{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:KHR2FCOFBTNFWFGVSTKHMQ3VEO","short_pith_number":"pith:KHR2FCOF","canonical_record":{"source":{"id":"1201.3101","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-15T16:30:07Z","cross_cats_sorted":[],"title_canon_sha256":"9ee7627f9e3da2f64aee95b27a4c4f045284057dab4d4dbf15a2b0d14b6ac041","abstract_canon_sha256":"51f97c4165299f1e188ee05dd87017d9d4673b1f0d4007aeaa3c84a3088a0310"},"schema_version":"1.0"},"canonical_sha256":"51e3a289c50cda5b14d594d476437523a871a906a569c0e998b59f90bf5eabcc","source":{"kind":"arxiv","id":"1201.3101","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.3101","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"arxiv_version","alias_value":"1201.3101v2","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.3101","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"pith_short_12","alias_value":"KHR2FCOFBTNF","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KHR2FCOFBTNFWFGV","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KHR2FCOF","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:KHR2FCOFBTNFWFGVSTKHMQ3VEO","target":"record","payload":{"canonical_record":{"source":{"id":"1201.3101","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-15T16:30:07Z","cross_cats_sorted":[],"title_canon_sha256":"9ee7627f9e3da2f64aee95b27a4c4f045284057dab4d4dbf15a2b0d14b6ac041","abstract_canon_sha256":"51f97c4165299f1e188ee05dd87017d9d4673b1f0d4007aeaa3c84a3088a0310"},"schema_version":"1.0"},"canonical_sha256":"51e3a289c50cda5b14d594d476437523a871a906a569c0e998b59f90bf5eabcc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:49.130231Z","signature_b64":"0jl4lzXzATC8mbjBWWfBtEpwNzMMNP4nktHsDevjJsGxT+Bfkwtcc8MVuRB5vQ1koDQ+IoeVcUI5QCZV7tXkDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51e3a289c50cda5b14d594d476437523a871a906a569c0e998b59f90bf5eabcc","last_reissued_at":"2026-05-18T01:58:49.129581Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:49.129581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.3101","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yYruZm/kNJF5ng7FdugImzzVOm602ZwiKuwIx8HP+WMKDl/gpIBXjddEn2+rreZVN5W4mSoFQyngnRZxgsfXDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:00:38.034455Z"},"content_sha256":"74126098834bcd0c469c0a0628914138ef4a67fca023e92483a477271f3e303f","schema_version":"1.0","event_id":"sha256:74126098834bcd0c469c0a0628914138ef4a67fca023e92483a477271f3e303f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:KHR2FCOFBTNFWFGVSTKHMQ3VEO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The missing compact star of SN1987A: a solid quark star?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"G. J. Qiao, J. D. Liang, J. L. Han, R. X. Xu, X. W. Liu","submitted_at":"2012-01-15T16:30:07Z","abstract_excerpt":"To investigate the missing compact star of Supernova 1987A, we analyzed both the cooling and the heating processes of a possible compact star based on the upper limit of observational X-ray luminosity. From the cooling process we found that a solid quark-cluster star, which has a stiffer equation of state than that of conventional liquid quark star, has a heat capacity much smaller than a neutron star. It can cool down quickly, which can naturally explain the non-detection of a point source (neutron star or quark star) in X-ray band. On the other hand, we consider the heating process from magn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.3101","kind":"arxiv","version":2},"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":"2026-05-18T01:58:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HWy3blqBG7XhZ/qNs9qmZssflnB6Sq4A8y5KEs5XBgNrygj1YSYmV0JqVGHYvg2kPk3MYkNW3EkOzynzUW0lCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:00:38.034848Z"},"content_sha256":"5c87a2e918aad249d7a8a167f3a9300cb51b8c703631fe44ac07fab0ecdf0633","schema_version":"1.0","event_id":"sha256:5c87a2e918aad249d7a8a167f3a9300cb51b8c703631fe44ac07fab0ecdf0633"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/bundle.json","state_url":"https://pith.science/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/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":"2026-05-26T23:00:38Z","links":{"resolver":"https://pith.science/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO","bundle":"https://pith.science/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/bundle.json","state":"https://pith.science/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KHR2FCOFBTNFWFGVSTKHMQ3VEO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:KHR2FCOFBTNFWFGVSTKHMQ3VEO","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":"51f97c4165299f1e188ee05dd87017d9d4673b1f0d4007aeaa3c84a3088a0310","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-15T16:30:07Z","title_canon_sha256":"9ee7627f9e3da2f64aee95b27a4c4f045284057dab4d4dbf15a2b0d14b6ac041"},"schema_version":"1.0","source":{"id":"1201.3101","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.3101","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"arxiv_version","alias_value":"1201.3101v2","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.3101","created_at":"2026-05-18T01:58:49Z"},{"alias_kind":"pith_short_12","alias_value":"KHR2FCOFBTNF","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"KHR2FCOFBTNFWFGV","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"KHR2FCOF","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:5c87a2e918aad249d7a8a167f3a9300cb51b8c703631fe44ac07fab0ecdf0633","target":"graph","created_at":"2026-05-18T01:58:49Z","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":"To investigate the missing compact star of Supernova 1987A, we analyzed both the cooling and the heating processes of a possible compact star based on the upper limit of observational X-ray luminosity. From the cooling process we found that a solid quark-cluster star, which has a stiffer equation of state than that of conventional liquid quark star, has a heat capacity much smaller than a neutron star. It can cool down quickly, which can naturally explain the non-detection of a point source (neutron star or quark star) in X-ray band. On the other hand, we consider the heating process from magn","authors_text":"G. J. Qiao, J. D. Liang, J. L. Han, R. X. Xu, X. W. Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-15T16:30:07Z","title":"The missing compact star of SN1987A: a solid quark star?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.3101","kind":"arxiv","version":2},"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":"sha256:74126098834bcd0c469c0a0628914138ef4a67fca023e92483a477271f3e303f","target":"record","created_at":"2026-05-18T01:58:49Z","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":"51f97c4165299f1e188ee05dd87017d9d4673b1f0d4007aeaa3c84a3088a0310","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-01-15T16:30:07Z","title_canon_sha256":"9ee7627f9e3da2f64aee95b27a4c4f045284057dab4d4dbf15a2b0d14b6ac041"},"schema_version":"1.0","source":{"id":"1201.3101","kind":"arxiv","version":2}},"canonical_sha256":"51e3a289c50cda5b14d594d476437523a871a906a569c0e998b59f90bf5eabcc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51e3a289c50cda5b14d594d476437523a871a906a569c0e998b59f90bf5eabcc","first_computed_at":"2026-05-18T01:58:49.129581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:49.129581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0jl4lzXzATC8mbjBWWfBtEpwNzMMNP4nktHsDevjJsGxT+Bfkwtcc8MVuRB5vQ1koDQ+IoeVcUI5QCZV7tXkDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:49.130231Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.3101","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74126098834bcd0c469c0a0628914138ef4a67fca023e92483a477271f3e303f","sha256:5c87a2e918aad249d7a8a167f3a9300cb51b8c703631fe44ac07fab0ecdf0633"],"state_sha256":"fa842f02d661234e5561af870c86427170f6024d5509b4b6eac59465fca15402"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NjpcBf5IYesj6c1dsXHpBvWFhv7FgjAOAVdGfvT9oeHKbJgfyD/LkPNGgDBdNjq2m8gqxsQrnDUdlmGscbPMDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:00:38.037031Z","bundle_sha256":"f8ddd0c2555ec43ccc400842f3e4c9d7ec11c3190e446f125ee843a34d054046"}}