{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:UZESMXAEZY44MSFHEZSGCQNZBP","short_pith_number":"pith:UZESMXAE","canonical_record":{"source":{"id":"1603.01630","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-04T21:09:26Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"4225cbe50c772355504b4ee7d3bc1edd196afe6df9180611a6ec4a77743c9fce","abstract_canon_sha256":"5f94b46192b08437b8ec6e1c3e030521e72d8130cff4dd5bcb467c02bf60df76"},"schema_version":"1.0"},"canonical_sha256":"a649265c04ce39c648a726646141b90befc1e90b20c40519e19dff0db3f67b11","source":{"kind":"arxiv","id":"1603.01630","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.01630","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"arxiv_version","alias_value":"1603.01630v1","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.01630","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"pith_short_12","alias_value":"UZESMXAEZY44","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UZESMXAEZY44MSFH","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UZESMXAE","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:UZESMXAEZY44MSFHEZSGCQNZBP","target":"record","payload":{"canonical_record":{"source":{"id":"1603.01630","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-04T21:09:26Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"4225cbe50c772355504b4ee7d3bc1edd196afe6df9180611a6ec4a77743c9fce","abstract_canon_sha256":"5f94b46192b08437b8ec6e1c3e030521e72d8130cff4dd5bcb467c02bf60df76"},"schema_version":"1.0"},"canonical_sha256":"a649265c04ce39c648a726646141b90befc1e90b20c40519e19dff0db3f67b11","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:25.753470Z","signature_b64":"TMxNVxIlBvFREXWz1byz3ltRgdRkDlrBtC0/05bZLkDnvMe46PTDvUe49Aj2M1tQggF0BGnLRrypP1l2V6upBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a649265c04ce39c648a726646141b90befc1e90b20c40519e19dff0db3f67b11","last_reissued_at":"2026-05-18T00:59:25.752705Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:25.752705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.01630","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":"2026-05-18T00:59:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T5txjM4R13vpnUPqUa2HHZJe5f8uhHsxzwRgZw5f/EeK1SbkpRKHS6DPrWg4qEB19UJXVHUF8uzJLJh2KmFGCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:06:24.810961Z"},"content_sha256":"6d7b20dacf9f8ce75bf0de607284a393a2efd468801b1f994026949a09f3b7bf","schema_version":"1.0","event_id":"sha256:6d7b20dacf9f8ce75bf0de607284a393a2efd468801b1f994026949a09f3b7bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:UZESMXAEZY44MSFHEZSGCQNZBP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Neutron Star Mass-Radius Constraints of the Quiescent Low-mass X-ray Binaries X7 and X5 in the Globular Cluster 47 Tuc","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-th"],"primary_cat":"astro-ph.HE","authors_text":"Craig O. Heinke, Feryal \\\"Ozel, Slavko Bogdanov, Tolga G\\\"uver","submitted_at":"2016-03-04T21:09:26Z","abstract_excerpt":"We present Chandra ACIS-S sub-array observations of the quiescent neutron star low-mass X-ray binaries X7 and X5 in the globular cluster 47 Tuc. The large reduction in photon pile-up compared to previous deep exposures enables a substantial improvement in the spectroscopic determination of the neutron star radius and mass of these neutron stars. Modeling the thermal emission from the neutron star surface with a non-magnetized hydrogen atmosphere and accounting for numerous sources of uncertainties, we obtain for the neutron star in X7 a radius of $R=11.1^{+0.8}_{-0.7}$ km for an assumed stella"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.01630","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":"2026-05-18T00:59:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vv+sHquYULhIO6UAjFtD4X9exthDVLQWKz7xyfyDhSFYp4eMZtRKGZncuUDw2JS4Q4tIi3cidUJJQgOnzWH4Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:06:24.811636Z"},"content_sha256":"5803a1f4360d3fabf1d62c30d792bbf9cad790c44991e3c83f67b719ca27de67","schema_version":"1.0","event_id":"sha256:5803a1f4360d3fabf1d62c30d792bbf9cad790c44991e3c83f67b719ca27de67"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UZESMXAEZY44MSFHEZSGCQNZBP/bundle.json","state_url":"https://pith