Pith Number

pith:JTMJJHHB

pith:2026:JTMJJHHBQVIVMU5WO4S53GVTDR

not attested not anchored not stored refs resolved

Four-Body Gravitational Microlensing Events Involving Both a Binary Lens and a Binary Source

Andrew Gould, Andrzej Udalski, Byeong-Gon Park, Cheongho Han, Chung-Uk Lee, Doeon Kim, Dong-Jin Kim, Dong-Joo Lee, Hongjing Yang, Igor Soszy\'nski, In-Gu Shin, Jennifer C. Yee, Krzysztof A. Rybicki, Krzysztof Ulaczyk, Kyu-Ha~Hwang, Marcin Wrona, Mariusz Gromadzki, Mateusz J. Mr\'oz, Michael D. Albrow, Micha{\l} K. Szyma\'nskim Jan Skowron, Patryk Iwanek, Pawe{\l} Pietrukowicz, Przemek Mr\'oz, Rados{\l}aw Poleski, Richard W. Pogge, Sang-Mok Cha, Seung-Lee Kim, Sun-Ju Chung, Szymon Koz{\l}owski, Weicheng Zang, Yongseok Lee, Yoon-Hyun Ryu, Yossi Shvartzvald, Youn Kil Jung

Three microlensing events are best fit by four-body models with both binary lenses and binary sources.

arxiv:2605.17654 v1 · 2026-05-17 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JTMJJHHBQVIVMU5WO4S53GVTDR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

The full light-curve structures of KMT-2021-BLG-0209, KMT-2021-BLG-0901, and OGLE-2025-BLG-0356 can be described by four-body configurations involving a binary lens and a binary source, with the 2L2S models providing significantly better fits than 3L1S or 2L1S alternatives.

C2weakest assumption

That the observed weak caustic-exit residuals, late-time re-brightening, and short isolated anomaly arise specifically from additional caustic interactions with a faint secondary source rather than from unmodeled systematics, higher-order effects, or alternative multi-lens configurations.

C3one line summary

Three anomalous microlensing events are re-modeled as binary-lens binary-source (2L2S) systems that resolve prior residuals, with source stars identified as G8V/M3V, G8V/K2V, and G6V/G8V pairs and lenses inferred as low-mass binaries via Bayesian methods.

References

29 extracted · 29 resolved · 4 Pith anchors

[1] Alard, C., & Lupton, R. H. 1998, ApJ, 503, 325, doi: 10.1086/305984 1998 · doi:10.1086/305984

[2] 2010, MNRAS, 401, 2318, doi: 10.1111/j.1365-2966.2009.15845.x 2009 · doi:10.1111/j.1365-2966.2009.15098.x

[3] Alcock, C., Akerlof, C. W., Allsman, R. A., et al. 1993, Nature, 365, 621, doi: 10.1038/365621a0 1993 · doi:10.1038/365621a0

[4] 1993, Nature, 365, 623, doi: 10.1038/365623a0 1993 · doi:10.1038/365623a0

[5] C., Feltzing, S., et al 2013 · doi:10.1051/0004-6361/201220678

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:04:51.126343Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4cd8949ce185515653b67725dd9ab31c4850ed49e0215b04d7c15fbd1d946abd

Aliases

arxiv: 2605.17654 · arxiv_version: 2605.17654v1 · doi: 10.48550/arxiv.2605.17654 · pith_short_12: JTMJJHHBQVIV · pith_short_16: JTMJJHHBQVIVMU5W · pith_short_8: JTMJJHHB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/JTMJJHHBQVIVMU5WO4S53GVTDR \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 4cd8949ce185515653b67725dd9ab31c4850ed49e0215b04d7c15fbd1d946abd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c1c79a833a6dce67eba4a1d4a8b4a948dfbd3a8e46479ee69a1404407a6b889",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-05-17T21:11:56Z",
    "title_canon_sha256": "7c9167d6aaf8421661694e439c95d3c9af101f538ef04d33d4fa260c6cb69621"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17654",
    "kind": "arxiv",
    "version": 1
  }
}