{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:G6K7QKMOCY57QM7VVHCKTHWOAK","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":"95a22c89a36d4929949142c94e2b7085e4d1dbde73b7c6159e601abe72304f3a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-02-17T21:32:06Z","title_canon_sha256":"f69188cd33cedabdd582f42cf1baa01faa22a7a77ab270ab3b24d1adf6520d91"},"schema_version":"1.0","source":{"id":"astro-ph/0502363","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0502363","created_at":"2026-05-18T04:36:30Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0502363v4","created_at":"2026-05-18T04:36:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0502363","created_at":"2026-05-18T04:36:30Z"},{"alias_kind":"pith_short_12","alias_value":"G6K7QKMOCY57","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_16","alias_value":"G6K7QKMOCY57QM7V","created_at":"2026-05-18T12:25:53Z"},{"alias_kind":"pith_short_8","alias_value":"G6K7QKMO","created_at":"2026-05-18T12:25:53Z"}],"graph_snapshots":[{"event_id":"sha256:c6c111dacc258aca96bc79574abc3b3b1122290e46143569e309eb6661b6f393","target":"graph","created_at":"2026-05-18T04:36:30Z","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"},"paper":{"abstract_excerpt":"We present a measurement of the microlensing optical depth toward the Galactic Bulge based on 4 years of the OGLE-II survey using Red Clump Giant (RCG). Using 32 events we find tau=2.55_{-0.46}^{+0.57}* 10^{-6} at (l,b)=(1.16, -2.75). Taking into account the measured gradient along the Galactic latitude b, tau = [ (4.48+/- 2.37) + (0.78+/- 0.84)* b]* 10^{-6}, this value is consistent with previous measurements using RCG sources and recent theoretical predictions. We determine the microlensing parameters and select events using a model light curve with the flux blending. We find that ~38% of th","authors_text":"A. Udalski, G. Pietrzynski, I. Soszy nski, K. Zebrun, L. Wyrzykowski & B. Paczynski, M. Kubiak, M. Szymanski, O.Szewczyk, P. R. Wozniak, T. Sumi","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-02-17T21:32:06Z","title":"Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE-II"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0502363","kind":"arxiv","version":4},"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":"sha256:641aa90b7f2c2bf8595eaf923c6fef64455124f9199dab6f7f56cf150f7f839d","target":"record","created_at":"2026-05-18T04:36:30Z","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":"95a22c89a36d4929949142c94e2b7085e4d1dbde73b7c6159e601abe72304f3a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2005-02-17T21:32:06Z","title_canon_sha256":"f69188cd33cedabdd582f42cf1baa01faa22a7a77ab270ab3b24d1adf6520d91"},"schema_version":"1.0","source":{"id":"astro-ph/0502363","kind":"arxiv","version":4}},"canonical_sha256":"3795f8298e163bf833f5a9c4a99ece02b9dee1b1ae0afdc99ed032dfe218be9a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3795f8298e163bf833f5a9c4a99ece02b9dee1b1ae0afdc99ed032dfe218be9a","first_computed_at":"2026-05-18T04:36:30.223397Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:30.223397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1pEMlnIjzrEMZ35z/cNhmKPAhRv/3JnoFMyTJSyZSDPA+xKA4rQ6sKvkbMNyz+4QwkuXVLhcf06l4m723cS9CA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:30.223794Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0502363","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:641aa90b7f2c2bf8595eaf923c6fef64455124f9199dab6f7f56cf150f7f839d","sha256:c6c111dacc258aca96bc79574abc3b3b1122290e46143569e309eb6661b6f393"],"state_sha256":"6fe121031d68f610b26f4c6c39a0d454d281b9cad41a90efe71951c9ec8ab06c"}