University of Tasmania
Browse

File(s) under permanent embargo

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, F
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 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 Journal

Volume

723

Pagination

81-88

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

Univ Chicago Press

Place of publication

1427 E 60Th St, Chicago, USA, Il, 60637-2954

Rights statement

Copyright © 2009 The American Astronomical Society

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC