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19 January 2025

» arxiv » astro-ph/0701300

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The Optical Gravitational Lensing Experiment. OGLE-III Long Term Monitoring of the Gravitational Lens QSO 2237+0305
A. Udalski ; M.K. Szymanski ; M. Kubiak ; G. Pietrzynski ; I. Soszynski ; K. Zebrun ; O. Szewczyk ; L. Wyrzykowski ; K. Ulaczyk ; T. Wieckowski ;
Date:	10 Jan 2007
Journal:	Acta Astronomica 2006, 56, 293
Abstract:	We present results of the long term monitoring of the gravitational lens QSO 2237+0305 conducted during the OGLE survey. Light curves of all four components of the lens obtained during the second phase of the OGLE project (OGLE-II; 1997-2000) are supplemented with the data collected in the OGLE-III phase in the observing seasons 2001-2006. Calibration procedures to tie the new OGLE-III data with already calibrated OGLE-II light curves are described. The resulting homogeneous OGLE data set is the most extensive photometric coverage of the gravitational lens QSO 2237+0305, spanning now one decade - the seasons from 1997 to 2006 - and revealing unique microlensing activity of this spectacular object. All photometric data of the gravitational lens QSO 2237+0305 collected by OGLE are available to the astronomical community from the OGLE Internet archive.
Source:	arXiv, astro-ph/0701300
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