, Douglas N.
dc.contributor.authorGruendl, R. A.
dc.contributor.authorStone, Zachary
dc.contributor.authorLi, Junyao
dc.contributor.authorLiu, Xin
dc.contributor.authorMartini, Paul
dc.contributor.authorAbbott, Timothy M. C.
dc.contributor.authorAnderson, Scott F.
dc.contributor.authorAssef, Roberto J.
dc.contributor.authorBauer, Franz E.
dc.contributor.authorBielby, Richard
dc.contributor.authorBrandt, W. N.
dc.contributor.authorBurke, Colin J.
dc.contributor.authorCasares, Jorge
dc.contributor.authorChen, Yu-Ching
dc.contributor.authorDe Rosa, Gisella
dc.contributor.authorDrlica-Wagner, Alex
dc.contributor.authorDwelly, Tom
dc.contributor.authorEltvedt, Alice
dc.contributor.authorAlvarez, Gloria Fonseca
dc.contributor.authorFu, Jianyang
dc.contributor.authorFuentes, Cesar
dc.contributor.authorGraham, Melissa L.
dc.contributor.authorGrier, Catherine J.
dc.contributor.authorGolovich, Nathan
dc.contributor.authorHall, Patrick B.
dc.contributor.authorHartigan, Patrick
dc.contributor.authorHorne, Keith
dc.contributor.authorKoekemoer, Anton M.
dc.contributor.authorKrumpe, Mirko
dc.contributor.authorLi, Jennifer I.
dc.contributor.authorLidman, Chris
dc.contributor.authorMalik, Umang
dc.contributor.authorMangian, Amelia
dc.contributor.authorMerloni, Andrea
dc.contributor.authorRicci, Claudio
dc.contributor.authorSalvato, Mara
dc.contributor.authorSharp, Rob
dc.contributor.authorTrilling, David E.
dc.contributor.authorTucker, Brad E.
dc.contributor.authorWen, Di
dc.contributor.authorWideman, Zachary
dc.contributor.authorXue, Yongquan
dc.contributor.authorYu, Zhefu
dc.contributor.authorZucker, Catherine
dc.date.accessioned2025-01-20T16:06:32Z
dc.date.available2025-01-20T16:06:32Z
dc.date.issued2024
dc.description.abstractHigh-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 similar to 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 similar to 3.5 yr of light curves during 2019A-2022A.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4365/ad7d01
dc.identifier.eissn1538-4365
dc.identifier.issn0067-0049
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ad7d01
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89964
dc.identifier.wosidWOS:001330149100001
dc.issue.numero2
dc.language.isoen
dc.revistaAstrophysical journal supplement series
dc.rightsacceso restringido
dc.titleHigh-quality Extragalactic Legacy-field Monitoring (HELM) with DECam: Project Overview and First Data Release
dc.typeartículo
dc.volumen274
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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