{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:LVGMZQ4OF4FAE4IY2T6C5A6IRT","short_pith_number":"pith:LVGMZQ4O","canonical_record":{"source":{"id":"1406.1497","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-06-05T19:43:03Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"2375c134e2f99b68938efa42c424db97617a402d010557f3f0d5e31a840d6fa0","abstract_canon_sha256":"be730bce4d7ac405ff2a74ef94466da84e95e255cba4bcb7a1f74ddae2a599fa"},"schema_version":"1.0"},"canonical_sha256":"5d4cccc38e2f0a027118d4fc2e83c88cea161d5bf2c88222ddb22a9d2b3fe000","source":{"kind":"arxiv","id":"1406.1497","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.1497","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"arxiv_version","alias_value":"1406.1497v1","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1497","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"pith_short_12","alias_value":"LVGMZQ4OF4FA","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"LVGMZQ4OF4FAE4IY","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"LVGMZQ4O","created_at":"2026-05-18T12:28:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:LVGMZQ4OF4FAE4IY2T6C5A6IRT","target":"record","payload":{"canonical_record":{"source":{"id":"1406.1497","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-06-05T19:43:03Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"2375c134e2f99b68938efa42c424db97617a402d010557f3f0d5e31a840d6fa0","abstract_canon_sha256":"be730bce4d7ac405ff2a74ef94466da84e95e255cba4bcb7a1f74ddae2a599fa"},"schema_version":"1.0"},"canonical_sha256":"5d4cccc38e2f0a027118d4fc2e83c88cea161d5bf2c88222ddb22a9d2b3fe000","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:01.749664Z","signature_b64":"m3D7ZNJRTr6n9pRYkLjoLX2ZuhAaUCsrLLJ2Y3XvYcMyHXzbSaUc8y6JvGncSSU42p5DoDV5M5wFW4dCrslWCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5d4cccc38e2f0a027118d4fc2e83c88cea161d5bf2c88222ddb22a9d2b3fe000","last_reissued_at":"2026-05-18T01:43:01.749288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:01.749288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.1497","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":"2026-05-18T01:43:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AstvH7jTc84PL7eC78WHQN/b9OjSf7Bcj4go2o4s01zmv2tDxr7OSLUCZ/+U2tBYFrJbBoBETkrMyPKcuzeSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:43:07.652675Z"},"content_sha256":"4b25833b2858fd0b3f5cd761828d7b9a7d2fe7a86d45d63317ba692eef8433e4","schema_version":"1.0","event_id":"sha256:4b25833b2858fd0b3f5cd761828d7b9a7d2fe7a86d45d63317ba692eef8433e4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:LVGMZQ4OF4FAE4IY2T6C5A6IRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Mass and Radius Constraints for Quiescent Neutron Stars in Omega Cen and NGC 6397","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"(10) Harvard), ((1) U. of Alberta, (2) Indiana U., (3) U. de Toulouse, (4) U. of Southampton, (5) STScI, (6) INAF-Brera, (7) Columbia, (8) Northwestern, (9) San Francisco State U., A. M. Cool (9), C. O. Heinke (1), D. Haggard (8), H. N. Cohn (2), IRAP, J. Anderson (5), J. E. Grindlay (10), N. A. Webb (3), P. M. Lugger (2), S. Bogdanov (7), S. Campana (6), W. C. G. Ho (4)","submitted_at":"2014-06-05T19:43:03Z","abstract_excerpt":"We use Chandra and XMM observations of the globular clusters $\\omega$ Cen and NGC 6397 to measure the spectrum of their quiescent neutron stars (NSs), and thus to constrain the allowed ranges of mass and radius for each. We also use Hubble Space Telescope photometry of NGC 6397 to identify a potential optical companion to the quiescent NS, and find evidence that the companion lacks hydrogen. We carefully consider a number of systematic problems, and show that the choices of atmospheric composition, interstellar medium abundances, and cluster distances can have important effects on the