{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:7RDANGOKPF7K5GKJWQU5EBFJ7C","short_pith_number":"pith:7RDANGOK","canonical_record":{"source":{"id":"1507.04206","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-15T13:25:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"881317c108f7725a3ae8ecb8f7705c105497034fb6a5a13d957e49dfcb061647","abstract_canon_sha256":"d7b3bdfa5a402fb032c64761326ccdd22a0d3be86d85be5ca7c51f91ea625c65"},"schema_version":"1.0"},"canonical_sha256":"fc460699ca797eae9949b429d204a9f8942daad933ae9096be11f5228ac5ea78","source":{"kind":"arxiv","id":"1507.04206","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04206","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04206v1","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04206","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"pith_short_12","alias_value":"7RDANGOKPF7K","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7RDANGOKPF7K5GKJ","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7RDANGOK","created_at":"2026-05-18T12:29:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:7RDANGOKPF7K5GKJWQU5EBFJ7C","target":"record","payload":{"canonical_record":{"source":{"id":"1507.04206","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-15T13:25:15Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"881317c108f7725a3ae8ecb8f7705c105497034fb6a5a13d957e49dfcb061647","abstract_canon_sha256":"d7b3bdfa5a402fb032c64761326ccdd22a0d3be86d85be5ca7c51f91ea625c65"},"schema_version":"1.0"},"canonical_sha256":"fc460699ca797eae9949b429d204a9f8942daad933ae9096be11f5228ac5ea78","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:44.367806Z","signature_b64":"CcNnYPGEi1bhOwqO5Jy+XipwtzbxRTW6IHU3mNgiRIvpWeC19Fc0y0czmcJUTw3z9rh0gyum1+FKGxkTw8flCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc460699ca797eae9949b429d204a9f8942daad933ae9096be11f5228ac5ea78","last_reissued_at":"2026-05-18T01:36:44.367173Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:44.367173Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.04206","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":"2026-05-18T01:36:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b3H/5/E18bv0MzTbPeE6r2DHWUafvIslAbAoQVyo9GkkaMMEc4ghr6uJMJV/r3iDxKIafecnJnLxJgpqJTf7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T01:50:14.167554Z"},"content_sha256":"cfd729f7ac7ef251d2afaec5f915f3b5590f65469bc7c57984c0f56aab871b82","schema_version":"1.0","event_id":"sha256:cfd729f7ac7ef251d2afaec5f915f3b5590f65469bc7c57984c0f56aab871b82"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:7RDANGOKPF7K5GKJWQU5EBFJ7C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Statistical theory of thermal evolution of neutron stars - II. Limitations on direct Urca threshold","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"D. G. Yakovlev, M. V. Beznogov","submitted_at":"2015-07-15T13:25:15Z","abstract_excerpt":"We apply our recently suggested statistical approach to thermal evolution of isolated neutron stars and accreting quasistationary neutron stars in X-ray transients for constraining the position and relative broadening alpha of the direct Urca threshold of powerful neutrino emission in neutron star cores. We show that most likely explanation of observations corresponds to alpha = 0.08 - 0.10 and to the neutron star mass, at which the direct Urca process is open, M_D = (1.6 - 1.8) M_sun."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04206","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":"2026-05-18T01:36:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4kBKCUXLZNF+ZyvXK78nHBtFJuc7TVsGvNxlHfXoSPedaNraKXJIep5/U/LxwMI/snleOpIKd1FKuwk5UwNMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T01:50:14.167900Z"},"content_sha256":"7d9b3448ec923c52bf8d9ee9aa68f4e40cc0ea30d40646500c25b05182bb07df","schema_version":"1.0","event_id":"sha256:7d9b3448ec923c52bf8d9ee9aa68f4e40cc0ea30d40646500c25b05182bb07df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/bundle.json","state_url":"https://pith.science/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/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":"2026-07-01T01:50:14Z","links":{"resolver":"https://pith.science/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C","bundle":"https://pith.science/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/bundle.json","state":"https://pith.science/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7RDANGOKPF7K5GKJWQU5EBFJ7C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:7RDANGOKPF7K5GKJWQU5EBFJ7C","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":"d7b3bdfa5a402fb032c64761326ccdd22a0d3be86d85be5ca7c51f91ea625c65","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-15T13:25:15Z","title_canon_sha256":"881317c108f7725a3ae8ecb8f7705c105497034fb6a5a13d957e49dfcb061647"},"schema_version":"1.0","source":{"id":"1507.04206","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.04206","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"arxiv_version","alias_value":"1507.04206v1","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.04206","created_at":"2026-05-18T01:36:44Z"},{"alias_kind":"pith_short_12","alias_value":"7RDANGOKPF7K","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"7RDANGOKPF7K5GKJ","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"7RDANGOK","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:7d9b3448ec923c52bf8d9ee9aa68f4e40cc0ea30d40646500c25b05182bb07df","target":"graph","created_at":"2026-05-18T01:36:44Z","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 apply our recently suggested statistical approach to thermal evolution of isolated neutron stars and accreting quasistationary neutron stars in X-ray transients for constraining the position and relative broadening alpha of the direct Urca threshold of powerful neutrino emission in neutron star cores. We show that most likely explanation of observations corresponds to alpha = 0.08 - 0.10 and to the neutron star mass, at which the direct Urca process is open, M_D = (1.6 - 1.8) M_sun.","authors_text":"D. G. Yakovlev, M. V. Beznogov","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-15T13:25:15Z","title":"Statistical theory of thermal evolution of neutron stars - II. Limitations on direct Urca threshold"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.04206","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:cfd729f7ac7ef251d2afaec5f915f3b5590f65469bc7c57984c0f56aab871b82","target":"record","created_at":"2026-05-18T01:36:44Z","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":"d7b3bdfa5a402fb032c64761326ccdd22a0d3be86d85be5ca7c51f91ea625c65","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-07-15T13:25:15Z","title_canon_sha256":"881317c108f7725a3ae8ecb8f7705c105497034fb6a5a13d957e49dfcb061647"},"schema_version":"1.0","source":{"id":"1507.04206","kind":"arxiv","version":1}},"canonical_sha256":"fc460699ca797eae9949b429d204a9f8942daad933ae9096be11f5228ac5ea78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc460699ca797eae9949b429d204a9f8942daad933ae9096be11f5228ac5ea78","first_computed_at":"2026-05-18T01:36:44.367173Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:44.367173Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CcNnYPGEi1bhOwqO5Jy+XipwtzbxRTW6IHU3mNgiRIvpWeC19Fc0y0czmcJUTw3z9rh0gyum1+FKGxkTw8flCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:44.367806Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.04206","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfd729f7ac7ef251d2afaec5f915f3b5590f65469bc7c57984c0f56aab871b82","sha256:7d9b3448ec923c52bf8d9ee9aa68f4e40cc0ea30d40646500c25b05182bb07df"],"state_sha256":"c07bcd6ca4a969d21b7d207775b0937140997922d31939ca5e510b8c46124284"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DGyNYaYdiwUGoJhoIsFVsO8ezGyxPZIcYtiJBcxYpyo+GlbMQ+53EbMk9KylWHWV6wOuEjiF2pTV/7mbo7bEAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T01:50:14.169992Z","bundle_sha256":"ea88ea54bd440c009bb5c7e467fa2f3cfae1028ec006d462b43187e34fd99643"}}