Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Stars

Yee, JC; Udalski, A; Sumi, T; Dong, S; Kozlowski, S; Bird, JC; Cole, Andrew; Higgins, D; McCormick, J; Monard, LAG; Polishook, D; Shporer, A; Spector, O; Szymanski, MK; Kubiak, M; Pietrzynski, G; Soszynski, I; Szewczyk, O; Ulaczyk, K; Wyrzykowski, L; Poleski, R; Allen, W; Bos, M; Christie, GW; DePoy, DL; Eastman, JD; Gaudi, BS; Gould, A; Han, C; Kaspi, S; Lee, CU; Mallia, F; Maury, A; Maoz, D; Natusch, T; Park, BG; Pogge, RW; Santallo, R; Abe, F; Bond, IA; Fukui, A; Furusawa, K; Hearnshaw, JB; Hosaka, S; Itow, Y; Kamiya, K; Korpela, AV; Kilmartin, PM; Lin, W; Ling, CH; Makita, S; Masuda, K; Matsubara, Y; Miyake, N; Muraki, Y; Nagaya, M; Nishimoto, K; Ohnishi, K; Perrott, YC; Rattenbury, NJ; Sako, T; Saito, T; Skuljan, L; Sullivan, DJ; Sweatman, WL; Tristram, PJ; Yock, PCM; Albrow, MD; Batista, V; Fouque, P; Beaulieu, Jean-Philippe; Bennett, DP; Cassan, A; Comparat, J; Coutures, C; Dieters, S; Greenhill, JG; Horne, K; Kains, N; Kubas, D; Martin, R; Menzies, J; Wambsganss, J; Williams, A; Zub, M

Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Stars

https://hdl.handle.net/102.100.100/587207

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posted on 2025-01-15, 00:59 authored by JC Yee, A Udalski, T Sumi, S Dong, S Kozlowski, JC Bird, Andrew ColeAndrew Cole, D Higgins, J McCormick, LAG Monard, D Polishook, A Shporer, O Spector, MK Szymanski, M Kubiak, G Pietrzynski, I Soszynski, O Szewczyk, K Ulaczyk, L Wyrzykowski, R Poleski, W Allen, M Bos, GW Christie, DL DePoy, JD Eastman, BS Gaudi, A Gould, C Han, S Kaspi, CU Lee, F Mallia, A Maury, D Maoz, T Natusch, BG Park, RW Pogge, R Santallo, F Abe, IA Bond, A Fukui, K Furusawa, JB Hearnshaw, S Hosaka, Y Itow, K Kamiya, AV Korpela, PM Kilmartin, W Lin, CH Ling, S Makita, K Masuda, Y Matsubara, N Miyake, Y Muraki, M Nagaya, K Nishimoto, K Ohnishi, YC Perrott, NJ Rattenbury, T Sako, T Saito, L Skuljan, DJ Sullivan, WL Sweatman, PJ Tristram, PCM Yock, MD Albrow, V Batista, P Fouque, Jean-Philippe BeaulieuJean-Philippe Beaulieu, DP Bennett, A Cassan, J Comparat, C Coutures, S Dieters, JG Greenhill, K Horne, N Kains, D Kubas, R Martin, J Menzies, J Wambsganss, A Williams, M Zub

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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The Astrophysical Journal: An International Review of Astronomy and Astronomical Physics

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703

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2082-2090

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0004-637X

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Univ Chicago Press

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Extreme Magnification Microlensing Event OGLE-2008-BLG-279: Strong Limits on Planetary Companions to the Lens Stars

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