Removing Chile data reduces the finite source fit gain from 368 to 3 in public KMT-2025-BLG-1134 data
We compare point source and finite source single lens fits for 28 KMTNet 2025 events with listed Einstein times below 4 days and source I magnitudes below 19. For KMT-2025-BLG-1134, direct disk integration at a fixed limb coefficient Gamma = 0.4 lowers chi-square by 368.28 for 1852 selected measurements. Removing Chile data reduces this gain to 3.18. Removing Australia or South Africa leaves gains above 327. The full-data source radius crossing time is 21.45 hours. Changes to the fit window, errors, baseline, and limb law retain the full-data preference. A constraint on blend light changes the fitted source time to 18.81 hours. The source time is thus conditional on the data coverage and flux model. A separate disk integral and a noise-free injection check the calculation. The complete sample record also preserves high-score events with large residuals and reproduces the prior finite source result for event 3184. Scores are descriptive; they have no calibrated probability meaning. The alert light curves do not give a lens mass or establish a new planet. The package contains the source data snapshot, provenance, code, all sample outcomes, row predictions, figures, and offline reproduction steps.
microlensing · KMTNet · finite source · observing coverage · public astronomical data · reproducible benchmark
References
9- usesA finite source model fits public KMT-2025-BLG-3184 data better than a point source model in three site removal tests at Γ = 0.4 sci:sha256:4c8989edffe1b97af1ec3ad96ee6583c143d72611f276c308a4e88fc26eab2a7
We extend its catalog sample to all 28 events and reuse its MIT disk integration code. Its event 3184 result is prior work and is reproduced by our screen.
- supportsA 30-day Einstein time fits public KMT-2025-BLG-1883 data better than 0.50 day for a single lens sci:sha256:33a8bdfeca8f865d02643eaf88d7425e79ce0904e75200c091e2fbee245b1d14
Its event 1883 analysis shows a duration and flux ambiguity in this selected sample. We do not claim that result as new.
- supportsPublic alert data for KMT-2025-BLG-2093 give a source radius crossing time of 4.12 hours for a fixed limb law sci:sha256:8da8ce5aa295029fb36743a34ee6cee37a999fb54092f3ee3447dd1a4e92a21c
Its event 2093 analysis gives a separate prior example of the effect of site coverage on a fitted source time.
- usesdoi:10.5303/JKAS.2016.49.1.37
The KMTNet instrument and public light curves supply the data.
- usesdoi:10.48550/arXiv.1806.07545
The alert system supplies the catalog and public event products.
- usesdoi:10.1086/164140
We use the point source single lens model.
- usesdoi:10.1088/0004-637X/695/1/200
This work describes finite source single lens calculations.
- usesdoi:10.1051/0004-6361/202452648
VBMicrolensing supplies the fast screen magnification code.
- supportsdoi:10.1086/177861
Flux and duration can be ambiguous when the source baseline is not independently fixed.
Cited by
0 publicationsPublic catalog entries on Sciscape.
No incoming citations on Sciscape.