Interpretation of strong short-term central perturbations in the light curves of moderate-magnification microlensing events
- Han, C.
- Hwang, K.-H.
- Kim, D.
- Udalski, A.
- Abe, F.
- Monard, L. A. B.
- McCormick, J.
- Szymański, M. K.
- Kubiak, M.
- Pietrzyński, G.
- Soszyński, I.
- Szewczyk, O.
- Wyrzykowski, Ł.
- Ulaczyk, K.
- Bond, I. A.
- Botzler, C. S.
- Fukui, A.
- Furusawa, K.
- Hearnshaw, J. B.
- Itow, Y.
- Kamiya, K.
- Kilmartin, P. M.
- Korpela, A.
- Lin, W.
- Ling, C. H.
- Masuda, K.
- Matsubara, Y.
- Miyake, N.
- Muraki, Y.
- Nagaya, M.
- Ohnishi, K.
- Tokumura, T.
- Perrott, Y. C.
- Rattenbury, N.
- Saito, To.
- Sako, T.
- Skuljan, L.
- Sullivan, D. S.
- Sumi, T.
- Sweatman, W. L.
- Tristram, P. J.
- Yock, P. C. M.
- Allen, W.
- Christie, G. W.
- DePoy, D. L.
- Dong, S.
- Gaudi, B. S.
- Gould, A.
- Lee, C.-U.
- Natusch, T.
- Park, B.-G.
- Pogge, R. W.
- Albrow, M. D.
- Allan, A.
- Batista, V.
- Beaulieu, J. P.
- Bennett, D. P.
- Brillant, S.
- Bode, M.
- Bramich, D. M.
- Burgdorf, M.
- Caldwell, J. A. R.
- Calitz, H.
- Cassan, A.
- Corrales, E.
- Dieters, S.
- Prester, D. D.
- Dominik, M.
- Donatowicz, J.
- Fouque, P.
- Greenhill, J.
- Hill, K.
- Hoffman, M.
- Horne, K.
- Jørgensen, U. G.
- Kains, N.
- Kubas, D.
- Marquette, J. B.
- Martin, R.
- Meintjes, P.
- Menzies, J.
- Pollard, K. R.
- Sahu, K. C.
- Snodgrass, C.
- Steele, I.
- Street, R.
- Tsapras, Y.
- Wambsganss, J.
- Williams, A.
- Zub, M.
DOIAbstract
To improve the planet detection efficiency, current planetary microlensing experiments are focused on high-magnification events searching for planetary signals near the peak of lensing light curves. However, it is known that central perturbations can also be produced by binary companions and thus it is important to distinguish planetary signals from those induced by binary companions. In this paper, we analyze the light curves of microlensing events OGLE-2007-BLG-137/MOA-2007-BLG-091, OGLE-2007-BLG-355/MOA-2007-BLG-278, and MOA-2007-BLG-199/OGLE-2007-BLG-419, for all of which exhibit short-term perturbations near the peaks of the light curves. From detailed modeling of the light curves, we find that the perturbations of the events are cause...
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