{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:7RHVMPGRVJFOV7XPUKCQ7I2OSB","short_pith_number":"pith:7RHVMPGR","canonical_record":{"source":{"id":"2301.07780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-01-18T20:44:42Z","cross_cats_sorted":[],"title_canon_sha256":"d1c1ebd6bbf97b74566cf974437e1f037f65927a389292be11fa1e689b75ff11","abstract_canon_sha256":"6d00ed2d1f05ad766a3538afe4b000e97d6eefcec69c47c52a5cc6dc086c6b2e"},"schema_version":"1.0"},"canonical_sha256":"fc4f563cd1aa4aeafeefa2850fa34e9057bf88a1b0b00d456ae24755eaba3ee0","source":{"kind":"arxiv","id":"2301.07780","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2301.07780","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"2301.07780v1","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.07780","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"7RHVMPGRVJFO","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_16","alias_value":"7RHVMPGRVJFOV7XP","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_8","alias_value":"7RHVMPGR","created_at":"2026-07-05T05:34:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:7RHVMPGRVJFOV7XPUKCQ7I2OSB","target":"record","payload":{"canonical_record":{"source":{"id":"2301.07780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-01-18T20:44:42Z","cross_cats_sorted":[],"title_canon_sha256":"d1c1ebd6bbf97b74566cf974437e1f037f65927a389292be11fa1e689b75ff11","abstract_canon_sha256":"6d00ed2d1f05ad766a3538afe4b000e97d6eefcec69c47c52a5cc6dc086c6b2e"},"schema_version":"1.0"},"canonical_sha256":"fc4f563cd1aa4aeafeefa2850fa34e9057bf88a1b0b00d456ae24755eaba3ee0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:34:19.302007Z","signature_b64":"wtDrwMF2B/rds6homHy2emWMmhmapQuz6FIoWMs3emIfFsAuRzE9xh01QXDoiEs1A/nUAJqFBrCvCDBovr7QCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc4f563cd1aa4aeafeefa2850fa34e9057bf88a1b0b00d456ae24755eaba3ee0","last_reissued_at":"2026-07-05T05:34:19.301526Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:34:19.301526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2301.07780","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":"2026-07-05T05:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uP9HvVvIclCtE7i5TAFGVwVE9MI8wbqoCAYoqwnA+OuGJwbi9f9rc2eor2sDr5lnOJ9QE5ZL7myTWWCHYO9EAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:25:06.595716Z"},"content_sha256":"ac594ebb73f08bb63e71fdc7d0839e88e30bb61e709b90b48946bd08dec40cd5","schema_version":"1.0","event_id":"sha256:ac594ebb73f08bb63e71fdc7d0839e88e30bb61e709b90b48946bd08dec40cd5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:7RHVMPGRVJFOV7XPUKCQ7I2OSB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Overview of Compact Star Populations and Some of Its Open Problems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Bernardo, J. E. Horvath (IAG-USP), L. M. de S\\'a, L. S. Rocha, P. H. R. S. Moraes, R. R. A. Bachega","submitted_at":"2023-01-18T20:44:42Z","abstract_excerpt":"The study of compact object populations has come a long way since the determination of the mass of the Hulse-Taylor pulsar, and we now count on more than 150 known Galactic neutron stars and black hole masses, as well as another 180 objects from binary mergers detected from gravitational-waves by the Ligo-Virgo-KAGRA Collaboration. With a growing understanding of the variety of systems that host these objects, their formation, evolution and frequency, we are now in a position to evaluate the statistical nature of these populations, their properties, parameter correlations and long-standing pro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.07780","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/2301.07780/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":"2026-07-05T05:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a8JXxCDeU4CO+WD5UAehiDQNTvtaNEnx3RvvYKGVv2KXhful8gDqQlV2ZZLWHZw4bxatOYpV5Tqq0k2dBbaoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T12:25:06.596110Z"},"content_sha256":"ac4c32444cee87903b0dfc63d31447610efd2d57ca8a8dd9ac07ba83731a6bff","schema_version":"1.0","event_id":"sha256:ac4c32444cee87903b0dfc63d31447610efd2d57ca8a8dd9ac07ba83731a6bff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/bundle.json","state_url":"https://pith.science