{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:KN3JNUMXTHBNWTKZFFZIEQ2PKY","short_pith_number":"pith:KN3JNUMX","canonical_record":{"source":{"id":"1212.1749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-12-08T01:45:21Z","cross_cats_sorted":["hep-ph","nucl-th"],"title_canon_sha256":"98b928889a432e2ed76e0f4de9109621a4952d04f4cda69591e1c439ad8ddc43","abstract_canon_sha256":"c5dbd17a224d9376cb88f1734bb273b02d7a2b69500f2e3e99fdea745f8067aa"},"schema_version":"1.0"},"canonical_sha256":"537696d19799c2db4d59297282434f5626361cb88892f6432e085f437ee6b067","source":{"kind":"arxiv","id":"1212.1749","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.1749","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"1212.1749v1","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.1749","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"KN3JNUMXTHBN","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KN3JNUMXTHBNWTKZ","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KN3JNUMX","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:KN3JNUMXTHBNWTKZFFZIEQ2PKY","target":"record","payload":{"canonical_record":{"source":{"id":"1212.1749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-12-08T01:45:21Z","cross_cats_sorted":["hep-ph","nucl-th"],"title_canon_sha256":"98b928889a432e2ed76e0f4de9109621a4952d04f4cda69591e1c439ad8ddc43","abstract_canon_sha256":"c5dbd17a224d9376cb88f1734bb273b02d7a2b69500f2e3e99fdea745f8067aa"},"schema_version":"1.0"},"canonical_sha256":"537696d19799c2db4d59297282434f5626361cb88892f6432e085f437ee6b067","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:46.288180Z","signature_b64":"ThpTEcSkn+/vwqgFR7QJ5DvO0SgBaHOIvmNn/ab3F4I1Z7v0xTQuBcmr7wzUO5S29XqebyZrwrrgC5yvPflqAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"537696d19799c2db4d59297282434f5626361cb88892f6432e085f437ee6b067","last_reissued_at":"2026-05-18T01:52:46.287798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:46.287798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.1749","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":"2026-05-18T01:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZFftK6pwVFjeSarXLwbzqZUGX67fgQ7XsWNsVC13rhaFurGy1JiI39whjxEGPzctXOvL/7X9JcXv5qNE8WfEAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:17:21.046699Z"},"content_sha256":"6262da44aa82e5f6db89f0b0f61e01131f8a534d02f818ceb630b7ba33a07478","schema_version":"1.0","event_id":"sha256:6262da44aa82e5f6db89f0b0f61e01131f8a534d02f818ceb630b7ba33a07478"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:KN3JNUMXTHBNWTKZFFZIEQ2PKY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Connecting neutron star observations to the high density equation of state of quasi-particle model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"Hongshi Zong, Jing Cao, Wei-Min Sun, Xin-lian Luo, Yan Yan","submitted_at":"2012-12-08T01:45:21Z","abstract_excerpt":"The observation of $1.97\\pm0.04$ solar-mass neutron-like star gives constraint on the equation of state (EOS) of cold, condensed matter. In this paper, the EOS for both pure quark star and hybrid star with a quark core described by quasi-particle model are considered. The parameters of quasi-particle model which affect the mass of both quark star and hybrid star can be constrained by the observation."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.1749","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":"2026-05-18T01:52:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OKZ0UZ6R5iNxNNLxBR3L/M8XNJB7FLnOsM3wiag8hnsGGQJ7eB+FjNMdGeEBBDRhER0Y+hoCUvUIS1b67f8LDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:17:21.047047Z"},"content_sha256":"868c55e46e889c09566c43f9fde46afd8b4a782a7c100dd55e3f0e9da30646df","schema_version":"1.0","event_id":"sha256:868c55e46e889c09566c43f9fde46afd8b4a782a7c100dd55e3f0e9da30646df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/bundle.json","state_url":"https://pith.science/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/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":"2026-06-01T05:17:21Z","links":{"resolver":"https://pith.science/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY","bundle":"https://pith.science/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/bundle.json","state":"https://pith.science/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KN3JNUMXTHBNWTKZFFZIEQ2PKY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KN3JNUMXTHBNWTKZFFZIEQ2PKY","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":"c5dbd17a224d9376cb88f1734bb273b02d7a2b69500f2e3e99fdea745f8067aa","cross_cats_sorted":["hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-12-08T01:45:21Z","title_canon_sha256":"98b928889a432e2ed76e0f4de9109621a4952d04f4cda69591e1c439ad8ddc43"},"schema_version":"1.0","source":{"id":"1212.1749","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.1749","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"1212.1749v1","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.1749","created_at":"2026-05-18T01:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"KN3JNUMXTHBN","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KN3JNUMXTHBNWTKZ","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KN3JNUMX","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:868c55e46e889c09566c43f9fde46afd8b4a782a7c100dd55e3f0e9da30646df","target":"graph","created_at":"2026-05-18T01:52:46Z","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 observation of $1.97\\pm0.04$ solar-mass neutron-like star gives constraint on the equation of state (EOS) of cold, condensed matter. In this paper, the EOS for both pure quark star and hybrid star with a quark core described by quasi-particle model are considered. The parameters of quasi-particle model which affect the mass of both quark star and hybrid star can be constrained by the observation.","authors_text":"Hongshi Zong, Jing Cao, Wei-Min Sun, Xin-lian Luo, Yan Yan","cross_cats":["hep-ph","nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-12-08T01:45:21Z","title":"Connecting neutron star observations to the high density equation of state of quasi-particle model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.1749","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":"sha256:6262da44aa82e5f6db89f0b0f61e01131f8a534d02f818ceb630b7ba33a07478","target":"record","created_at":"2026-05-18T01:52:46Z","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":"c5dbd17a224d9376cb88f1734bb273b02d7a2b69500f2e3e99fdea745f8067aa","cross_cats_sorted":["hep-ph","nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-12-08T01:45:21Z","title_canon_sha256":"98b928889a432e2ed76e0f4de9109621a4952d04f4cda69591e1c439ad8ddc43"},"schema_version":"1.0","source":{"id":"1212.1749","kind":"arxiv","version":1}},"canonical_sha256":"537696d19799c2db4d59297282434f5626361cb88892f6432e085f437ee6b067","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"537696d19799c2db4d59297282434f5626361cb88892f6432e085f437ee6b067","first_computed_at":"2026-05-18T01:52:46.287798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:46.287798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ThpTEcSkn+/vwqgFR7QJ5DvO0SgBaHOIvmNn/ab3F4I1Z7v0xTQuBcmr7wzUO5S29XqebyZrwrrgC5yvPflqAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:46.288180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.1749","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6262da44aa82e5f6db89f0b0f61e01131f8a534d02f818ceb630b7ba33a07478","sha256:868c55e46e889c09566c43f9fde46afd8b4a782a7c100dd55e3f0e9da30646df"],"state_sha256":"35f023084b3a7873bfb59fe7c08761ddb408e493f2e8557915574d1a30f92cff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u4g8xrRPfw8k6X7oCcEoieHkqKA0EtkZVuu+EFJurmflkzOv6XSCw8njHgTZilUFZAyeqYax5rm/5IUHEex6Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T05:17:21.049102Z","bundle_sha256":"866a4e51d6eaed20e466717584fbf12d2d3d0f373f7abaa5c8bca52c83ab7d62"}}