ogle60 web"ivo://org.gavo.dc/yiannists/q/getThe GAVO DC teamTsapras, Y.GAVO Data Centre Team

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gavo@ari.uni-heidelberg.de+49 6221 54 1837gravitational-microlensinggalactic-bulgebinary-stars We present the analysis of stellar binary microlensing event OGLE-2015-BLG-0060 based on observations obtained from 13 different telescopes. Intensive coverage of the anomalous parts of the light curve was achieved by automated follow-up observations from the robotic telescopes of the Las Cumbres Observatory. We show that, for the first time, all main features of an anomalous microlensing event are well covered by follow-up data, allowing us to estimate the physical parameters of the lens. The strong detection of second-order effects in the event light curve necessitates the inclusion of longer-baseline survey data in order to constrain the parallax vector. We find that the event was most likely caused by a stellar binary-lens with masses M_star1 = 0.87 ± 0.12 Msun and M_star2 = 0.77 ± 0.11Msun. The distance to the lensing system is 6.41 ± 0.14 kpc and the projected separation between the two components is 13.85 ± 0.16 AU. This collection contains lightcurves resulting from different data processing pipelines in a common reduction. See the accompanying paper for details.2019MNRAS.487.4603Thttp://dc.g-vo.org/yiannists/q/get/infoCatalogResearchOptical