{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:2I4WITADF2VC4X3FPOEYVM7WN7","short_pith_number":"pith:2I4WITAD","canonical_record":{"source":{"id":"astro-ph/0011561","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-30T21:52:27Z","cross_cats_sorted":[],"title_canon_sha256":"4731d301224998fa24c08cb2a697ec042e0c1046daa58aeb8a93df57ac025135","abstract_canon_sha256":"b7997d93c2d6cee01836ec168b3be5e878e0b732f45bd84b3228e6657314f8b1"},"schema_version":"1.0"},"canonical_sha256":"d239644c032eaa2e5f657b898ab3f66fc53719d9a7ee6b15fd0654a4004b97b2","source":{"kind":"arxiv","id":"astro-ph/0011561","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0011561","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0011561v1","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0011561","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"pith_short_12","alias_value":"2I4WITADF2VC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"2I4WITADF2VC4X3F","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"2I4WITAD","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:2I4WITADF2VC4X3FPOEYVM7WN7","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0011561","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-30T21:52:27Z","cross_cats_sorted":[],"title_canon_sha256":"4731d301224998fa24c08cb2a697ec042e0c1046daa58aeb8a93df57ac025135","abstract_canon_sha256":"b7997d93c2d6cee01836ec168b3be5e878e0b732f45bd84b3228e6657314f8b1"},"schema_version":"1.0"},"canonical_sha256":"d239644c032eaa2e5f657b898ab3f66fc53719d9a7ee6b15fd0654a4004b97b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:18:34.369869Z","signature_b64":"Qrx7/673J8UXo0OtUDQojEVsHh+1AfdgnF9uqSbfIRKmxq9FPb4znxsPoOSXj255DDYz1F8Vf4CYQRxM/4r3BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d239644c032eaa2e5f657b898ab3f66fc53719d9a7ee6b15fd0654a4004b97b2","last_reissued_at":"2026-05-18T01:18:34.369420Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:18:34.369420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0011561","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":"2026-05-18T01:18:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zb3k4xmz6cuA8lpPssb8DLC0xCnVljPapA78o2WCNqsx+BIA1wSr66PEYvrNFVPQ6jHp9QYQJGNBSGzHzVsuCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:49:27.238485Z"},"content_sha256":"02aed69a87e0ca632b473bfadfbfda17fa155688bbc4d5423526a5652edc0539","schema_version":"1.0","event_id":"sha256:02aed69a87e0ca632b473bfadfbfda17fa155688bbc4d5423526a5652edc0539"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:2I4WITADF2VC4X3FPOEYVM7WN7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Optical Counterpart to the Anomalous X-ray Pulsar 4U 0142+61","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F. Hulleman (Utrecht University), M.H. van Kerkwijk (Utrecht University), S.R. Kulkarni(Caltech)","submitted_at":"2000-11-30T21:52:27Z","abstract_excerpt":"The energy source of the anomalous X-ray pulsars is not well understood, hence their designation as anomalous. Unlike binary X-ray pulsars, no companions are seen, so the energy cannot be supplied by accretion of matter from a companion star. The loss of rotational energy, which powers radio pulsars, is insufficient to power AXPs. Two models are generally considered: accretion from a large disk left over from the birth process, or decay of a very strong magnetic field (10^15 G) associated with a 'magnetar'. The lack of counterparts at other wavelengths has hampered progress in our understandin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0011561","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":"2026-05-18T01:18:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wc/GPFosOU1xajwFkLMmv5KntY+QpkYUddcfzottIV0hu0pW2WsYBsvtacpEvm6r8ZNyyGapHF015FeN76imAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T21:49:27.238831Z"},"content_sha256":"e0f94a493a07daabaa3eecc60dc2dbda1e23d4759f3b66ae727d3b7c1c84bfdc","schema_version":"1.0","event_id":"sha256:e0f94a493a07daabaa3eecc60dc2dbda1e23d4759f3b66ae727d3b7c1c84bfdc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2I4WITADF2VC4X3FPOEYVM7WN7/bundle.json","state_url":"https://pith.science/pith/2