MOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection

Yee, J.~C C.; Hung, L.-W.; Bond, I.~A A.; Allen, W.; Monard, L.~A.~G A. G.; Albrow, M.~D D.; Fouque, P.; Dominik, M.; Tsapras, Y.; Udalski, A.; Gould, A.; Zellem, R.; Bos, M.; Christie, G.~W W.; Depoy, D.~L L.; Dong, Subo; Drummond, J.; Gaudi, B.~S S.; Gorbikov, E.; Han, C.; Kaspi, S.; Wyrzykowski, Ł.; Klein, N.; Lee, C.-U.; Maoz, D.; Mccormick, J.; Moorhouse, D.; Natusch, T.; Nola, M.; Park, B.-G.; Pogge, R.~W W.; Polishook, D.; Shporer, A.; Shvartzvald, Y.; Skowron, J.; Collaboration, μFUN; Thornley, G.; Collaboration, \ensuremathμFUN; Abe, F.; Bennett, D.~P P.; Botzler, C.~S S.; Chote, P.; Freeman, M.; Fukui, A.; Furusawa, K.; Harris, P.; Itow, Y.; Ling, C.~H H.; Masuda, K.; Matsubara, Y.; Miyake, N.; Ohnishi, K.; Rattenbury, N.~J J.; Saito, To-O.; Sullivan, D.~J J.; Sumi, T.; Suzuki, D.; Wyrzykowski, L.; Sweatman, W.~L L.; Tristram, P.~J J.; Wada, K.; Yock, P.~C.~M C. M.; Moa, Collaboration; Szyma\ŉski, M.~K; Szymanski, M. K.; Soszy\ŉski, I.; Soszynski, I.; Kubiak, M.; Poleski, R.; Ulaczyk, K.; Pietrzynski, G.; Pietrzy\ŉski, G.; The RoboNet, Collaboration; Ogle, Collaboration; Saders, J.; van Saders, J.; Bachelet, E.; Batista, V.; Wyrzykowski, [Unknown]; Beatty, T.~G G.; Beaulieu, J.-P.; Bennett, C.~S S.; Bowens-rubin, R.; Brillant, S.; Caldwell, J.~A.~R A. R.; Cassan, A.; Cole, Aa A.~A; Corrales, E.; Coutures, C.; Dieters, S.; Dominis Prester, D.; Donatowicz, J.; Greenhill, Jg; Henderson, C.~B B.; Kubas, D.; Marquette, J.-B.; Martin, R.; Menzies, J.~W W.; Shappee, B.; Williams, A.; Wouters, D.; Collaboration, F. U. N.; Zub, M.; Planet, Collaboration; Street, R.~A A.; Horne, K.; Bramich, D.~M M.; Steele, I.~A A.; Collaboration, RoboNet; Alsubai, K.~A A.; Bozza, V.; Browne, P.; Burgdorf, M.~J J.; Calchi Novati, S.; Dodds, P.; Finet, François; Gerner, T.; Hardis, S.; Harpsoe, K.; Hessman, F. V.; Hinse, T.~C C.; Hundertmark, M.; Jorgensen, U.~G G.; Kains, N.; Kerins, Eamonn; Liebig, C.; Mancini, L.; Mathiasen, M.; Penny, M.~T T.; Proft, S.; Collaboration, M. O. A.; Rahvar, S.; Ricci, Davide; Sahu, K.~C C.; Scarpetta, G.; Schafer, S.; Schonebeck, F.; Wambsgans, J.; MiNdstep Consortium, The; Snodgrass, C.; Southworth, J.; Surdej, Jean; Wambsganss, J.

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American Astronomical Society, Astrophysical Journal, 1(769), p. 77, 2013

DOI: 10.1088/0004-637x/769/1/77

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MOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection

Journal article published in 2013 by J.~C C. Yee, L.-W. Hung, I.~A A. Bond, W. Allen, L.~A.~G A. G. Monard, M.~D D. Albrow, P. Fouque, M. Dominik, Y. Tsapras, A. Udalski, A. Gould, R. Zellem, M. Bos, G.~W W. Christie, D.~L L. Depoy and other authors.

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Abstract

We analyze MOA-2010-BLG-311, a high magnification (A max > 600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a point lens and a two-body lens model and find that the two-body lens model is a better fit but with only Δχ 2 ~ 80. The preferred mass ratio between the lens star and its companion is q = 10 -3.7 ± 0.1 , placing the candidate companion in the planetary regime. Despite the formal significance of the planet, we show that because of systematics in the data the evidence for a planetary companion to the lens is too tenuous to claim a secure detection. When combined with analyses of other high-magnification events, this event helps empirically define the threshold for reliable planet detection in high-magnification events, which remains an open question. ; DOI: 10.1088/0004-637X/769/1/77; eprintid: arXiv:1210.6041

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MOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection

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