OGLE-III Galactic bulge microlensing events : J/ApJS/216/12

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Authors : Wyrzykowski L. orcid , Rynkiewicz A.E., Skowron J. (hide) , Rynkiewicz A.E., Skowron J. et..al

VizieR DOI : 10.26093/cds/vizier.22160012
Bibcode : 2015ApJS..216...12W (ADS) (Simbad) (Objects)
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CDS Keywords : Gravitational lensing; Milky Way
UAT : Gravitational lensing, Milky Way Galaxy

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Inserted into VizieR : 04-Mar-2015
Last modification : 12-Jun-2017

OGLE-III microlensing events and the structure of the Galactic bulge. (2015)

Keywords : catalogs; Galaxy bulge; Galaxy: structure; gravitational lensing: micro

Abstract:We present and study the largest and most comprehensive catalog of microlensing events ever constructed. The sample of standard microlensing events comprises 3718 unique events from 2001-2009 with 1409 events that had not been detected before in real-time by the Early Warning System of the Optical Gravitational Lensing Experiment. The search pipeline uses machine learning algorithms to help find rare phenomena among 150 million objects and to derive the detection efficiency. Applications of the catalog can be numerous, from analyzing individual events to large statistical studies of the Galactic mass, kinematics distributions, and planetary abundances. We derive maps of the mean Einstein ring crossing time of events spanning ...(more)
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The data used in this work were photometry of 150 million objects toward more than 31deg^2^ of the Galactic bulge observed in almost 74000 frames, i.e., about 11000 billion data points. We selected 91 fields out of all 177 ever observed by the Optical Gravitational Lensing Experiment (OGLE) Udalski et al. (2008AcA....58...69U) in its third phase from 2001 July until 2009 May, which had at least 250 observations. We use the re-reduced data obtained after the end of OGLE-III. For the final sample of microlensing events, we additionally produced new photometry which took into account the exact position of each event on the difference imaging technique (DIA, Wozniak 2000, J/AcA/50/421) image (see section 2). 


                


                

                    

                


                

                    

                


                

                    
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