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Difference Image Analysis of Galactic Microlensing.II. Microlensing Events

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dc.contributor.authorAlcock, Charles
dc.contributor.authorAllsman, Robyn
dc.contributor.authorAlves, David R
dc.contributor.authorAxelrod, Tim
dc.contributor.authorBecker, Andrew C
dc.contributor.authorBennett, D P
dc.contributor.authorCook, Kem H
dc.contributor.authorDrake, Andrew John
dc.contributor.authorFreeman, Kenneth
dc.contributor.authorGriest, K
dc.contributor.authorLehner, M J
dc.contributor.authorMarshall, S L
dc.contributor.authorMinniti, Dante
dc.contributor.authorPeterson, Bruce
dc.contributor.authorPratt, M
dc.contributor.authorQuinn, Peter J
dc.contributor.authorStubbs, Christopher W
dc.contributor.authorSutherland, William J
dc.contributor.authorTomaney, A B
dc.contributor.authorVandehei, T
dc.contributor.authorWelch, D L
dc.date.accessioned2015-12-13T23:23:10Z
dc.date.available2015-12-13T23:23:10Z
dc.date.issued1999
dc.date.updated2015-12-12T09:14:17Z
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.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1885/91786
dc.publisherIOP Publishing
dc.sourceAstrophysical Journal, The
dc.subjectKeywords: Atmospheric effects; Galaxy: stellar content; Gravitational lensing; Techniques: image processing
dc.titleDifference Image Analysis of Galactic Microlensing.II. Microlensing Events
dc.typeJournal article
local.bibliographicCitation.lastpage179
local.bibliographicCitation.startpage171
local.contributor.affiliationAlcock, Charles, Lawrence Livermore National Laboratory
local.contributor.affiliationAllsman, Robyn, Administrative Division, ANU
local.contributor.affiliationAlves, David R, Space Telescope Science Institute
local.contributor.affiliationAxelrod, Tim, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBecker, Andrew C, University of Washington
local.contributor.affiliationBennett, D P, University of Notre Dame
local.contributor.affiliationCook, Kem H, Lawrence Livermore National Laboratory
local.contributor.affiliationDrake, Andrew John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFreeman, Kenneth, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGriest, K, University of California
local.contributor.affiliationLehner, M J, University of Pennsylvania
local.contributor.affiliationMarshall, S L, Kavli Institute for Particle Astrophysics and Cosmology/Stanford University
local.contributor.affiliationMinniti, Dante, Lawrence Livermore National Laboratory
local.contributor.affiliationPeterson, Bruce, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationPratt, M, LIGO Massachusetts Institute of Technology
local.contributor.affiliationQuinn, Peter J, European Southern Observatory
local.contributor.affiliationStubbs, Christopher W, University of Washington
local.contributor.affiliationSutherland, William J, University of Cambridge
local.contributor.affiliationTomaney, A B, University of Washington
local.contributor.affiliationVandehei, T, University of California
local.contributor.affiliationWelch, D L, McMaster University
local.contributor.authoruidAllsman, Robyn, u9412141
local.contributor.authoruidAxelrod, Tim, u9113679
local.contributor.authoruidDrake, Andrew John, u960579
local.contributor.authoruidFreeman, Kenneth, u7000399
local.contributor.authoruidPeterson, Bruce, u8000960
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationMigratedxPub22653
local.identifier.citationvolume124
local.identifier.doi10.1086/313258
local.identifier.scopusID2-s2.0-0040348630
local.type.statusPublished Version

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