{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VKTVVNR6UEU2TM5WXJDHGUPX3Y","short_pith_number":"pith:VKTVVNR6","canonical_record":{"source":{"id":"1802.06081","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-16T19:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"c83f2494fa726c7249a4f595d989258b2ff01f3ebb3dd253aff27c025eeafcca","abstract_canon_sha256":"aa0c3ada47f93dffd0828d364ad5516569be2b6b54accde4022c8e35a0114646"},"schema_version":"1.0"},"canonical_sha256":"aaa75ab63ea129a9b3b6ba467351f7de0e99554e4cdb22b2bb813c676534da44","source":{"kind":"arxiv","id":"1802.06081","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06081","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06081v2","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06081","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"pith_short_12","alias_value":"VKTVVNR6UEU2","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VKTVVNR6UEU2TM5W","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VKTVVNR6","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VKTVVNR6UEU2TM5WXJDHGUPX3Y","target":"record","payload":{"canonical_record":{"source":{"id":"1802.06081","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-16T19:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"c83f2494fa726c7249a4f595d989258b2ff01f3ebb3dd253aff27c025eeafcca","abstract_canon_sha256":"aa0c3ada47f93dffd0828d364ad5516569be2b6b54accde4022c8e35a0114646"},"schema_version":"1.0"},"canonical_sha256":"aaa75ab63ea129a9b3b6ba467351f7de0e99554e4cdb22b2bb813c676534da44","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:08.326989Z","signature_b64":"BxkaGNAEFRTh923tYxFv0LUEkExXTrC054CA+mIhc7i0OuCL/cFCKYEEnBd+gv6e1wlZrthzTNt1JhbuVEVGDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aaa75ab63ea129a9b3b6ba467351f7de0e99554e4cdb22b2bb813c676534da44","last_reissued_at":"2026-05-18T00:19:08.326275Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:08.326275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.06081","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":"2026-05-18T00:19:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QBCab96aIz+RrSaVJlKYzKbSc62vc8QOptPyA+xK/O1JcbYG6fvBZWRQcbr5xA0a1ytCTtHJZKirjZG9z4xUBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:45:24.360047Z"},"content_sha256":"2109a2b9bda0b8b0ff37b119d7f8499d3c241d37acf55cd219d85955f01588b6","schema_version":"1.0","event_id":"sha256:2109a2b9bda0b8b0ff37b119d7f8499d3c241d37acf55cd219d85955f01588b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VKTVVNR6UEU2TM5WXJDHGUPX3Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A cooling neutron star crust after recurrent outbursts: Modelling the accretion outburst history of Aql X-1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Dany Page, Laura S. Ootes, Nathalie Degenaar, Rudy Wijnands","submitted_at":"2018-02-16T19:00:02Z","abstract_excerpt":"With our neutron star crust cooling code {\\tt NSCool} we track the thermal evolution of the neutron star in Aql X-1 over the full accretion outburst history from 1996 until 2015. For the first time, we model many outbursts (23 outbursts were detected) collectively and in great detail. This allows us to investigate the influence of previous outbursts on the internal temperature evolution and to test different neutron star crust cooling scenarios. Aql X-1 is an ideal test source for this purpose, because it shows frequent, short outbursts and thermally dominated quiescence spectra. The source go"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06081","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":"2026-05-18T00:19:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c9y1ZT/o414CSUmmViLqd+69+vi6g8jGg7bN8uzHVT9AmQBUawam7X4PYdFw1aPik23d94g/uS8SSexla09FAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:45:24.360502Z"},"content_sha256":"bcf2184fb3e8cd577d6cfc9ba64793d05fd382f23ac82d9b6bc9114c85077d8d","schema_version":"1.0","event_id":"sha256:bcf2184fb3e8cd577d6cfc9ba64793d05fd382f23ac82d9b6bc9114c85077d8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/bundle.json","state_url":"https://pith.science/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/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":"2026-06-03T09:45:24Z","links":{"resolver":"https://pith.science/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y","bundle":"https://pith.science/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/bundle.json","state":"https://pith.science/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VKTVVNR6UEU2TM5WXJDHGUPX3Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VKTVVNR6UEU2TM5WXJDHGUPX3Y","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":"aa0c3ada47f93dffd0828d364ad5516569be2b6b54accde4022c8e35a0114646","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-16T19:00:02Z","title_canon_sha256":"c83f2494fa726c7249a4f595d989258b2ff01f3ebb3dd253aff27c025eeafcca"},"schema_version":"1.0","source":{"id":"1802.06081","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06081","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06081v2","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06081","created_at":"2026-05-18T00:19:08Z"},{"alias_kind":"pith_short_12","alias_value":"VKTVVNR6UEU2","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VKTVVNR6UEU2TM5W","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VKTVVNR6","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:bcf2184fb3e8cd577d6cfc9ba64793d05fd382f23ac82d9b6bc9114c85077d8d","target":"graph","created_at":"2026-05-18T00:19:08Z","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":"With our neutron star crust cooling code {\\tt NSCool} we track the thermal evolution of the neutron star in Aql X-1 over the full accretion outburst history from 1996 until 2015. For the first time, we model many outbursts (23 outbursts were detected) collectively and in great detail. This allows us to investigate the influence of previous outbursts on the internal temperature evolution and to test different neutron star crust cooling scenarios. Aql X-1 is an ideal test source for this purpose, because it shows frequent, short outbursts and thermally dominated quiescence spectra. The source go","authors_text":"Dany Page, Laura S. Ootes, Nathalie Degenaar, Rudy Wijnands","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-16T19:00:02Z","title":"A cooling neutron star crust after recurrent outbursts: Modelling the accretion outburst history of Aql X-1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06081","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":"sha256:2109a2b9bda0b8b0ff37b119d7f8499d3c241d37acf55cd219d85955f01588b6","target":"record","created_at":"2026-05-18T00:19:08Z","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":"aa0c3ada47f93dffd0828d364ad5516569be2b6b54accde4022c8e35a0114646","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-02-16T19:00:02Z","title_canon_sha256":"c83f2494fa726c7249a4f595d989258b2ff01f3ebb3dd253aff27c025eeafcca"},"schema_version":"1.0","source":{"id":"1802.06081","kind":"arxiv","version":2}},"canonical_sha256":"aaa75ab63ea129a9b3b6ba467351f7de0e99554e4cdb22b2bb813c676534da44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aaa75ab63ea129a9b3b6ba467351f7de0e99554e4cdb22b2bb813c676534da44","first_computed_at":"2026-05-18T00:19:08.326275Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:08.326275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BxkaGNAEFRTh923tYxFv0LUEkExXTrC054CA+mIhc7i0OuCL/cFCKYEEnBd+gv6e1wlZrthzTNt1JhbuVEVGDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:08.326989Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.06081","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2109a2b9bda0b8b0ff37b119d7f8499d3c241d37acf55cd219d85955f01588b6","sha256:bcf2184fb3e8cd577d6cfc9ba64793d05fd382f23ac82d9b6bc9114c85077d8d"],"state_sha256":"4ff34e4bf101a28b5398d4572743349e7025e1dc6f5c731d561ddff479ac8f46"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nPAnyErIIxdbJ25cmS4oNHPnNYa0YO5Q2dMBdNNDwuK4HRxM/lG+CljM5fHuHlvdHcRVwXTTp8jBb46Clux2Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T09:45:24.362437Z","bundle_sha256":"59daa110ada510ead09b99de3059a553641c4460e34927e4b36d33bef87b9eca"}}