Tsapras YCassan ARanc CBachelet EStreet RUdalski AHundertmark MBozza VBeaulieu JPMarquette JBEuteneuer EBramich DMDominik MFiguera Jaimes RHorne KMao SMenzies JSchmidt RSnodgrass CSteele IAWambsganss JMróz PSzymański MKSoszyński ISkowron JPietrukowicz PKozłowski SPoleski RUlaczyk KPawlak MJørgensen UGSkottfelt JPopovas ACiceri SKorhonen HKuffmeier MEvans DFPeixinho NHinse TCBurgdorf MJSouthworth JTronsgaard RKerins EAndersen MIRahvar SWang YWertz ORabus MCalchi Novati SD'Ago GScarpetta GMancini LAbe FAsakura YBennett DPBhattacharya ADonachie MEvans PFukui AHirao YItow YKawasaki KKoshimoto NLi MCALing CHMasuda KMatsubara YMuraki YMiyazaki SNagakane MOhnishi KRattenbury NSaito TSharan AShibai HSullivan DJSumi TSuzuki DTristram PJYamada TYonehara AThe RoboNet teamThe OGLE collaborationThe MiNDSTEp collaborationThe MOA collaboration2024-07-242024-07-242019-08Tsapras Y, Cassan A, Ranc C, Bachelet E, Street R, Udalski A, Hundertmark M, Bozza V, Beaulieu JP, Marquette JB, Euteneuer E, Bramich DM, Dominik M, Figuera Jaimes R, Horne K, Mao S, Menzies J, Schmidt R, Snodgrass C, Steele IA, Wambsganss J, Mróz P, Szymański MK, Soszyński I, Skowron J, Pietrukowicz P, Kozłowski S, Poleski R, Ulaczyk K, Pawlak M, Jørgensen UG, Skottfelt J, Popovas A, Ciceri S, Korhonen H, Kuffmeier M, Evans DF, Peixinho N, Hinse TC, Burgdorf MJ, Southworth J, Tronsgaard R, Kerins E, Andersen MI, Rahvar S, Wang Y, Wertz O, Rabus M, Calchi Novati S, D'ago G, Scarpetta G, Mancini L, Abe F, Asakura Y, Bennett DP, Bhattacharya A, Donachie M, Evans P, Fukui A, Hirao Y, Itow Y, Kawasaki K, Koshimoto N, Li MCA, Ling CH, Masuda K, Matsubara Y, Muraki Y, Miyazaki S, Nagakane M, Ohnishi K, Rattenbury N, Saito T, Sharan A, Shibai H, Sullivan DJ, Sumi T, Suzuki D, Tristram PJ, Yamada T, 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).0035-8711https://mro.massey.ac.nz/handle/10179/70338We 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 = 0.87 pm 0.12 mathrm{M} and M = 0.77 pm 0.11 mathrm{M}. 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.(c) The author/sgravitational lensing: micromethods: observationaltechniques: photometricGalaxy: bulgeJournal article10.1093/mnras/stz14041365-2966journal-article4603-4614http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000475888500013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=c5bb3b2499afac691c2e3c1a83ef6fef