{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:T4XQK3LNMCKQNME2ZQ54WXMBJN","short_pith_number":"pith:T4XQK3LN","canonical_record":{"source":{"id":"2103.02931","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-03-04T10:24:58Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"716c1acd2ed6959e8477a9094d7f6d11aaddfc9d8a632ba32495f416ddb8452a","abstract_canon_sha256":"6bb2ffeb4a6bad0ddb46b3f5bff780590145132b99053535e6ba887c06d6ebda"},"schema_version":"1.0"},"canonical_sha256":"9f2f056d6d609506b09acc3bcb5d814b65cbf2ad1f857fe7f009e93c5b9a6e51","source":{"kind":"arxiv","id":"2103.02931","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.02931","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"arxiv_version","alias_value":"2103.02931v1","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.02931","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_12","alias_value":"T4XQK3LNMCKQ","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_16","alias_value":"T4XQK3LNMCKQNME2","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_8","alias_value":"T4XQK3LN","created_at":"2026-07-05T02:23:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:T4XQK3LNMCKQNME2ZQ54WXMBJN","target":"record","payload":{"canonical_record":{"source":{"id":"2103.02931","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-03-04T10:24:58Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"716c1acd2ed6959e8477a9094d7f6d11aaddfc9d8a632ba32495f416ddb8452a","abstract_canon_sha256":"6bb2ffeb4a6bad0ddb46b3f5bff780590145132b99053535e6ba887c06d6ebda"},"schema_version":"1.0"},"canonical_sha256":"9f2f056d6d609506b09acc3bcb5d814b65cbf2ad1f857fe7f009e93c5b9a6e51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:23:28.512924Z","signature_b64":"j9dojCtzSKthwnv+0WjQpjQshWxfSErueGr4EGjlYwf1fR1GgSAqBV30SAonjYjX6oBW5kNPM/8riEYzZVloAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f2f056d6d609506b09acc3bcb5d814b65cbf2ad1f857fe7f009e93c5b9a6e51","last_reissued_at":"2026-07-05T02:23:28.512565Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:23:28.512565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.02931","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":"2026-07-05T02:23:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w43UwZo6Kwc8hrv8qsaBcydfBROMl32S9x2VSOR+eoCQS5X5uQaIx9IJTIspItRAv1xqenRPgod8F6Zc4Bo7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T20:55:19.356220Z"},"content_sha256":"07920a739d8457294d0acf6176efc5303c6ee6145d4887c7698e3563ae34bc3a","schema_version":"1.0","event_id":"sha256:07920a739d8457294d0acf6176efc5303c6ee6145d4887c7698e3563ae34bc3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:T4XQK3LNMCKQNME2ZQ54WXMBJN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of millisecond pulsars with helium white dwarfs, ultra-compact X-ray binaries and gravitational wave sources","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Hai-Liang Chen, Thomas M. Tauris, Xuefei Chen, Zhanwen Han","submitted_at":"2021-03-04T10:24:58Z","abstract_excerpt":"Close-orbit low-mass X-ray binaries (LMXBs), radio binary millisecond pulsars (BMSPs) with extremely low-mass helium WDs (ELM He~WDs) and ultra-compact X-ray binaries (UCXBs) are all part of the same evolutionary sequence. It is therefore of uttermost importance to understand how these populations evolve from one specie to another. Moreover, UCXBs are important gravitational wave (GW) sources and can be detected by future space-borne GW observatories. However, the formation and evolutionary link between these three different populations of neutron star (NS) binaries are not fully understood. I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.02931","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/2103.02931/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":"2026-07-05T02:23:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"atWF2iFM5gfgA01YQImzQRWggyOW6496mytuBQmj0acK7ZM6CZ/TfTIoatJSK4/UMcwSJvE8JpjnIBtz02+RAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T20:55:19.357058Z"},"content_sha256":"67c6a705fd3f4f66b91d338ee4ec5925fbc05d7c9ead5c36275b0f71c23ffa3b","schema_version":"1.0","event_id":"sha256:67c6a705fd3f4f66b91d338ee4ec5925fbc05d7c9ead5c36275b0f71c23ffa3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/bundle.json","state_url":"https://pith.science/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/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":"2026-08-16T20:55:19Z","links":{"resolver":"https://pith.science/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN","bundle":"https://pith.science/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/bundle.json","state":"https://pith.science/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T4XQK3LNMCKQNME2ZQ54WXMBJN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:T4XQK3LNMCKQNME2ZQ54WXMBJN","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":"6bb2ffeb4a6bad0ddb46b3f5bff780590145132b99053535e6ba887c06d6ebda","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-03-04T10:24:58Z","title_canon_sha256":"716c1acd2ed6959e8477a9094d7f6d11aaddfc9d8a632ba32495f416ddb8452a"},"schema_version":"1.0","source":{"id":"2103.02931","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.02931","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"arxiv_version","alias_value":"2103.02931v1","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.02931","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_12","alias_value":"T4XQK3LNMCKQ","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_16","alias_value":"T4XQK3LNMCKQNME2","created_at":"2026-07-05T02:23:28Z"},{"alias_kind":"pith_short_8","alias_value":"T4XQK3LN","created_at":"2026-07-05T02:23:28Z"}],"graph_snapshots":[{"event_id":"sha256:67c6a705fd3f4f66b91d338ee4ec5925fbc05d7c9ead5c36275b0f71c23ffa3b","target":"graph","created_at":"2026-07-05T02:23:28Z","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/2103.02931/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Close-orbit low-mass X-ray binaries (LMXBs), radio binary millisecond pulsars (BMSPs) with extremely low-mass helium WDs (ELM He~WDs) and ultra-compact X-ray binaries (UCXBs) are all part of the same evolutionary sequence. It is therefore of uttermost importance to understand how these populations evolve from one specie to another. Moreover, UCXBs are important gravitational wave (GW) sources and can be detected by future space-borne GW observatories. However, the formation and evolutionary link between these three different populations of neutron star (NS) binaries are not fully understood. I","authors_text":"Hai-Liang Chen, Thomas M. Tauris, Xuefei Chen, Zhanwen Han","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-03-04T10:24:58Z","title":"Formation of millisecond pulsars with helium white dwarfs, ultra-compact X-ray binaries and gravitational wave sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.02931","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":"sha256:07920a739d8457294d0acf6176efc5303c6ee6145d4887c7698e3563ae34bc3a","target":"record","created_at":"2026-07-05T02:23:28Z","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":"6bb2ffeb4a6bad0ddb46b3f5bff780590145132b99053535e6ba887c06d6ebda","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-03-04T10:24:58Z","title_canon_sha256":"716c1acd2ed6959e8477a9094d7f6d11aaddfc9d8a632ba32495f416ddb8452a"},"schema_version":"1.0","source":{"id":"2103.02931","kind":"arxiv","version":1}},"canonical_sha256":"9f2f056d6d609506b09acc3bcb5d814b65cbf2ad1f857fe7f009e93c5b9a6e51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f2f056d6d609506b09acc3bcb5d814b65cbf2ad1f857fe7f009e93c5b9a6e51","first_computed_at":"2026-07-05T02:23:28.512565Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:23:28.512565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j9dojCtzSKthwnv+0WjQpjQshWxfSErueGr4EGjlYwf1fR1GgSAqBV30SAonjYjX6oBW5kNPM/8riEYzZVloAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:23:28.512924Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.02931","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:07920a739d8457294d0acf6176efc5303c6ee6145d4887c7698e3563ae34bc3a","sha256:67c6a705fd3f4f66b91d338ee4ec5925fbc05d7c9ead5c36275b0f71c23ffa3b"],"state_sha256":"96826c1bd50ccc8dd2afa3124bc6063954ac099f6086a20364d9b635da0a4963"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CS5XsCqJHz+pUmmf9+Ep7GnFWoEsSJ7tPv8bvyg7G3gU/fVBHkrCZiFnJ59YoQrAHp2Df+MkuKqu5PHLKQj2Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T20:55:19.360936Z","bundle_sha256":"d36fddd8032284bdeb0ffe74bd1836c5f98e915d8f1877eefcf3844e550b120b"}}