/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/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":"2026-07-06T12:25:06Z","links":{"resolver":"https://pith.science/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB","bundle":"https://pith.science/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/bundle.json","state":"https://pith.science/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7RHVMPGRVJFOV7XPUKCQ7I2OSB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:7RHVMPGRVJFOV7XPUKCQ7I2OSB","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":"6d00ed2d1f05ad766a3538afe4b000e97d6eefcec69c47c52a5cc6dc086c6b2e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-01-18T20:44:42Z","title_canon_sha256":"d1c1ebd6bbf97b74566cf974437e1f037f65927a389292be11fa1e689b75ff11"},"schema_version":"1.0","source":{"id":"2301.07780","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2301.07780","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"2301.07780v1","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.07780","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"7RHVMPGRVJFO","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_16","alias_value":"7RHVMPGRVJFOV7XP","created_at":"2026-07-05T05:34:19Z"},{"alias_kind":"pith_short_8","alias_value":"7RHVMPGR","created_at":"2026-07-05T05:34:19Z"}],"graph_snapshots":[{"event_id":"sha256:ac4c32444cee87903b0dfc63d31447610efd2d57ca8a8dd9ac07ba83731a6bff","target":"graph","created_at":"2026-07-05T05:34:19Z","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/2301.07780/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The study of compact object populations has come a long way since the determination of the mass of the Hulse-Taylor pulsar, and we now count on more than 150 known Galactic neutron stars and black hole masses, as well as another 180 objects from binary mergers detected from gravitational-waves by the Ligo-Virgo-KAGRA Collaboration. With a growing understanding of the variety of systems that host these objects, their formation, evolution and frequency, we are now in a position to evaluate the statistical nature of these populations, their properties, parameter correlations and long-standing pro","authors_text":"A. Bernardo, J. E. Horvath (IAG-USP), L. M. de S\\'a, L. S. Rocha, P. H. R. S. Moraes, R. R. A. Bachega","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-01-18T20:44:42Z","title":"An Overview of Compact Star Populations and Some of Its Open Problems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.07780","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:ac594ebb73f08bb63e71fdc7d0839e88e30bb61e709b90b48946bd08dec40cd5","target":"record","created_at":"2026-07-05T05:34:19Z","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":"6d00ed2d1f05ad766a3538afe4b000e97d6eefcec69c47c52a5cc6dc086c6b2e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-01-18T20:44:42Z","title_canon_sha256":"d1c1ebd6bbf97b74566cf974437e1f037f65927a389292be11fa1e689b75ff11"},"schema_version":"1.0","source":{"id":"2301.07780","kind":"arxiv","version":1}},"canonical_sha256":"fc4f563cd1aa4aeafeefa2850fa34e9057bf88a1b0b00d456ae24755eaba3ee0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc4f563cd1aa4aeafeefa2850fa34e9057bf88a1b0b00d456ae24755eaba3ee0","first_computed_at":"2026-07-05T05:34:19.301526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:34:19.301526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wtDrwMF2B/rds6homHy2emWMmhmapQuz6FIoWMs3emIfFsAuRzE9xh01QXDoiEs1A/nUAJqFBrCvCDBovr7QCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:34:19.302007Z","signed_message":"canonical_sha256_bytes"},"source_id":"2301.07780","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ac594ebb73f08bb63e71fdc7d0839e88e30bb61e709b90b48946bd08dec40cd5","sha256:ac4c32444cee87903b0dfc63d31447610efd2d57ca8a8dd9ac07ba83731a6bff"],"state_sha256":"e111894f8595d158a91fa6b989bdb19a410f4091d9683d9163dcc5565f3cdee1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dOdWqgv4DJshCxFS+t0yvvQLGqw7aJ6Fi+nY2/568DiiZax45Z9KzKfNgUbMSvXwpObn6Z5AXiFK1KZLncR/DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T12:25:06.598077Z","bundle_sha256":"15a4a1505df2969fb4e1cd7ff5180a125671abe80b1063e7fd9f0dbb8787b170"}}