I4WITADF2VC4X3FPOEYVM7WN7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2I4WITADF2VC4X3FPOEYVM7WN7/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":"2026-06-02T21:49:27Z","links":{"resolver":"https://pith.science/pith/2I4WITADF2VC4X3FPOEYVM7WN7","bundle":"https://pith.science/pith/2I4WITADF2VC4X3FPOEYVM7WN7/bundle.json","state":"https://pith.science/pith/2I4WITADF2VC4X3FPOEYVM7WN7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2I4WITADF2VC4X3FPOEYVM7WN7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:2I4WITADF2VC4X3FPOEYVM7WN7","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":"b7997d93c2d6cee01836ec168b3be5e878e0b732f45bd84b3228e6657314f8b1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-30T21:52:27Z","title_canon_sha256":"4731d301224998fa24c08cb2a697ec042e0c1046daa58aeb8a93df57ac025135"},"schema_version":"1.0","source":{"id":"astro-ph/0011561","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0011561","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0011561v1","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0011561","created_at":"2026-05-18T01:18:34Z"},{"alias_kind":"pith_short_12","alias_value":"2I4WITADF2VC","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"2I4WITADF2VC4X3F","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"2I4WITAD","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:e0f94a493a07daabaa3eecc60dc2dbda1e23d4759f3b66ae727d3b7c1c84bfdc","target":"graph","created_at":"2026-05-18T01:18:34Z","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":"The energy source of the anomalous X-ray pulsars is not well understood, hence their designation as anomalous. Unlike binary X-ray pulsars, no companions are seen, so the energy cannot be supplied by accretion of matter from a companion star. The loss of rotational energy, which powers radio pulsars, is insufficient to power AXPs. Two models are generally considered: accretion from a large disk left over from the birth process, or decay of a very strong magnetic field (10^15 G) associated with a 'magnetar'. The lack of counterparts at other wavelengths has hampered progress in our understandin","authors_text":"F. Hulleman (Utrecht University), M.H. van Kerkwijk (Utrecht University), S.R. Kulkarni(Caltech)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-11-30T21:52:27Z","title":"An Optical Counterpart to the Anomalous X-ray Pulsar 4U 0142+61"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0011561","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":"sha256:02aed69a87e0ca632b473bfadfbfda17fa155688bbc4d5423526a5652edc0539","target":"record","created_at":"2026-05-18T01:18:34Z","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":"b7997d93c2d6cee01836ec168b3be5e878e0b732f45bd84b3228e6657314f8b1","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-11-30T21:52:27Z","title_canon_sha256":"4731d301224998fa24c08cb2a697ec042e0c1046daa58aeb8a93df57ac025135"},"schema_version":"1.0","source":{"id":"astro-ph/0011561","kind":"arxiv","version":1}},"canonical_sha256":"d239644c032eaa2e5f657b898ab3f66fc53719d9a7ee6b15fd0654a4004b97b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d239644c032eaa2e5f657b898ab3f66fc53719d9a7ee6b15fd0654a4004b97b2","first_computed_at":"2026-05-18T01:18:34.369420Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:34.369420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qrx7/673J8UXo0OtUDQojEVsHh+1AfdgnF9uqSbfIRKmxq9FPb4znxsPoOSXj255DDYz1F8Vf4CYQRxM/4r3BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:34.369869Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0011561","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02aed69a87e0ca632b473bfadfbfda17fa155688bbc4d5423526a5652edc0539","sha256:e0f94a493a07daabaa3eecc60dc2dbda1e23d4759f3b66ae727d3b7c1c84bfdc"],"state_sha256":"f039347b5e0d4ef08b854fa1bcee67afabcebcd8596e7387a8823b0c57fa9e91"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pTBoVKNUgwCGcVaS7BBdlKw/z4bIl+KCyeK8MtqjitsfCCPl9zbGmHPNIdxd7JqB4K37BSKiEja3cJ/PF48qBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T21:49:27.240766Z","bundle_sha256":"d46b8fdc0674b9a47fa883bbcc56800407587963bfd0baac5e2dd0ba5b6f6054"}}