Table 2
Comparison of χ2 statistics.
| OGLE “old” reductions | OGLE “new” reductions | MOA | |
|---|---|---|---|
| χ2/d.o.f.(1L1S) | 1170.38/842 | 1271.28/824 | 2653.70/2426 |
| χ2/d.o.f.(2L1S) | 763.55/846 | 809.79/828 | 2417.47/2430 |
| χ2/d.o.f.(1L2S) | 778.43/848 | 830.15/830 | 2413.1/2432 |
| χ2/d.o.f.(1L2S + prior (a)) | 2410.72/848 | 1928.11/830 | 3158.42/2432 |
| χ2(1L1S) − χ2(2L1S) | 406.8 | 461.5 | 236.2 |
| χ2(1L2S) − χ2(2L1S) | 14.9 | 20.4 | −4.4 |
| χ2(1L2S + prior (a))−χ2(2L1S) | 1647.2 | 1118.3 | 741 |
Notes. The table compares four microlensing models: single-lens point-source model (1L1S), binary-lens single-source (2L1S), single-lens binary-source (1L2S), and single-lens binary-source with a Gaussian prior on the ratio of sources flux, each fitted separately to OGLE and MOA observations. OGLE old reductions are based on the reference image from 2010, while OGLE new reductions are based on the reference image from 2018. (a)Gaussian prior fS,1 / fS,2 = 𝒩 ((ρ1/ρ2)2, 10).
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