inferred"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1497","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":"2026-05-18T01:43:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ay2BAMtkzFAmZ/n9WFm+nQVw+Xu02a+mwIxjkx8yEIe/mJ+wCxojsQgpYLJEgoL84fpK7s8koKkIzzZ86OotDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T05:43:07.653032Z"},"content_sha256":"deb1a1182ee6d810f5e5e38fc1526a5137fd217f4e38c449078361e9ab60b729","schema_version":"1.0","event_id":"sha256:deb1a1182ee6d810f5e5e38fc1526a5137fd217f4e38c449078361e9ab60b729"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/bundle.json","state_url":"https://pith.science/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/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":"2026-06-01T05:43:07Z","links":{"resolver":"https://pith.science/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT","bundle":"https://pith.science/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/bundle.json","state":"https://pith.science/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LVGMZQ4OF4FAE4IY2T6C5A6IRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:LVGMZQ4OF4FAE4IY2T6C5A6IRT","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":"be730bce4d7ac405ff2a74ef94466da84e95e255cba4bcb7a1f74ddae2a599fa","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-06-05T19:43:03Z","title_canon_sha256":"2375c134e2f99b68938efa42c424db97617a402d010557f3f0d5e31a840d6fa0"},"schema_version":"1.0","source":{"id":"1406.1497","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.1497","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"arxiv_version","alias_value":"1406.1497v1","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1497","created_at":"2026-05-18T01:43:01Z"},{"alias_kind":"pith_short_12","alias_value":"LVGMZQ4OF4FA","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"LVGMZQ4OF4FAE4IY","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"LVGMZQ4O","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:deb1a1182ee6d810f5e5e38fc1526a5137fd217f4e38c449078361e9ab60b729","target":"graph","created_at":"2026-05-18T01:43:01Z","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 use Chandra and XMM observations of the globular clusters $\\omega$ Cen and NGC 6397 to measure the spectrum of their quiescent neutron stars (NSs), and thus to constrain the allowed ranges of mass and radius for each. We also use Hubble Space Telescope photometry of NGC 6397 to identify a potential optical companion to the quiescent NS, and find evidence that the companion lacks hydrogen. We carefully consider a number of systematic problems, and show that the choices of atmospheric composition, interstellar medium abundances, and cluster distances can have important effects on the inferred","authors_text":"(10) Harvard), ((1) U. of Alberta, (2) Indiana U., (3) U. de Toulouse, (4) U. of Southampton, (5) STScI, (6) INAF-Brera, (7) Columbia, (8) Northwestern, (9) San Francisco State U., A. M. Cool (9), C. O. Heinke (1), D. Haggard (8), H. N. Cohn (2), IRAP, J. Anderson (5), J. E. Grindlay (10), N. A. Webb (3), P. M. Lugger (2), S. Bogdanov (7), S. Campana (6), W. C. G. Ho (4)","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-06-05T19:43:03Z","title":"Improved Mass and Radius Constraints for Quiescent Neutron Stars in Omega Cen and NGC 6397"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1497","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":"sha256:4b25833b2858fd0b3f5cd761828d7b9a7d2fe7a86d45d63317ba692eef8433e4","target":"record","created_at":"2026-05-18T01:43:01Z","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":"be730bce4d7ac405ff2a74ef94466da84e95e255cba4bcb7a1f74ddae2a599fa","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-06-05T19:43:03Z","title_canon_sha256":"2375c134e2f99b68938efa42c424db97617a402d010557f3f0d5e31a840d6fa0"},"schema_version":"1.0","source":{"id":"1406.1497","kind":"arxiv","version":1}},"canonical_sha256":"5d4cccc38e2f0a027118d4fc2e83c88cea161d5bf2c88222ddb22a9d2b3fe000","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5d4cccc38e2f0a027118d4fc2e83c88cea161d5bf2c88222ddb22a9d2b3fe000","first_computed_at":"2026-05-18T01:43:01.749288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:01.749288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m3D7ZNJRTr6n9pRYkLjoLX2ZuhAaUCsrLLJ2Y3XvYcMyHXzbSaUc8y6JvGncSSU42p5DoDV5M5wFW4dCrslWCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:01.749664Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.1497","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b25833b2858fd0b3f5cd761828d7b9a7d2fe7a86d45d63317ba692eef8433e4","sha256:deb1a1182ee6d810f5e5e38fc1526a5137fd217f4e38c449078361e9ab60b729"],"state_sha256":"5eb467378e5978debfe1f03ad5e7d45ce6ea391caf0f8f1afba81477553807f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6xMZc8ofSyGYmYdt1cm/lxysiXFR+UOHAK2jBC/ZQ61OMxn2RudNVfBhKXeQcb3Qbg4Jly2lG9N3sca3UDh/DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T05:43:07.655400Z","bundle_sha256":"466f3e2b8b011cf9fc2ae9f97d37840d7f6ebbf88d5d17fafddb0d458464327e"}}