Yee, JC and Udalski, A and Sumi, T and Dong, S and Kozlowski, S and Bird, JC and Cole, AA and Higgins, D and McCormick, J and Monard, LAG and Polishook, D and Shporer, A and Spector, O and Szymanski, MK and Kubiak, M and Pietrzynski, G and Soszynski, I and Szewczyk, O and Ulaczyk, K and Wyrzykowski, L and Poleski, R and Allen, W and Bos, M and Christie, GW and DePoy, DL and Eastman, JD and Gaudi, BS and Gould, A and Han, C and Kaspi, S and Lee, CU and Mallia, F and Maury, A and Maoz, D and Natusch, T and Park, BG and Pogge, RW and Santallo, R and Abe, F and Bond, IA and Fukui, A and Furusawa, K and Hearnshaw, JB and Hosaka, S and Itow, Y and Kamiya, K and Korpela, AV and Kilmartin, PM and Lin, W and Ling, CH and Makita, S and Masuda, K and Matsubara, Y and Miyake, N and Muraki, Y and Nagaya, M and Nishimoto, K and Ohnishi, K and Perrott, YC and Rattenbury, NJ and Sako, T and Saito, T and Skuljan, L and Sullivan, DJ and Sweatman, WL and Tristram, PJ and Yock, PCM and Albrow, MD and Batista, V and Fouque, P and Beaulieu, JP and Bennett, DP and Cassan, A and Comparat, J and Coutures, C and Dieters, S and Greenhill, JG and Horne, K and Kains, N and Kubas, D and Martin, R and Menzies, J and Wambsganss, J and Williams, A and Zub, M, Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Stars, The Astrophysical Journal: An International Review of Astronomy and Astronomical Physics, 703, (2) pp. 2082-2090. ISSN 0004-637X (2009) [Refereed Article]
Copyright © 2009 The American Astronomical Society
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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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