.science/pith/UZESMXAEZY44MSFHEZSGCQNZBP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UZESMXAEZY44MSFHEZSGCQNZBP/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":"2026-06-05T06:06:24Z","links":{"resolver":"https://pith.science/pith/UZESMXAEZY44MSFHEZSGCQNZBP","bundle":"https://pith.science/pith/UZESMXAEZY44MSFHEZSGCQNZBP/bundle.json","state":"https://pith.science/pith/UZESMXAEZY44MSFHEZSGCQNZBP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UZESMXAEZY44MSFHEZSGCQNZBP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:UZESMXAEZY44MSFHEZSGCQNZBP","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":"5f94b46192b08437b8ec6e1c3e030521e72d8130cff4dd5bcb467c02bf60df76","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-04T21:09:26Z","title_canon_sha256":"4225cbe50c772355504b4ee7d3bc1edd196afe6df9180611a6ec4a77743c9fce"},"schema_version":"1.0","source":{"id":"1603.01630","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.01630","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"arxiv_version","alias_value":"1603.01630v1","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.01630","created_at":"2026-05-18T00:59:25Z"},{"alias_kind":"pith_short_12","alias_value":"UZESMXAEZY44","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UZESMXAEZY44MSFH","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UZESMXAE","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:5803a1f4360d3fabf1d62c30d792bbf9cad790c44991e3c83f67b719ca27de67","target":"graph","created_at":"2026-05-18T00:59:25Z","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 present Chandra ACIS-S sub-array observations of the quiescent neutron star low-mass X-ray binaries X7 and X5 in the globular cluster 47 Tuc. The large reduction in photon pile-up compared to previous deep exposures enables a substantial improvement in the spectroscopic determination of the neutron star radius and mass of these neutron stars. Modeling the thermal emission from the neutron star surface with a non-magnetized hydrogen atmosphere and accounting for numerous sources of uncertainties, we obtain for the neutron star in X7 a radius of $R=11.1^{+0.8}_{-0.7}$ km for an assumed stella","authors_text":"Craig O. Heinke, Feryal \\\"Ozel, Slavko Bogdanov, Tolga G\\\"uver","cross_cats":["nucl-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-04T21:09:26Z","title":"Neutron Star Mass-Radius Constraints of the Quiescent Low-mass X-ray Binaries X7 and X5 in the Globular Cluster 47 Tuc"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.01630","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":"sha256:6d7b20dacf9f8ce75bf0de607284a393a2efd468801b1f994026949a09f3b7bf","target":"record","created_at":"2026-05-18T00:59:25Z","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":"5f94b46192b08437b8ec6e1c3e030521e72d8130cff4dd5bcb467c02bf60df76","cross_cats_sorted":["nucl-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-04T21:09:26Z","title_canon_sha256":"4225cbe50c772355504b4ee7d3bc1edd196afe6df9180611a6ec4a77743c9fce"},"schema_version":"1.0","source":{"id":"1603.01630","kind":"arxiv","version":1}},"canonical_sha256":"a649265c04ce39c648a726646141b90befc1e90b20c40519e19dff0db3f67b11","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a649265c04ce39c648a726646141b90befc1e90b20c40519e19dff0db3f67b11","first_computed_at":"2026-05-18T00:59:25.752705Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:25.752705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TMxNVxIlBvFREXWz1byz3ltRgdRkDlrBtC0/05bZLkDnvMe46PTDvUe49Aj2M1tQggF0BGnLRrypP1l2V6upBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:25.753470Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.01630","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d7b20dacf9f8ce75bf0de607284a393a2efd468801b1f994026949a09f3b7bf","sha256:5803a1f4360d3fabf1d62c30d792bbf9cad790c44991e3c83f67b719ca27de67"],"state_sha256":"e77c5cbc58cb5bea6bed8df8c5861154615edbf093df8a7531b187fa80eb11b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GvhVOweSkrzHzFHQ0Pj9MfA43WwAbiiNuY31fJ/2Qp3qWRf2yV7KhYSW/y+92FtrqsHxabd9222S4ejgWiwfDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T06:06:24.815411Z","bundle_sha256":"916d2822d5faab44db94958ff71a5891d0c62843fbc4c7b0a73a810febc16779"}}