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Zhu, Wei; Udalski, A.; Huang, C. X.; Novati, S. Calchi; Sumi, T.; Poleski, R.; Skowron, J.; Mróz, P.; Szyma ski, M. K.; Soszy ski, I.; Pietrukowicz, P.; Koz owski, S.; Ulaczyk, K.; Pawlak, M.; Beichman, C.; Bryden, G.; Carey, S.; Gaudi, B. S.; Gould, A.; Henderson, C. B.; Shvartzvald, Y.; Yee, J. C.; Bond, I. A.; Bennett, D. P.; Suzuki, D.; Rattenbury, N. J.; Koshimoto, N.; Abe, F.; Asakura, Y.; Barry, R. K.; Bhattacharya, A.; Donachie, M.; Evans, P.; Fukui, A.; Hirao, Y.; Itow, Y.; Kawasaki, K.; Li, M. C. A.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Miyazaki, S.; Munakata, H.; Muraki, Y.; Nagakane, M.; Ohnishi, K.; Ranc, C.; Saito, To; Sharan, A.; Sullivan, D. J.; Tristram, P. J.; Yamada, T.; Yonehara, A.
Astrophysical journal. Letters, 11/2017, Letnik: 849, Številka: 2Journal Article
We present the result of microlensing event MOA-2016-BLG-290, which received observations from the two-wheel Kepler (K2), Spitzer, as well as ground-based observatories. A joint analysis of data from K2 and the ground leads to two degenerate solutions of the lens mass and distance. This degeneracy is effectively broken once the (partial) Spitzer light curve is included. Altogether, the lens is found to be an extremely low-mass star or brown dwarf ( ) located in the Galactic bulge ( kpc). MOA-2016-BLG-290 is the first microlensing event for which we have signals from three well-separated (∼1 au) locations. It demonstrates the power of two-satellite microlensing experiment in reducing the ambiguity of lens properties, as pointed out independently by S. Refsdal and A. Gould several decades ago.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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