The Open UniversitySkip to content
 

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; Mao, S; Menzies, J; Schmidt, R; Snodgrass, Colin; Steele, I A; Wambsganss, J; Mróz, P; Szymański, M K; Soszyński, I; Skowron, J; Pietrukowicz, P; Kozłowski, S; Poleski, R; Ulaczyk, K; Pawlak, M; Jørgensen, U G; Skottfelt, J; Popovas, A; Ciceri, S; Korhonen, H; Kuffmeier, M; Evans, D F; Peixinho, N; Hinse, T C; Burgdorf, M J; Southworth, J; Tronsgaard, R; Kerins, E; Andersen, M I; Rahvar, S; Wang, Y; Wertz, O; Rabus, M; Novati, S Calchi; D’Ago, G; Scarpetta, G; Mancini, L; Abe, F; Asakura, Y; Bennett, D P; Bhattacharya, A; Donachie, M; Evans, P; Fukui, A; Hirao, Y; Itow, Y; Kawasaki, K; Koshimoto, N; Li, M C A; Ling, C H; Masuda, K; Matsubara, Y; Muraki, Y; Miyazaki, S; Nagakane, M; Ohnishi, K; Rattenbury, N; Saito, To; Sharan, A; Shibai, H; Sullivan, D J; Sumi, T; Suzuki, D; Tristram, P J; Yamada, T and Yonehara, A (2019). An analysis of binary microlensing event OGLE-2015-BLG-0060. Monthly Notices of the Royal Astronomical Society, 487(4) pp. 4603–4614.

Full text available as:
[img]
Preview
PDF (Version of Record) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (43MB) | Preview
DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/stz1404
Google Scholar: Look up in Google Scholar

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 M⋆1=0.87±0.12M⊙ and M⋆2=0.77±0.11M⊙⁠. 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. Alternative interpretations are also considered.

Item Type: Journal Item
Copyright Holders: 2019 The Author(s)
ISSN: 1365-2966
Keywords: gravitational lensing; micro; methods; observational; techniques; photometric; Galaxy: bulge
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 61700
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 11 Jun 2019 10:31
Last Modified: 16 Aug 2019 11:25
URI: http://oro.open.ac.uk/id/eprint/61700
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Download history for this item

These details should be considered as only a guide to the number of downloads performed manually. Algorithmic methods have been applied in an attempt to remove automated downloads from the displayed statistics but no guarantee can be made as to the accuracy of the figures.

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU