{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:IQZCS5X74MZHKKJ7CN5M22KXHR","short_pith_number":"pith:IQZCS5X7","canonical_record":{"source":{"id":"1909.04364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-09-10T09:26:09Z","cross_cats_sorted":[],"title_canon_sha256":"5d09c54ff168beaf49b482f030a282ab8f2d04f49c048958eb49e010945c72b7","abstract_canon_sha256":"d402e6613ff76ea96ea3c996e8668588c321ffa13612318faf8061fc0fb83843"},"schema_version":"1.0"},"canonical_sha256":"44322976ffe33275293f137acd69573c6c256edbbf198687e1002e00a4367c76","source":{"kind":"arxiv","id":"1909.04364","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.04364","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"arxiv_version","alias_value":"1909.04364v1","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.04364","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_12","alias_value":"IQZCS5X74MZH","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_16","alias_value":"IQZCS5X74MZHKKJ7","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_8","alias_value":"IQZCS5X7","created_at":"2026-07-05T00:03:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:IQZCS5X74MZHKKJ7CN5M22KXHR","target":"record","payload":{"canonical_record":{"source":{"id":"1909.04364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-09-10T09:26:09Z","cross_cats_sorted":[],"title_canon_sha256":"5d09c54ff168beaf49b482f030a282ab8f2d04f49c048958eb49e010945c72b7","abstract_canon_sha256":"d402e6613ff76ea96ea3c996e8668588c321ffa13612318faf8061fc0fb83843"},"schema_version":"1.0"},"canonical_sha256":"44322976ffe33275293f137acd69573c6c256edbbf198687e1002e00a4367c76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:03:21.355898Z","signature_b64":"7CnWPE0a4qFa4j/gDCLX8kXOIaXoXS5iChMOJaeacmGdZMFHotBzQGSEEu+Mx6nf8+GJbUIUgl8QzfiYGNouBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44322976ffe33275293f137acd69573c6c256edbbf198687e1002e00a4367c76","last_reissued_at":"2026-07-05T00:03:21.355436Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:03:21.355436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.04364","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":"2026-07-05T00:03:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"II8QBQ4K4F0xsQH5n5RlWGthA3ksQN21V7jZQR4f36lDijjE8cAxTsAd29PN6Eva2vhrhd5XSsX8PGOl0mR6CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T12:49:32.377807Z"},"content_sha256":"611f5147009c310976dbe57cbc33c53a29ca8d87970f52e5175ff58f99ab0422","schema_version":"1.0","event_id":"sha256:611f5147009c310976dbe57cbc33c53a29ca8d87970f52e5175ff58f99ab0422"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:IQZCS5X74MZHKKJ7CN5M22KXHR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The brightening of the pulsar wind nebula of PSR B0540--69 after its spin-down rate transition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"F. J. Lu, L. J. Wang, L. L. Yan, M. Y. Ge, Q. D. Wang, S. N. Zhang, S. S. Weng, W. Zhang, Z. J. Li","submitted_at":"2019-09-10T09:26:09Z","abstract_excerpt":"It is believed that an isolated pulsar loses its rotational energy mainly through a relativistic wind consisting of electrons, positrons and possibly Poynting flux\\cite{Pacini1973,Rees1974,Kennel1984}. As it expands, this wind may eventually be terminated by a shock, where particles can be accelerated to energies of X-ray synchrotron emission, and a pulsar wind nebula (PWN) is usually detectable surrounding a young energetic pulsar\\cite{Pacini1973,Rees1974,Kennel1984}. However, the nature and/or energetics of these physical processes remain very uncertain, largely because they typically cannot"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.04364","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.04364/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:03:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4GPvJNmuB87ixHnQUTPpxHbNxoPWDFZawy8qQBSP3ew/XBEjrh3rkWCFAEx0dZi/U2fRErnw9JX49rel+nLEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T12:49:32.378296Z"},"content_sha256":"cac1ca9965e50102ba853d08650e8d799b9528a0290c4cfd31294d5513a86420","schema_version":"1.0","event_id":"sha256:cac1ca9965e50102ba853d08650e8d799b9528a0290c4cfd31294d5513a86420"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/bundle.json","state_url":"https