{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:Y75MY47MA6SI235RCTYXW7GLB2","short_pith_number":"pith:Y75MY47M","canonical_record":{"source":{"id":"1408.7028","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-08-29T14:18:46Z","cross_cats_sorted":[],"title_canon_sha256":"8390988190aebf12ee09ecd7cfee1b424f139702ed82fed3be6d210d392f0d60","abstract_canon_sha256":"bb742a8ca70bf7e6d109952c76e7ee096a3ab064214d4d689c7461f9bb2f18ac"},"schema_version":"1.0"},"canonical_sha256":"c7facc73ec07a48d6fb114f17b7ccb0e81cf08c499908829d78c7a5a00fd0220","source":{"kind":"arxiv","id":"1408.7028","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.7028","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"arxiv_version","alias_value":"1408.7028v1","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.7028","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"pith_short_12","alias_value":"Y75MY47MA6SI","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y75MY47MA6SI235R","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y75MY47M","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:Y75MY47MA6SI235RCTYXW7GLB2","target":"record","payload":{"canonical_record":{"source":{"id":"1408.7028","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-08-29T14:18:46Z","cross_cats_sorted":[],"title_canon_sha256":"8390988190aebf12ee09ecd7cfee1b424f139702ed82fed3be6d210d392f0d60","abstract_canon_sha256":"bb742a8ca70bf7e6d109952c76e7ee096a3ab064214d4d689c7461f9bb2f18ac"},"schema_version":"1.0"},"canonical_sha256":"c7facc73ec07a48d6fb114f17b7ccb0e81cf08c499908829d78c7a5a00fd0220","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:11.845883Z","signature_b64":"E4gIzmQXn1r0o1+AmGCnSO9IlxXAzoG3BQAtJkzmKPME5VVG4YQGJ3dFusYonMu7RU5tLqH5v0sGUXyrASlSAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c7facc73ec07a48d6fb114f17b7ccb0e81cf08c499908829d78c7a5a00fd0220","last_reissued_at":"2026-05-18T01:42:11.845359Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:11.845359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.7028","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:42:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kcHWnoLtwFAOb8Q6/SPlrjBS7AbcQhU4CytLGMbYvDp7roBXy+kn9o7rMGfcDNKnlqVxvvoasHwYQ92c6B4lDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:33:21.998707Z"},"content_sha256":"9ec4b505169206ec9627c61c32929e821a5f96934c4cc3f662daf407b12508b2","schema_version":"1.0","event_id":"sha256:9ec4b505169206ec9627c61c32929e821a5f96934c4cc3f662daf407b12508b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:Y75MY47MA6SI235RCTYXW7GLB2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The spin of the black hole 4U 1543-47","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"J. M. Miller (University of Michigan), W. R. Morningstar","submitted_at":"2014-08-29T14:18:46Z","abstract_excerpt":"We present a new analysis of Rossi X-ray Timing Explorer observations of the 2002 outburst of the transient X-ray nova 4U 1543-47. We focus on observations in the High/Soft state, and attempt to measure the spin of the black hole by simultaneously fitting the thermal disk continuum and by modeling the broadened iron k-shell emission lines and additional blurred reflection features. Previous works have found that use of these methods individually returns contradictory values for the dimensionless spin parameter a* =cJ/GM^2. We find that when used in conjunction with each other, a moderate spin "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.7028","kind":"arxiv","version":1},"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":"2026-05-18T01:42:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pj+rl0UdKptKhUtWNL4WVS9bsojqc+R86KhWpqCS/rVHMczPq/3BAj37ZdlgTv4MOym5YGj+Sl4iksQd0JPjDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:33:21.999304Z"},"content_sha256":"a5c7aad1df8a89cc8aafa9e9bf7e6491859bb8e9ca4f466a1edbfaf5ab1dc31a","schema_version":"1.0","event_id":"sha256:a5c7aad1df8a89cc8aafa9e9bf7e6491859bb8e9ca4f466a1edbfaf5ab1dc31a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y75MY47MA6SI235RCTYXW7GLB2/bundle.json","state_url":"https