{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:U7BFWMSQQQ7NEUHPNYS5UDZM6K","short_pith_number":"pith:U7BFWMSQ","canonical_record":{"source":{"id":"0809.0866","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-04T18:49:46Z","cross_cats_sorted":[],"title_canon_sha256":"03ae15872b0b1b1e0636fb6309a945c85371ed70f4370d8e693c064ce8102f27","abstract_canon_sha256":"e029f12a37e7a922997802d7866aa7fcb2a3417524071f90e4a8730316b8cff8"},"schema_version":"1.0"},"canonical_sha256":"a7c25b3250843ed250ef6e25da0f2cf2b684729a06944d6218b08107a510f2a0","source":{"kind":"arxiv","id":"0809.0866","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.0866","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"arxiv_version","alias_value":"0809.0866v2","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.0866","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"pith_short_12","alias_value":"U7BFWMSQQQ7N","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"U7BFWMSQQQ7NEUHP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"U7BFWMSQ","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:U7BFWMSQQQ7NEUHPNYS5UDZM6K","target":"record","payload":{"canonical_record":{"source":{"id":"0809.0866","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-04T18:49:46Z","cross_cats_sorted":[],"title_canon_sha256":"03ae15872b0b1b1e0636fb6309a945c85371ed70f4370d8e693c064ce8102f27","abstract_canon_sha256":"e029f12a37e7a922997802d7866aa7fcb2a3417524071f90e4a8730316b8cff8"},"schema_version":"1.0"},"canonical_sha256":"a7c25b3250843ed250ef6e25da0f2cf2b684729a06944d6218b08107a510f2a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:32.884056Z","signature_b64":"lnhvRo2WONdc+5wxvW2TbyQO9K47M7/D5KZa6asPRZqEhQ1TH6LcXroSgWOtSNI40eRaYUFxiDCKdsgAu9PEBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7c25b3250843ed250ef6e25da0f2cf2b684729a06944d6218b08107a510f2a0","last_reissued_at":"2026-05-18T04:29:32.883696Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:32.883696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0809.0866","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:29:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xDMBxAqq5fmMB6QTyO9r+dn7u6E98PJ56Jg8niKTqzVXhvT9HPj+qK5lB9p5VSJ4ZJSmbURedLzQsLzKuGhlAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T08:31:41.357696Z"},"content_sha256":"40b50a848ad5ba3a1fb3bfe3516daa0a54f7fb67237ef2f5844ad0f238638bdf","schema_version":"1.0","event_id":"sha256:40b50a848ad5ba3a1fb3bfe3516daa0a54f7fb67237ef2f5844ad0f238638bdf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:U7BFWMSQQQ7NEUHPNYS5UDZM6K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inferring the Inclination of a Black Hole Accretion Disk from Observations of its Polarized Continuum Radiation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jeffrey E. McClintock, Li-Xin Li, Ramesh Narayan","submitted_at":"2008-09-04T18:49:46Z","abstract_excerpt":"Spin parameters of stellar-mass black holes in X-ray binaries are currently being estimated by fitting the X-ray continuum spectra of their accretion disk emission. For this method, it is necessary to know the inclination of the X-ray-producing inner region of the disk. Since the inner disk is expected to be oriented perpendicular to the spin axis of the hole, the usual practice is to assume that the black hole spin is aligned with the orbital angular momentum vector of the binary, and to estimate the inclination of the latter from ellipsoidal modulations in the light curve of the secondary st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.0866","kind":"arxiv","version":2},"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":"2026-05-18T04:29:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9BngudVaNqI41gpwKOenRTjfQ3eqNek2diugffntA/0bVVYvWe/h5kdD37byuYPPRdoKZ1+FeSc4/8D5+g9TAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T08:31:41.358033Z"},"content_sha256":"c7135413b228adedc71ba39677cadbf3e1c2b4c6cbe6f7bb3d9a0e318d75bee8","schema_version":"1.0","event_id":"sha256:c7135413b228adedc71ba39677cadbf3e1c2b4c6cbe6f7bb3d9a0e318d75bee8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/bundle.json","state_url":"https://pith