{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZTBRQIV4VFGKMPB4HESOHUCIRP","short_pith_number":"pith:ZTBRQIV4","canonical_record":{"source":{"id":"0908.2672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-19T03:26:00Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"14df7c5306fab4983f25255621ed4d63913cf23f0b1a1a62b56785466fb699f6","abstract_canon_sha256":"33d317231c2bbfb4c72b6f531edd4706fcbf0f081a5e03d37e92b76a9546b461"},"schema_version":"1.0"},"canonical_sha256":"ccc31822bca94ca63c3c3924e3d0488bc82cbf7bf8d0b7e055544b74a66591bd","source":{"kind":"arxiv","id":"0908.2672","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.2672","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"arxiv_version","alias_value":"0908.2672v1","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.2672","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"pith_short_12","alias_value":"ZTBRQIV4VFGK","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZTBRQIV4VFGKMPB4","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZTBRQIV4","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZTBRQIV4VFGKMPB4HESOHUCIRP","target":"record","payload":{"canonical_record":{"source":{"id":"0908.2672","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-19T03:26:00Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"14df7c5306fab4983f25255621ed4d63913cf23f0b1a1a62b56785466fb699f6","abstract_canon_sha256":"33d317231c2bbfb4c72b6f531edd4706fcbf0f081a5e03d37e92b76a9546b461"},"schema_version":"1.0"},"canonical_sha256":"ccc31822bca94ca63c3c3924e3d0488bc82cbf7bf8d0b7e055544b74a66591bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:25.358634Z","signature_b64":"oGV6fUvmOzP2QikhaUKQmfgxJGU/5lBqoACW8IbrQDVmIqj/BDpojIDVbGXSw8zedZsJIwuDHc9pVv3yLnzWCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ccc31822bca94ca63c3c3924e3d0488bc82cbf7bf8d0b7e055544b74a66591bd","last_reissued_at":"2026-05-18T02:12:25.357696Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:25.357696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0908.2672","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":"2026-05-18T02:12:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2A2qlYt+D2kzCFZvasFHG6UTWnUzRLgfH1NGc55ImxH2U7tI3OpDNG3hE5lp0YymMpPv76V6aN13sN9XmyW6BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:55:02.922778Z"},"content_sha256":"6da122ac8ed0b84f3d1d7e8bf1b9afc3fd49789e8bcec3f5fb5d6baca34c2ce4","schema_version":"1.0","event_id":"sha256:6da122ac8ed0b84f3d1d7e8bf1b9afc3fd49789e8bcec3f5fb5d6baca34c2ce4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZTBRQIV4VFGKMPB4HESOHUCIRP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can stellar mass black holes be quark stars?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.HE","authors_text":"K. S. Cheng, T. Harko, Z. Kovacs","submitted_at":"2009-08-19T03:26:00Z","abstract_excerpt":"We investigate the possibility that stellar mass black holes, with masses in the range of $3.8M_{\\odot}$ and $6M_{\\odot}$, respectively, could be in fact quark stars in the Color-Flavor-Locked (CFL) phase. Depending on the value of the gap parameter, rapidly rotating CFL quark stars can achieve much higher masses than standard neutron stars, thus making them possible stellar mass black hole candidates. Moreover, quark stars have a very low luminosity and a completely absorbing surface - the infalling matter on the surface of the quark star is converted into quark matter. A possibility of disti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.2672","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":"2026-05-18T02:12:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4LeRrf0tw+krG8w/yFU7GKcvh7k0037/7px38nQ5aRkifSVrYyJADfCw5tx1fPekuFpbQ2BpRbGnDx4hSC7mAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:55:02.923389Z"},"content_sha256":"5ab85549eb22627b3f9b889bb38e89201fbe4c6dd1436ab5dfd63dccb1413ec6","schema_version":"1.0","event_id":"sha256:5ab85549eb22627b3f9b889bb38e89201fbe4c6dd1436ab5dfd63dccb1413ec6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/bundle.json","state_url":"https://pith.science/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/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":"2026-05-27T19:55:02Z","links":{"resolver":"https://pith.science/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP","bundle":"https://pith.science/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/bundle.json","state":"https://pith.science/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZTBRQIV4VFGKMPB4HESOHUCIRP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZTBRQIV4VFGKMPB4HESOHUCIRP","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":"33d317231c2bbfb4c72b6f531edd4706fcbf0f081a5e03d37e92b76a9546b461","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-19T03:26:00Z","title_canon_sha256":"14df7c5306fab4983f25255621ed4d63913cf23f0b1a1a62b56785466fb699f6"},"schema_version":"1.0","source":{"id":"0908.2672","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.2672","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"arxiv_version","alias_value":"0908.2672v1","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.2672","created_at":"2026-05-18T02:12:25Z"},{"alias_kind":"pith_short_12","alias_value":"ZTBRQIV4VFGK","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZTBRQIV4VFGKMPB4","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZTBRQIV4","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:5ab85549eb22627b3f9b889bb38e89201fbe4c6dd1436ab5dfd63dccb1413ec6","target":"graph","created_at":"2026-05-18T02:12:25Z","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":"We investigate the possibility that stellar mass black holes, with masses in the range of $3.8M_{\\odot}$ and $6M_{\\odot}$, respectively, could be in fact quark stars in the Color-Flavor-Locked (CFL) phase. Depending on the value of the gap parameter, rapidly rotating CFL quark stars can achieve much higher masses than standard neutron stars, thus making them possible stellar mass black hole candidates. Moreover, quark stars have a very low luminosity and a completely absorbing surface - the infalling matter on the surface of the quark star is converted into quark matter. A possibility of disti","authors_text":"K. S. Cheng, T. Harko, Z. Kovacs","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-19T03:26:00Z","title":"Can stellar mass black holes be quark stars?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.2672","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":"sha256:6da122ac8ed0b84f3d1d7e8bf1b9afc3fd49789e8bcec3f5fb5d6baca34c2ce4","target":"record","created_at":"2026-05-18T02:12:25Z","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":"33d317231c2bbfb4c72b6f531edd4706fcbf0f081a5e03d37e92b76a9546b461","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-08-19T03:26:00Z","title_canon_sha256":"14df7c5306fab4983f25255621ed4d63913cf23f0b1a1a62b56785466fb699f6"},"schema_version":"1.0","source":{"id":"0908.2672","kind":"arxiv","version":1}},"canonical_sha256":"ccc31822bca94ca63c3c3924e3d0488bc82cbf7bf8d0b7e055544b74a66591bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ccc31822bca94ca63c3c3924e3d0488bc82cbf7bf8d0b7e055544b74a66591bd","first_computed_at":"2026-05-18T02:12:25.357696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:25.357696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oGV6fUvmOzP2QikhaUKQmfgxJGU/5lBqoACW8IbrQDVmIqj/BDpojIDVbGXSw8zedZsJIwuDHc9pVv3yLnzWCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:25.358634Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.2672","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6da122ac8ed0b84f3d1d7e8bf1b9afc3fd49789e8bcec3f5fb5d6baca34c2ce4","sha256:5ab85549eb22627b3f9b889bb38e89201fbe4c6dd1436ab5dfd63dccb1413ec6"],"state_sha256":"11a6df0e298eb339312f2ea309cd3b64a973e06bcf150f2c660a22bb40714605"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oUfwfIKU5lDYnxrkjQGbCYg6PFZytqtVlSa0VpBXpKBZDyKaPe6L7qyYJk4k0pfvhfy322dIkFEIx9WpKd9lBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T19:55:02.925884Z","bundle_sha256":"7e189ba5566a1ae5d9e5800a624cca7b29991575ace2c904edb7cda7d1b15a39"}}