{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2005:G6K7QKMOCY57QM7VVHCKTHWOAK","short_pith_number":"pith:G6K7QKMO","canonical_record":{"source":{"id":"astro-ph/0502363","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-02-17T21:32:06Z","cross_cats_sorted":[],"title_canon_sha256":"f69188cd33cedabdd582f42cf1baa01faa22a7a77ab270ab3b24d1adf6520d91","abstract_canon_sha256":"95a22c89a36d4929949142c94e2b7085e4d1dbde73b7c6159e601abe72304f3a"},"schema_version":"1.0"},"canonical_sha256":"3795f8298e163bf833f5a9c4a99ece02b9dee1b1ae0afdc99ed032dfe218be9a","source":{"kind":"arxiv","id":"astro-ph/0502363","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2005:G6K7QKMOCY57QM7VVHCKTHWOAK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0502363","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2005-02-17T21:32:06Z","cross_cats_sorted":[],"title_canon_sha256":"f69188cd33cedabdd582f42cf1baa01faa22a7a77ab270ab3b24d1adf6520d91","abstract_canon_sha256":"95a22c89a36d4929949142c94e2b7085e4d1dbde73b7c6159e601abe72304f3a"},"schema_version":"1.0"},"canonical_sha256":"3795f8298e163bf833f5a9c4a99ece02b9dee1b1ae0afdc99ed032dfe218be9a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:36:30.223794Z","signature_b64":"1pEMlnIjzrEMZ35z/cNhmKPAhRv/3JnoFMyTJSyZSDPA+xKA4rQ6sKvkbMNyz+4QwkuXVLhcf06l4m723cS9CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3795f8298e163bf833f5a9c4a99ece02b9dee1b1ae0afdc99ed032dfe218be9a","last_reissued_at":"2026-05-18T04:36:30.223397Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:36:30.223397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0502363","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:36:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g6n6whcAXF+QQSk56iYEii1QdaHd3Y4ES9KaLEx1db5kRe3CYdXJBKSqgooVurSjt6F7aM6B7ekCl9KuwUh6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T15:41:44.340423Z"},"content_sha256":"641aa90b7f2c2bf8595eaf923c6fef64455124f9199dab6f7f56cf150f7f839d","schema_version":"1.0","event_id":"sha256:641aa90b7f2c2bf8595eaf923c6fef64455124f9199dab6f7f56cf150f7f839d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2005:G6K7QKMOCY57QM7VVHCKTHWOAK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE-II","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","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","submitted_at":"2005-02-17T21:32:06Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0502363","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:36:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N5Xru9l9HRwaWvsDU+eiMS2xUMuz9Ifxg2Lsluc9pXe2G51vmXkJcAAbDUuWlgkMAtU34rGvrYa6VdE2crsLDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T15:41:44.340781Z"},"content_sha256":"c6c111dacc258aca96bc79574abc3b3b1122290e46143569e309eb6661b6f393","schema_version":"1.0","event_id":"sha256:c6c111dacc258aca96bc79574abc3b3b1122290e46143569e309eb6661b6f393"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/bundle.json","state_url":"https://pith.science/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T15:41:44Z","links":{"resolver":"https://pith.science/pith/G6K7QKMOCY57QM7VVHCKTHWOAK","bundle":"https://pith.science/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/bundle.json","state":"https://pith.science/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G6K7QKMOCY57QM7VVHCKTHWOAK/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XhEPTj4daIXDSmRiFF077Sx1dapHcc6HZr9TLYY+dy94HDOPKpO0Dn0sU1CduZ1CyE1KoJCAFJyvU7dZNCVnCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T15:41:44.342667Z","bundle_sha256":"0b7da067d3d4a68e65d6bee4481dd870da9cc32b92c40acf4b9d9cb0765d0296"}}