.science/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/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":"2026-06-01T08:31:41Z","links":{"resolver":"https://pith.science/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K","bundle":"https://pith.science/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/bundle.json","state":"https://pith.science/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U7BFWMSQQQ7NEUHPNYS5UDZM6K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:U7BFWMSQQQ7NEUHPNYS5UDZM6K","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":"e029f12a37e7a922997802d7866aa7fcb2a3417524071f90e4a8730316b8cff8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-04T18:49:46Z","title_canon_sha256":"03ae15872b0b1b1e0636fb6309a945c85371ed70f4370d8e693c064ce8102f27"},"schema_version":"1.0","source":{"id":"0809.0866","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.0866","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"arxiv_version","alias_value":"0809.0866v2","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.0866","created_at":"2026-05-18T04:29:32Z"},{"alias_kind":"pith_short_12","alias_value":"U7BFWMSQQQ7N","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"U7BFWMSQQQ7NEUHP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"U7BFWMSQ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:c7135413b228adedc71ba39677cadbf3e1c2b4c6cbe6f7bb3d9a0e318d75bee8","target":"graph","created_at":"2026-05-18T04:29:32Z","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":"Spin parameters of stellar-mass black holes in X-ray binaries are currently being estimated by fitting the X-ray continuum spectra of their accretion disk emission. For this method, it is necessary to know the inclination of the X-ray-producing inner region of the disk. Since the inner disk is expected to be oriented perpendicular to the spin axis of the hole, the usual practice is to assume that the black hole spin is aligned with the orbital angular momentum vector of the binary, and to estimate the inclination of the latter from ellipsoidal modulations in the light curve of the secondary st","authors_text":"Jeffrey E. McClintock, Li-Xin Li, Ramesh Narayan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-04T18:49:46Z","title":"Inferring the Inclination of a Black Hole Accretion Disk from Observations of its Polarized Continuum Radiation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.0866","kind":"arxiv","version":2},"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":"sha256:40b50a848ad5ba3a1fb3bfe3516daa0a54f7fb67237ef2f5844ad0f238638bdf","target":"record","created_at":"2026-05-18T04:29:32Z","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":"e029f12a37e7a922997802d7866aa7fcb2a3417524071f90e4a8730316b8cff8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-04T18:49:46Z","title_canon_sha256":"03ae15872b0b1b1e0636fb6309a945c85371ed70f4370d8e693c064ce8102f27"},"schema_version":"1.0","source":{"id":"0809.0866","kind":"arxiv","version":2}},"canonical_sha256":"a7c25b3250843ed250ef6e25da0f2cf2b684729a06944d6218b08107a510f2a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7c25b3250843ed250ef6e25da0f2cf2b684729a06944d6218b08107a510f2a0","first_computed_at":"2026-05-18T04:29:32.883696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:32.883696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lnhvRo2WONdc+5wxvW2TbyQO9K47M7/D5KZa6asPRZqEhQ1TH6LcXroSgWOtSNI40eRaYUFxiDCKdsgAu9PEBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:32.884056Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.0866","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40b50a848ad5ba3a1fb3bfe3516daa0a54f7fb67237ef2f5844ad0f238638bdf","sha256:c7135413b228adedc71ba39677cadbf3e1c2b4c6cbe6f7bb3d9a0e318d75bee8"],"state_sha256":"2e9fb7b1c5f989032b468a3284613bda87aef2e6c17ff7665f3e7977009b5670"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3b5RHu+FtzCMLBnJcAsVs45v0iZ1zCkhCBI15m9HLoGuqPMqoEwIrryUQfU1z4SJs5X6jAXGA6vkbOd2p76WBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T08:31:41.359968Z","bundle_sha256":"34effb4c58bb6a53b7381983ecd749d25adeace2cbf8c1cf4a21db72707a1ab0"}}