| Autor: |
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, C, Steele, I A |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; 8/21/2019, Vol. 487 Issue 4, p4603-4614, 12p |
| Abstrakt: |
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 |$M_{\star 1} = 0.87 \pm 0.12 \, \mathrm{M}_{\odot }$| and |$M_{\star 2} = 0.77 \pm 0.11 \, \mathrm{M}_{\odot }$|. 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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