An analysis of binary microlensing event OGLE-2015-BLG-0060

Tsapras Y.; Cassan, A; Ranc C.; Bachelet E.; Street R.; Udalski A.; Hundertmark M.; Bozza V.; Beaulieu J.P.; Marquette J.B.; Euteneuer E.; Bramich, D. M.; Dominik M.; Figuera Jaimes R.; Horne K.; et. al.

Abstract

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 and . The distance to the lensing system is 6.41 +/- 0.14kpc and the projected separation between the two components is 13.85 +/- 0.16 au. Alternative interpretations are also considered.

Más información

Título según WOS: An analysis of binary microlensing event OGLE-2015-BLG-0060
Título según SCOPUS: An analysis of binary microlensing event OGLE-2015-BLG-0060
Título de la Revista: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volumen: 487
Número: 4
Editorial: OXFORD UNIV PRESS
Fecha de publicación: 2019
Página de inicio: 4603
Página final: 4614
Idioma: English
DOI:

10.1093/mnras/stz1404

Notas: ISI, SCOPUS