ROME/REA: Three-year, Tri-color Timeseries Photometry of the Galactic Bulge

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dc.contributor.authorStreet, R. A.
dc.contributor.authorBachelet, E.
dc.contributor.authorTsapras, Y.
dc.contributor.authorHundertmark, M. P. G.
dc.contributor.authorBozza, V.
dc.contributor.authorBramich, D. M.
dc.contributor.authorCassan, A.
dc.contributor.authorDominik, M.
dc.contributor.authorFiguera Jaimes, R.
dc.contributor.authorHorne, K.
dc.contributor.authorMao, S.
dc.contributor.authorSaha, A.
dc.contributor.authorWambsganss, J.
dc.contributor.authorZang, Weicheng
dc.date.accessioned2025-01-20T16:15:29Z
dc.date.available2025-01-20T16:15:29Z
dc.date.issued2024
dc.description.abstractThe Robotic Observations of Microlensing Events/Reactive Event Assessment Survey was a Key Project at Las Cumbres Observatory (hereafter LCO) which continuously monitored 20 selected fields (3.76 sq.deg) in the Galactic Bulge throughout their seasonal visibility window over a three-year period, between 2017 March and 2020 March. Observations were made in three optical passbands (SDSS-g ', -r ', -i '), and LCO's multi-site telescope network enabled the survey to achieve a typical cadence of similar to 10 hr in i ' and similar to 15 hr in g ' and r ' . In addition, intervals of higher cadence (<1 hr) data were obtained during monitoring of key microlensing events within the fields. This paper describes the Difference Image Analysis data reduction pipeline developed to process these data, and the process for combining the photometry from LCO's three observing sites in the Southern Hemisphere. The full timeseries photometry for all similar to 8 million stars, down to a limiting magnitude of i similar to 18 mag is provided in the data release accompanying this paper, and samples of the data are presented for exemplar microlensing events, illustrating how the tri-band data are used to derive constraints on the microlensing source star parameters, a necessary step in determining the physical properties of the lensing object. The timeseries data also enables a wealth of additional science, for example in characterizing long-timescale stellar variability, and a few examples of the data for known variables are presented.
dc.fuente.origenWOS
dc.identifier.doi10.1088/1538-3873/ad4e69
dc.identifier.eissn1538-3873
dc.identifier.issn0004-6280
dc.identifier.urihttps://doi.org/10.1088/1538-3873/ad4e69
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90497
dc.identifier.wosidWOS:001249986500001
dc.issue.numero6
dc.language.isoen
dc.revistaPublications of the astronomical society of the pacific
dc.rightsacceso restringido
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleROME/REA: Three-year, Tri-color Timeseries Photometry of the Galactic Bulge
dc.typeartículo
dc.volumen136
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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