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OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic repeating event with the second perturbation predicted by real-time analysis
journal contribution
posted on 2023-05-17, 04:00 authored by Ryu, YH, Han, C, Hwang, KH, Street, R, Udalski, A, Sumi, T, Fukui, A, Beaulieu, JP, Gould, A, Dominik, M, Abe, F, Bennett, DP, Bond, IA, Botzler, CS, Furusawa, K, Hayashi, F, Hearnshaw, JB, Hosaka, S, Itrow, Y, Kamiya, K, Kilmartin, PM, Korpela, A, Lin, W, Ling, CH, Makita, S, Masuda, K, Matsubara, Y, Miyake, N, Muraki, Y, Nishimoto, K, Ohnishi, K, Perrott, YC, Rattenbury, N, Saito, TO, Skuljan, L, Sullivan, DJ, Suzuki, D, Sweatman, L, Tristram, PJ, Wada, K, Yock, PCM, Szymanski, MK, Kubiak, M, Pietrzynski, G, Poleski, R, Soszynski, I, Szewczyk, O, Wyrzykowski, L, Ulaczyk, K, Bos, M, Christie, GW, Depoy, DL, Gal-Yam, A, Gaudi, BS, Kaspi, S, Lee, CU, Maoz, D, McCormick, J, Monard, B, Moorhouse, D, Pogge, RW, Polishook, D, Shvartzvald, Y, Shporer, A, Thornley, G, Yee, JC, Albrow, MD, Batista, V, Brillant, S, Cassan, A, Andrew ColeAndrew Cole, Corrales, E, Coutures, CH, Dieters, S, Fouque, P, Greenhill, J, Menzies, J, Allan, A, Bramich, DM, Browne, P, Horne, K, Kains, N, Snodgrass, C, Steele, I, Tsapras, Y, Bozza, V, Burgdorf, MJ, Calchi Novati, S, Dreizler, S, Finet, F, Glitrup, M, Grundahl, F, Harpsoe, K, Hessman, FV, Hinse, TC, Hundertmark, M, Jorgensen, UG, Liebig, C, Maier, G, Mancini, L, Mathiasen, M, Rahvar, S, Ricci, D, Scarpetta, G, Skottfelt, J, Surdej, J, Southworth, J, Wambsganss, J, Zimmer, FWe report the result of the analysis of a dramatic repeating gravitational microlensing event OGLE-2009-BLG-092/MOA-2009-BLG-137, for which the light curve is characterized by two distinct peaks with perturbations nearboth peaks. We find that the event is produced by the passage of the source trajectory over the central perturbationregions associated with the individual components of a wide-separation binary. The event is special in the sense thatthe second perturbation, occurring 100 days after the first, was predicted by the real-time analysis conducted afterthe first peak, demonstrating that real-time modeling can be routinely done for binary and planetary events.With thedata obtained from follow-up observations covering the second peak, we are able to uniquely determine the physicalparameters of the lens system.We find that the event occurred on a bulge clump giant and itwas produced by a binarylens composed of a K- and M-type main-sequence stars. The estimated masses of the binary components are M1 = 0.69K 0.11M andM2 = 0.36 0.06M, respectively, and they are separated in projection by r = 10.9 1.3AU.The measured distance to the lens is DL = 5.6 0.7 kpc. We also detect the orbital motion of the lens system.
History
Publication title
Astrophysical JournalVolume
723Pagination
81-88ISSN
0004-637XDepartment/School
School of Natural SciencesPublisher
Univ Chicago PressPlace of publication
1427 E 60Th St, Chicago, USA, Il, 60637-2954Rights statement
Copyright © 2009 The American Astronomical SocietyRepository Status
- Restricted