{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:2ACUX2JV6HKI7PFLESPNANRYQ3","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f33d0820b62777ce33c3d64f14c4ea8f5feee05862665b2033add43fd38b9cb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-09T17:43:34Z","title_canon_sha256":"f578fa8311ec93b518528da21bc0baa5f5353a5651b5d3b61083fbbaed45fd8b"},"schema_version":"1.0","source":{"id":"0901.1285","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.1285","created_at":"2026-07-04T17:14:02Z"},{"alias_kind":"arxiv_version","alias_value":"0901.1285v1","created_at":"2026-07-04T17:14:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.1285","created_at":"2026-07-04T17:14:02Z"},{"alias_kind":"pith_short_12","alias_value":"2ACUX2JV6HKI","created_at":"2026-07-04T17:14:02Z"},{"alias_kind":"pith_short_16","alias_value":"2ACUX2JV6HKI7PFL","created_at":"2026-07-04T17:14:02Z"},{"alias_kind":"pith_short_8","alias_value":"2ACUX2JV","created_at":"2026-07-04T17:14:02Z"}],"graph_snapshots":[{"event_id":"sha256:5922506dee239dcbfce3f52669e99b4736db5629aac8e1fe1df1c464fc62fc94","target":"graph","created_at":"2026-07-04T17:14:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0901.1285/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parameterisation proposed and detailed in Cassan (2008). As an illustration of our methodology, we present an analysis of OGLE-2007-BLG-472, a double-peaked Galactic microlensing event with a source crossing the whole caustic structure in less than three days. In order to identify all possible models we conduct an extensive search of the parameter space, followed by a refinement of the parameters with a Markov Chain-Monte Carlo algorithm. We find a number of low-chi2 regions in the p","authors_text":"A. Cassan, A. Udalski, A. Williams, Ch. Coutures, C. Snodgrass, C. Vinter, D. Dominis Prester, D. Kubas, D.M. Bramich, D.P. Bennett, G. Pietrzynski, I. Soszynski, I. Steele, J.A.R. Caldwell, J.B. Marquette, J. Donatowicz, J. Greenhill, J. Menzies, J.-P. Beaulieu, J. Wambsganss, K.C. Sahu, K.H. Cook, K. Horne, K.R. Pollard, K. Ulaczyk, L. Wyrzykowski, M. Bode, M. Burgdorf, M.D. Albrow, M. Dominik, M.K. Szymanski, M. Kubiak, M. Zub, N. Kains, N. Rattenbury, O. Szewczyk, P. Fouque, R. Martin, S. Brillant, S. Dieters, S. Kane, T. Anguita, U.G. Jorgensen, V. Batista, Y. Tsapras","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-09T17:43:34Z","title":"A systematic fitting scheme for caustic-crossing microlensing events"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.1285","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c52dd6bcc1f55d13315fa3fcd538e48e78bf2cdbbf7a2bd666f3e079b59e940f","target":"record","created_at":"2026-07-04T17:14:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f33d0820b62777ce33c3d64f14c4ea8f5feee05862665b2033add43fd38b9cb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-01-09T17:43:34Z","title_canon_sha256":"f578fa8311ec93b518528da21bc0baa5f5353a5651b5d3b61083fbbaed45fd8b"},"schema_version":"1.0","source":{"id":"0901.1285","kind":"arxiv","version":1}},"canonical_sha256":"d0054be935f1d48fbcab249ed0363886c52ef01b6e60c7213cef62eda227c882","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0054be935f1d48fbcab249ed0363886c52ef01b6e60c7213cef62eda227c882","first_computed_at":"2026-07-04T17:14:02.234543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:02.234543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LDtPsh33r36IZVkkRx9wAjLdAWd/J7FGBn55mY2tFWtOT9PCihPKwW7VEZEZa4D7oyKX0MaFc0rjfYuYDT2aBA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:02.234954Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.1285","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c52dd6bcc1f55d13315fa3fcd538e48e78bf2cdbbf7a2bd666f3e079b59e940f","sha256:5922506dee239dcbfce3f52669e99b4736db5629aac8e1fe1df1c464fc62fc94"],"state_sha256":"73f70d2571d1c0a73abab1b37ef5f3ebaffcac24d24c55de1933a9b8d4d8e639"}