://pith.science/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/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":"2026-08-10T12:49:32Z","links":{"resolver":"https://pith.science/pith/IQZCS5X74MZHKKJ7CN5M22KXHR","bundle":"https://pith.science/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/bundle.json","state":"https://pith.science/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IQZCS5X74MZHKKJ7CN5M22KXHR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:IQZCS5X74MZHKKJ7CN5M22KXHR","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":"d402e6613ff76ea96ea3c996e8668588c321ffa13612318faf8061fc0fb83843","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-09-10T09:26:09Z","title_canon_sha256":"5d09c54ff168beaf49b482f030a282ab8f2d04f49c048958eb49e010945c72b7"},"schema_version":"1.0","source":{"id":"1909.04364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.04364","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"arxiv_version","alias_value":"1909.04364v1","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.04364","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_12","alias_value":"IQZCS5X74MZH","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_16","alias_value":"IQZCS5X74MZHKKJ7","created_at":"2026-07-05T00:03:21Z"},{"alias_kind":"pith_short_8","alias_value":"IQZCS5X7","created_at":"2026-07-05T00:03:21Z"}],"graph_snapshots":[{"event_id":"sha256:cac1ca9965e50102ba853d08650e8d799b9528a0290c4cfd31294d5513a86420","target":"graph","created_at":"2026-07-05T00:03:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1909.04364/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"It is believed that an isolated pulsar loses its rotational energy mainly through a relativistic wind consisting of electrons, positrons and possibly Poynting flux\\cite{Pacini1973,Rees1974,Kennel1984}. As it expands, this wind may eventually be terminated by a shock, where particles can be accelerated to energies of X-ray synchrotron emission, and a pulsar wind nebula (PWN) is usually detectable surrounding a young energetic pulsar\\cite{Pacini1973,Rees1974,Kennel1984}. However, the nature and/or energetics of these physical processes remain very uncertain, largely because they typically cannot","authors_text":"F. J. Lu, L. J. Wang, L. L. Yan, M. Y. Ge, Q. D. Wang, S. N. Zhang, S. S. Weng, W. Zhang, Z. J. Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-09-10T09:26:09Z","title":"The brightening of the pulsar wind nebula of PSR B0540--69 after its spin-down rate transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.04364","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":"sha256:611f5147009c310976dbe57cbc33c53a29ca8d87970f52e5175ff58f99ab0422","target":"record","created_at":"2026-07-05T00:03:21Z","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":"d402e6613ff76ea96ea3c996e8668588c321ffa13612318faf8061fc0fb83843","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-09-10T09:26:09Z","title_canon_sha256":"5d09c54ff168beaf49b482f030a282ab8f2d04f49c048958eb49e010945c72b7"},"schema_version":"1.0","source":{"id":"1909.04364","kind":"arxiv","version":1}},"canonical_sha256":"44322976ffe33275293f137acd69573c6c256edbbf198687e1002e00a4367c76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"44322976ffe33275293f137acd69573c6c256edbbf198687e1002e00a4367c76","first_computed_at":"2026-07-05T00:03:21.355436Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:03:21.355436Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7CnWPE0a4qFa4j/gDCLX8kXOIaXoXS5iChMOJaeacmGdZMFHotBzQGSEEu+Mx6nf8+GJbUIUgl8QzfiYGNouBw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:03:21.355898Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.04364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:611f5147009c310976dbe57cbc33c53a29ca8d87970f52e5175ff58f99ab0422","sha256:cac1ca9965e50102ba853d08650e8d799b9528a0290c4cfd31294d5513a86420"],"state_sha256":"2da9bce134f9b3048f42a8c8d29751fef1f527b6356f0c0bf17269cd6607afc3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tcjDLKm2aP55EZXHU0JBi2k4JzT/VXDXkYduMEjHeq+jkxMe1XHbyZWH/xrONFMG03FqJDSasR1jM/LDeHFaAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T12:49:32.383864Z","bundle_sha256":"fd9ea6e01203bf9d53fba11f766f554ff991e937cd7b7351e10d2f46032c2c69"}}