://pith.science/pith/Y75MY47MA6SI235RCTYXW7GLB2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y75MY47MA6SI235RCTYXW7GLB2/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":"2026-05-26T16:33:22Z","links":{"resolver":"https://pith.science/pith/Y75MY47MA6SI235RCTYXW7GLB2","bundle":"https://pith.science/pith/Y75MY47MA6SI235RCTYXW7GLB2/bundle.json","state":"https://pith.science/pith/Y75MY47MA6SI235RCTYXW7GLB2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y75MY47MA6SI235RCTYXW7GLB2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:Y75MY47MA6SI235RCTYXW7GLB2","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":"bb742a8ca70bf7e6d109952c76e7ee096a3ab064214d4d689c7461f9bb2f18ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-08-29T14:18:46Z","title_canon_sha256":"8390988190aebf12ee09ecd7cfee1b424f139702ed82fed3be6d210d392f0d60"},"schema_version":"1.0","source":{"id":"1408.7028","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.7028","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"arxiv_version","alias_value":"1408.7028v1","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.7028","created_at":"2026-05-18T01:42:11Z"},{"alias_kind":"pith_short_12","alias_value":"Y75MY47MA6SI","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"Y75MY47MA6SI235R","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"Y75MY47M","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:a5c7aad1df8a89cc8aafa9e9bf7e6491859bb8e9ca4f466a1edbfaf5ab1dc31a","target":"graph","created_at":"2026-05-18T01:42:11Z","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 new analysis of Rossi X-ray Timing Explorer observations of the 2002 outburst of the transient X-ray nova 4U 1543-47. We focus on observations in the High/Soft state, and attempt to measure the spin of the black hole by simultaneously fitting the thermal disk continuum and by modeling the broadened iron k-shell emission lines and additional blurred reflection features. Previous works have found that use of these methods individually returns contradictory values for the dimensionless spin parameter a* =cJ/GM^2. We find that when used in conjunction with each other, a moderate spin ","authors_text":"J. M. Miller (University of Michigan), W. R. Morningstar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-08-29T14:18:46Z","title":"The spin of the black hole 4U 1543-47"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.7028","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":"sha256:9ec4b505169206ec9627c61c32929e821a5f96934c4cc3f662daf407b12508b2","target":"record","created_at":"2026-05-18T01:42:11Z","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":"bb742a8ca70bf7e6d109952c76e7ee096a3ab064214d4d689c7461f9bb2f18ac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-08-29T14:18:46Z","title_canon_sha256":"8390988190aebf12ee09ecd7cfee1b424f139702ed82fed3be6d210d392f0d60"},"schema_version":"1.0","source":{"id":"1408.7028","kind":"arxiv","version":1}},"canonical_sha256":"c7facc73ec07a48d6fb114f17b7ccb0e81cf08c499908829d78c7a5a00fd0220","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c7facc73ec07a48d6fb114f17b7ccb0e81cf08c499908829d78c7a5a00fd0220","first_computed_at":"2026-05-18T01:42:11.845359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:11.845359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E4gIzmQXn1r0o1+AmGCnSO9IlxXAzoG3BQAtJkzmKPME5VVG4YQGJ3dFusYonMu7RU5tLqH5v0sGUXyrASlSAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:11.845883Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.7028","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ec4b505169206ec9627c61c32929e821a5f96934c4cc3f662daf407b12508b2","sha256:a5c7aad1df8a89cc8aafa9e9bf7e6491859bb8e9ca4f466a1edbfaf5ab1dc31a"],"state_sha256":"bfe703ea9e20522e56b8658abe24a313ad8565711e145e7dd23ca6ab4f69dcaf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Ao94ilhg8QmgQVbOg8F9PmweEm7lYTvKN117vYstNkXey+Kf4tO5jL14rQD2o4wNgk9VjxUNViT8pmH4BkADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:33:22.002288Z","bundle_sha256":"e76c0bdeff5b168eab3d4ed2e189be4162f8d11c881103f83477aa3121628863"}}