Difference image analysis of galactic microlensing. II. Microlensing events

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dc.contributor.authorAlcock, C
dc.contributor.authorAllsman, RA
dc.contributor.authorAlves, D
dc.contributor.authorAxelrod, TS
dc.contributor.authorBecker, AC
dc.contributor.authorBennett, DP
dc.contributor.authorCook, KH
dc.contributor.authorDrake, AJ
dc.contributor.authorFreeman, KC
dc.contributor.authorGriest, K
dc.contributor.authorLehner, MJ
dc.contributor.authorMarshall, SL
dc.contributor.authorMinniti, D
dc.contributor.authorPeterson, BA
dc.contributor.authorPratt, MR
dc.contributor.authorQuinn, PJ
dc.contributor.authorStubbs, CW
dc.contributor.authorSutherland, W
dc.contributor.authorTomaney, A
dc.contributor.authorVandehei, T
dc.contributor.authorWelch, DL
dc.date.accessioned2025-01-21T01:31:54Z
dc.date.available2025-01-21T01:31:54Z
dc.date.issued1999
dc.description.abstractThe MACHO collaboration has been carrying out difference image analysis (DIA) since 1996 with the aim of increasing the sensitivity to the detection of gravitational microlensing. This is a preliminary report on the application of DIA to galactic bulge images in one field. We show how the DIA technique significantly increases the number of detected lensing events, by removing the positional dependence of traditional photometry schemes and lowering the microlensing event detection threshold. This technique, unlike PSF photometry, gives the unblended colors and positions of the microlensing source stars. We present a set of criteria for selecting microlensing events from objects discovered with this technique. The 16 pixel and classical microlensing events discovered with the DIA technique are presented.
dc.fuente.origenWOS
dc.identifier.issn0067-0049
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97164
dc.identifier.wosidWOS:000082977600006
dc.issue.numero1
dc.language.isoen
dc.pagina.final179
dc.pagina.inicio171
dc.revistaAstrophysical journal supplement series
dc.rightsacceso restringido
dc.subjectatmospheric effects
dc.subjectGalaxy : stellar content
dc.subjectgravitational lensing
dc.subjecttechniques : image processing
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleDifference image analysis of galactic microlensing. II. Microlensing events
dc.typeartículo
dc.volumen124
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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