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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


Ryu, YH and Han, C and Hwang, KH and Street, R and Udalski, A and Sumi, T and Fukui, A and Beaulieu, JP and Gould, A and Dominik, M and Abe, F and Bennett, DP and Bond, IA and Botzler, CS and Furusawa, K and Hayashi, F and Hearnshaw, JB and Hosaka, S and Itrow, Y and Kamiya, K and Kilmartin, PM and Korpela, A and Lin, W and Ling, CH and Makita, S and Masuda, K and Matsubara, Y and Miyake, N and Muraki, Y and Nishimoto, K and Ohnishi, K and Perrott, YC and Rattenbury, N and Saito, TO and Skuljan, L and Sullivan, DJ and Suzuki, D and Sweatman, L and Tristram, PJ and Wada, K and Yock, PCM and Szymanski, MK and Kubiak, M and Pietrzynski, G and Poleski, R and Soszynski, I and Szewczyk, O and Wyrzykowski, L and Ulaczyk, K and Bos, M and Christie, GW and Depoy, DL and Gal-Yam, A and Gaudi, BS and Kaspi, S and Lee, CU and Maoz, D and McCormick, J and Monard, B and Moorhouse, D and Pogge, RW and Polishook, D and Shvartzvald, Y and Shporer, A and Thornley, G and Yee, JC and Albrow, MD and Batista, V and Brillant, S and Cassan, A and Cole, A and Corrales, E and Coutures, CH and Dieters, S and Fouque, P and Greenhill, J and Menzies, J and Allan, A and Bramich, DM and Browne, P and Horne, K and Kains, N and Snodgrass, C and Steele, I and Tsapras, Y and Bozza, V and Burgdorf, MJ and Calchi Novati, S and Dreizler, S and Finet, F and Glitrup, M and Grundahl, F and Harpsoe, K and Hessman, FV and Hinse, TC and Hundertmark, M and Jorgensen, UG and Liebig, C and Maier, G and Mancini, L and Mathiasen, M and Rahvar, S and Ricci, D and Scarpetta, G and Skottfelt, J and Surdej, J and Southworth, J and Wambsganss, J and Zimmer, F, OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic repeating event with the second perturbation predicted by real-time analysis, Astrophysical Journal , 723, (1) pp. 81-88. ISSN 0004-637X (2010) [Refereed Article]

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Copyright © 2009 The American Astronomical Society

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DOI: doi:10.1088/0004-637X/723/1/81


We 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 near both peaks. We find that the event is produced by the passage of the source trajectory over the central perturbation regions associated with the individual components of a wide-separation binary. The event is special in the sense that the second perturbation, occurring ”­100 days after the first, was predicted by the real-time analysis conducted after the first peak, demonstrating that real-time modeling can be routinely done for binary and planetary events.With the data obtained from follow-up observations covering the second peak, we are able to uniquely determine the physical parameters of the lens system.We find that the event occurred on a bulge clump giant and itwas produced by a binary lens composed of a K- and M-type main-sequence stars. The estimated masses of the binary components are M1 = 0.69”¾0.11M andM2 = 0.36”¾0.06M, respectively, and they are separated in projection by r”Ń = 10.9”¾1.3AU. The measured distance to the lens is DL = 5.6 ”¾ 0.7 kpc. We also detect the orbital motion of the lens system.

Item Details

Item Type:Refereed Article
Keywords:gravitational lensing: micro
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Stellar astronomy and planetary systems
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Cole, A (Associate Professor Andrew Cole)
UTAS Author:Greenhill, J (Dr John Greenhill)
ID Code:65909
Year Published:2010
Web of Science® Times Cited:13
Deposited By:Physics
Deposited On:2010-12-09
Last Modified:2011-03-24

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