J/A+A/674/A170ivo://CDS.VizieR/J/A+A/674/A170doi:10.26093/cds/vizier.36740170CDSAdam R.Z.Hajdu T.Bodi A.Hajdu R.Szklenar T.Molnar L.2024-11-28T20:03:42Z2023-06-19T08:30:07ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.freclipsing-binary-starsvariable-starsphotometryvisible-astronomyThe Optical Gravitational Lensing Experiment (OGLE) observed around 450000 eclipsing binaries (EBs) towards the Galactic Bulge. Decade-long photometric observations such as these provide an exceptional opportunity to thoroughly examine the targets. However, observing dense stellar fields such as the Bulge may result in blends and contamination by close objects. We searched for periodic variations in the residual light curves of EBs in OGLE-IV and created a new catalogue for the EBs that contain 'background' signals after the investigation of the source of the signal. From the about half a million EB systems, we selected those that contain more than 4000 data points. We fitted the EB signal with a simple model and subtracted it. To identify periodical signals in the residuals, we used a GPU-based phase dispersion minimisation python algorithm called cuvarbase and validated the found periods with Lomb-Scargle periodograms. We tested the reliability of our method with artificial light curves. We identified 354 systems where short-period background variation was significant. In these cases, we determined whether it is a new variable or just the result of contamination by an already catalogued nearby one. We classified 292 newly found variables into EB, {delta} Scuti, or RR Lyrae categories, or their sub-classes, and collected them in a catalogue. We also discovered four new doubly eclipsing systems and one eclipsing multiple system with a {delta} Scuti variable, and modelled the outer orbits of the components.2023A&A...674A.170Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A170CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AcA/66/405 : Galactic bulge eclipsing & ellipsoidal binarieshttps://www.astrouw.edu.pl/ogle/ogle4/OCVS/blg/ecl : OGLE Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A170https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A170http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A170https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A170https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A170http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A170GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/674/A170/table1Eclipsing binary systems whose photometry contains a signal of a known background variableSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName1OGLE-IV ID of the binarymeta.id;meta.maincharName2OGLE-IV ID of known background variablemeta.id;instr.backgroundcharJ/A+A/674/A170/tablec1Results of image-based classification for the background variablesTypeMost probable variability type (1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameOGLE-IV ID of the binarymeta.id;meta.maincharJ/A+A/674/A170/tableb1Eclipsing binary systems with a new variable in the backgroundNameOGLE-IV ID of the binarymeta.id;meta.maincharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPer1Orbital period of the binarydtime.perioddoublePer2Orbital period of the background variabledinstr.backgrounddoubleTypeVariability subtype of the background variableinstr.backgroundcharLCShow the light curvesmeta.ref.urlcharFileNameName of the light curve file in subdirectory lcmeta.id;meta.filechar