{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:FBRTNC3UQ6F3RBA2W6GBWUYAOT","short_pith_number":"pith:FBRTNC3U","canonical_record":{"source":{"id":"astro-ph/9704225","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-23T10:03:50Z","cross_cats_sorted":[],"title_canon_sha256":"d114a6445b33407171e4e04bec33ee220c57604ae2e6a847a66cececf5935725","abstract_canon_sha256":"7c09bec18b9ce5b6f04c11f4efdf848a745b357165b2ffd7ef113eb388f6f5d8"},"schema_version":"1.0"},"canonical_sha256":"2863368b74878bb8841ab78c1b530074f5bbe7d459d9e7022f3a4a98b4ee941e","source":{"kind":"arxiv","id":"astro-ph/9704225","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9704225","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9704225v1","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9704225","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"FBRTNC3UQ6F3","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"FBRTNC3UQ6F3RBA2","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"FBRTNC3U","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:FBRTNC3UQ6F3RBA2W6GBWUYAOT","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9704225","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-23T10:03:50Z","cross_cats_sorted":[],"title_canon_sha256":"d114a6445b33407171e4e04bec33ee220c57604ae2e6a847a66cececf5935725","abstract_canon_sha256":"7c09bec18b9ce5b6f04c11f4efdf848a745b357165b2ffd7ef113eb388f6f5d8"},"schema_version":"1.0"},"canonical_sha256":"2863368b74878bb8841ab78c1b530074f5bbe7d459d9e7022f3a4a98b4ee941e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:17.625650Z","signature_b64":"gGOoteaBxw/1vvW/yUskLKHa0UApU+3jIeh4T6srOgzhbjtu5bXygGpcFVZ0Td4tY0zDzukPgdDMmCUJNVjXBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2863368b74878bb8841ab78c1b530074f5bbe7d459d9e7022f3a4a98b4ee941e","last_reissued_at":"2026-05-18T01:40:17.624917Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:17.624917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9704225","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":"2026-05-18T01:40:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SmCVKSCpcJEpFFQ3YMougBfMrhgTb2ZTQyYyNcd/rGOR/TNjhtXwNUjDD97+2NIshFxV9Fnoc62JEFktFWLrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:12:07.045968Z"},"content_sha256":"2137354469bb75e0ff635aa6fa8b12e104b01ead7c9d3aee57f965d17fd165b3","schema_version":"1.0","event_id":"sha256:2137354469bb75e0ff635aa6fa8b12e104b01ead7c9d3aee57f965d17fd165b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:FBRTNC3UQ6F3RBA2W6GBWUYAOT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Vela pulsar `jet': a companion-punctured bubble of fallback material","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Cambridge), Ralph A.M.J. Wijers, Steinn Sigurdsson (Institute of Astronomy","submitted_at":"1997-04-23T10:03:50Z","abstract_excerpt":"Markwardt and Oegelman (1995) used ROSAT to reveal a 12 by 45 arcmin structure in 1 keV X rays around the Vela pulsar, which they interpret as a jet emanating from the pulsar. We here present an alternative view of the nature of this feature, namely that it consists of material from very deep inside the exploding star, close to the mass cut between material that became part of the neutron star and ejected material. The initial radial velocity of the inner material was lower than the bulk of the ejecta, and formed a bubble of slow material that started expanding again due to heating by the youn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9704225","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":"2026-05-18T01:40:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cAB906fJMRIkCiohqNu/E9pl10dVzzm08wjJp0mp2/1IeVIk8QvHUnqVkMkQ5d4Psma/Pr3hWNZKSU6t6qG8CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:12:07.046334Z"},"content_sha256":"67bcf670698600eb2b47ec01a80585226304a9a4c18f4bb339de8d64d54be813","schema_version":"1.0","event_id":"sha256:67bcf670698600eb2b47ec01a80585226304a9a4c18f4bb339de8d64d54be813"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/bundle.json","state_url":"https://pith.science/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/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":"2026-06-03T14:12:07Z","links":{"resolver":"https://pith.science/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT","bundle":"https://pith.science/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/bundle.json","state":"https://pith.science/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FBRTNC3UQ6F3RBA2W6GBWUYAOT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:FBRTNC3UQ6F3RBA2W6GBWUYAOT","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":"7c09bec18b9ce5b6f04c11f4efdf848a745b357165b2ffd7ef113eb388f6f5d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-23T10:03:50Z","title_canon_sha256":"d114a6445b33407171e4e04bec33ee220c57604ae2e6a847a66cececf5935725"},"schema_version":"1.0","source":{"id":"astro-ph/9704225","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9704225","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9704225v1","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9704225","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"FBRTNC3UQ6F3","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"FBRTNC3UQ6F3RBA2","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"FBRTNC3U","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:67bcf670698600eb2b47ec01a80585226304a9a4c18f4bb339de8d64d54be813","target":"graph","created_at":"2026-05-18T01:40:17Z","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":"Markwardt and Oegelman (1995) used ROSAT to reveal a 12 by 45 arcmin structure in 1 keV X rays around the Vela pulsar, which they interpret as a jet emanating from the pulsar. We here present an alternative view of the nature of this feature, namely that it consists of material from very deep inside the exploding star, close to the mass cut between material that became part of the neutron star and ejected material. The initial radial velocity of the inner material was lower than the bulk of the ejecta, and formed a bubble of slow material that started expanding again due to heating by the youn","authors_text":"Cambridge), Ralph A.M.J. Wijers, Steinn Sigurdsson (Institute of Astronomy","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-04-23T10:03:50Z","title":"The Vela pulsar `jet': a companion-punctured bubble of fallback material"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9704225","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":"sha256:2137354469bb75e0ff635aa6fa8b12e104b01ead7c9d3aee57f965d17fd165b3","target":"record","created_at":"2026-05-18T01:40:17Z","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":"7c09bec18b9ce5b6f04c11f4efdf848a745b357165b2ffd7ef113eb388f6f5d8","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-23T10:03:50Z","title_canon_sha256":"d114a6445b33407171e4e04bec33ee220c57604ae2e6a847a66cececf5935725"},"schema_version":"1.0","source":{"id":"astro-ph/9704225","kind":"arxiv","version":1}},"canonical_sha256":"2863368b74878bb8841ab78c1b530074f5bbe7d459d9e7022f3a4a98b4ee941e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2863368b74878bb8841ab78c1b530074f5bbe7d459d9e7022f3a4a98b4ee941e","first_computed_at":"2026-05-18T01:40:17.624917Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:17.624917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gGOoteaBxw/1vvW/yUskLKHa0UApU+3jIeh4T6srOgzhbjtu5bXygGpcFVZ0Td4tY0zDzukPgdDMmCUJNVjXBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:17.625650Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9704225","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2137354469bb75e0ff635aa6fa8b12e104b01ead7c9d3aee57f965d17fd165b3","sha256:67bcf670698600eb2b47ec01a80585226304a9a4c18f4bb339de8d64d54be813"],"state_sha256":"f8f0ddda70a98fff4f9a057d93441de6c09050b59e748d9b3796560a8ce42625"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RYXfGZymu7nwMKdh4K/iiGYlsL4CsGYJGzncnZB3MYF2sg8mwy/NZhGQV0JXxkpiWAXBYH1MISqivAKdD2wCDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:12:07.048255Z","bundle_sha256":"db8140fc8585a98d0d0b206b6bbf4f71fb94a8733ea39f001a86ec00da669e0a"}}