{"paper":{"title":"A short-period binary OGLE-BLG-ELL-006503 showing slow variations in brightness","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Eclipse timings in OGLE-BLG-ELL-006503 show an orbital period change on a two-million-year timescale.","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"S. M. Rucinski","submitted_at":"2026-04-29T14:17:08Z","abstract_excerpt":"Analysis of 28 years of OGLE project data for the 0.404 day period binary OGLE BLG ELL-006503 (V1231 Sco) shows a superposition of tidal-interaction variations of about 0.07 magnitude in the I-band onto a time-scale 5-10 year, 0.15-0.17 magnitude brightness drift. Seasonal light-curves suggest that this long-term variability is driven by large photospheric spots (approx 0.3 stellar radii) that exhibit a tendency to orient themselves relative to the tidal interaction line. The eclipse time O-C residuals reveal an orbital period change characterized by a timescale of approximately 2x10^6 years, "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The eclipse time O-C residuals reveal an orbital period change characterized by a timescale of approximately 2x10^6 years, suggesting a mild mass redistribution, potentially linked to global magnetic fields reconfiguration.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Seasonal light-curves suggest that this long-term variability is driven by large photospheric spots (approx 0.3 stellar radii) that exhibit a tendency to orient themselves relative to the tidal interaction line.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"28-year OGLE observations of short-period binary OGLE-BLG-ELL-006503 show tidal variations plus long-term spot-driven brightness drifts and orbital period changes suggesting mild mass redistribution.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Eclipse timings in OGLE-BLG-ELL-006503 show an orbital period change on a two-million-year timescale.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"c29512a1e1bf463b17c23b10826c2336af70af0d29b1b7144b6166e1f29fee10"},"source":{"id":"2604.26710","kind":"arxiv","version":2},"verdict":{"id":"eb77ce54-993c-40f5-837d-a7a811f2f843","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-07T11:33:45.638349Z","strongest_claim":"The eclipse time O-C residuals reveal an orbital period change characterized by a timescale of approximately 2x10^6 years, suggesting a mild mass redistribution, potentially linked to global magnetic fields reconfiguration.","one_line_summary":"28-year OGLE observations of short-period binary OGLE-BLG-ELL-006503 show tidal variations plus long-term spot-driven brightness drifts and orbital period changes suggesting mild mass redistribution.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Seasonal light-curves suggest that this long-term variability is driven by large photospheric spots (approx 0.3 stellar radii) that exhibit a tendency to orient themselves relative to the tidal interaction line.","pith_extraction_headline":"Eclipse timings in OGLE-BLG-ELL-006503 show an orbital period change on a two-million-year timescale."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.26710/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-20T23:43:43.438088Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T19:55:15.393246Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"0f7b40f1cf0c35ea4901b9fabe4362581252b30e3a13b3c6d1478d09190443f5"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}