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2009ApJ...703.2082Y - Astrophys. J., 703, 2082-2090 (2009/October-1)

Extreme magnification microlensing event OGLE-2008-BLG-279: strong limits on planetary companions to the lens star.

YEE J.C., UDALSKI A., SUMI T., DONG S., KOZLOWSKI S., BIRD J.C., COLE A., HIGGINS D., McCORMICK J., MONARD L.A.G., POLISHOOK D., SHPORER A., SPECTOR O., SZYMANSKI M.K., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I., SZEWCZYK O., ULACZYK K., WYRZYKOWSKI L., POLESKI R. (The OGLE Collaboration), ALLEN W., BOS M., CHRISTIE G.W., DEPOY D.L., EASTMAN J.D., GAUDI B.S., GOULD A., HAN C., KASPI S., LEE C.-U., MALLIA F., MAURY A., MAOZ D., NATUSCH T., PARK B.-G., POGGE R.W., SANTALLO R. (The {mu}FUN Collaboration), ABE F., BOND I.A., FUKUI A., FURUSAWA K., HEARNSHAW J.B., HOSAKA S., ITOW Y., KAMIYA K., KORPELA A.V., KILMARTIN P.M., LIN W., LING C.H., MAKITA S., MASUDA K., MATSUBARA Y., MIYAKE N., MURAKI Y., NAGAYA M., NISHIMOTO K., OHNISHI K., PERROTT Y.C., RATTENBURY N.J., SAKO T., SAITO T., SKULJAN L., SULLIVAN D.J., SWEATMAN W.L., TRISTRAM P.J., YOCK P.C.M. (The MOA Collaboration), ALBROW M.D., BATISTA V., FOUQUE P., BEAULIEU J.-P., BENNETT D.P., CASSAN A., COMPARAT J., COUTURES C., DIETERS S., GREENHILL J., HORNE K., KAINS N., KUBAS D., MARTIN R., MENZIES J., WAMBSGANSS J., WILLIAMS A., ZUB M. (The PLANET Collaboration)

Abstract (from CDS):

We analyze the extreme high-magnification microlensing event OGLE-2008-BLG-279, which peaked at a maximum magnification of A ∼ 1600 on 2008 May 30. The peak of this event exhibits both finite-source effects and terrestrial parallax, from which we determine the mass of the lens, Ml= 0.64±0.10 M☉, and its distance, Dl= 4.0±0.6 kpc. We rule out Jupiter-mass planetary companions to the lens star for projected separations in the range 0.5-20 AU. More generally, we find that this event was sensitive to planets with masses as small as with projected separations near the Einstein ring (∼3 AU).

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Journal keyword(s): gravitational lensing - planetary systems - planetary systems: formation

Simbad objects: 4

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