{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5YHTPO4YKOMW5S7OQ7S5MROFUO","short_pith_number":"pith:5YHTPO4Y","canonical_record":{"source":{"id":"1403.2385","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-03-10T20:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"00427c4bfdccf69df551248ac85f14487451b658b04361ec767244198d1c6fde","abstract_canon_sha256":"df1c769ea352beaf7a4a84a2ba30f504d75e5a6f1e52fcb957462e4a5bfdb32c"},"schema_version":"1.0"},"canonical_sha256":"ee0f37bb9853996ecbee87e5d645c5a388b640a74f60ce5ed9d54317e0434216","source":{"kind":"arxiv","id":"1403.2385","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2385","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2385v2","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2385","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"pith_short_12","alias_value":"5YHTPO4YKOMW","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"5YHTPO4YKOMW5S7O","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"5YHTPO4Y","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5YHTPO4YKOMW5S7OQ7S5MROFUO","target":"record","payload":{"canonical_record":{"source":{"id":"1403.2385","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-03-10T20:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"00427c4bfdccf69df551248ac85f14487451b658b04361ec767244198d1c6fde","abstract_canon_sha256":"df1c769ea352beaf7a4a84a2ba30f504d75e5a6f1e52fcb957462e4a5bfdb32c"},"schema_version":"1.0"},"canonical_sha256":"ee0f37bb9853996ecbee87e5d645c5a388b640a74f60ce5ed9d54317e0434216","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:44:09.310065Z","signature_b64":"8ghe4/JId+9RcobTrGzBw5t3Jt6nikMQoXQzNEdcIb8g48mIirGFp/DK6GkH9Bck6b+OVUrO819wn7m5qMNqCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee0f37bb9853996ecbee87e5d645c5a388b640a74f60ce5ed9d54317e0434216","last_reissued_at":"2026-05-18T01:44:09.309404Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:44:09.309404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.2385","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":"2026-05-18T01:44:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bS9EVNhjXQA/wt9PlYTpByIbAeJT46Wr1mX8OWSw5tw1eds+94AO9Xf2VxwXQgDlszRML5X8UwNt471A39MZAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:55:08.537401Z"},"content_sha256":"52e2d570ce12f60ca90dac8972a13a34c04a1acaf8ba8fad2e0ce82f2c6faadf","schema_version":"1.0","event_id":"sha256:52e2d570ce12f60ca90dac8972a13a34c04a1acaf8ba8fad2e0ce82f2c6faadf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5YHTPO4YKOMW5S7OQ7S5MROFUO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the Crust of the Neutron Star in EXO 0748-676","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Cumming, E.F. Brown, E.M. Cackett, J. Homan, J.M. Miller, M.T. Wolff, N. Degenaar, P.G. Jonker, R. Wijnands, Z. Medin","submitted_at":"2014-03-10T20:00:32Z","abstract_excerpt":"X-ray observations of quiescent X-ray binaries have the potential to provide insight into the structure and the composition of neutron stars. EXO 0748-676 had been actively accreting for over 24 yr before its outburst ceased in late 2008. Subsequent X-ray monitoring revealed a gradual decay of the quiescent thermal emission that can be attributed to cooling of the accretion-heated neutron star crust. In this work, we report on new Chandra and Swift observations that extend the quiescent monitoring to ~5 yr post-outburst. We find that the neutron star temperature remained at ~117 eV between 200"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2385","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":"2026-05-18T01:44:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c70yupDSitWZinp4xdO8gnn61kajIs3XkC3ImapnNlpFkOwr44rj4uw7Tgvm2pQgGKSg+f23+ReDsuG0uyoOAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:55:08.537951Z"},"content_sha256":"75b6a52cd76369c91af3fe88c0090a0bf9618b109c775cb632f6276c9c2a8c5d","schema_version":"1.0","event_id":"sha256:75b6a52cd76369c91af3fe88c0090a0bf9618b109c775cb632f6276c9c2a8c5d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/bundle.json","state_url":"https://pith.science/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/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":"2026-05-24T15:55:08Z","links":{"resolver":"https://pith.science/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO","bundle":"https://pith.science/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/bundle.json","state":"https://pith.science/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5YHTPO4YKOMW5S7OQ7S5MROFUO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5YHTPO4YKOMW5S7OQ7S5MROFUO","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":"df1c769ea352beaf7a4a84a2ba30f504d75e5a6f1e52fcb957462e4a5bfdb32c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-03-10T20:00:32Z","title_canon_sha256":"00427c4bfdccf69df551248ac85f14487451b658b04361ec767244198d1c6fde"},"schema_version":"1.0","source":{"id":"1403.2385","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2385","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2385v2","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2385","created_at":"2026-05-18T01:44:09Z"},{"alias_kind":"pith_short_12","alias_value":"5YHTPO4YKOMW","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"5YHTPO4YKOMW5S7O","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"5YHTPO4Y","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:75b6a52cd76369c91af3fe88c0090a0bf9618b109c775cb632f6276c9c2a8c5d","target":"graph","created_at":"2026-05-18T01:44:09Z","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":"X-ray observations of quiescent X-ray binaries have the potential to provide insight into the structure and the composition of neutron stars. EXO 0748-676 had been actively accreting for over 24 yr before its outburst ceased in late 2008. Subsequent X-ray monitoring revealed a gradual decay of the quiescent thermal emission that can be attributed to cooling of the accretion-heated neutron star crust. In this work, we report on new Chandra and Swift observations that extend the quiescent monitoring to ~5 yr post-outburst. We find that the neutron star temperature remained at ~117 eV between 200","authors_text":"A. Cumming, E.F. Brown, E.M. Cackett, J. Homan, J.M. Miller, M.T. Wolff, N. Degenaar, P.G. Jonker, R. Wijnands, Z. Medin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-03-10T20:00:32Z","title":"Probing the Crust of the Neutron Star in EXO 0748-676"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2385","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":"sha256:52e2d570ce12f60ca90dac8972a13a34c04a1acaf8ba8fad2e0ce82f2c6faadf","target":"record","created_at":"2026-05-18T01:44:09Z","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":"df1c769ea352beaf7a4a84a2ba30f504d75e5a6f1e52fcb957462e4a5bfdb32c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-03-10T20:00:32Z","title_canon_sha256":"00427c4bfdccf69df551248ac85f14487451b658b04361ec767244198d1c6fde"},"schema_version":"1.0","source":{"id":"1403.2385","kind":"arxiv","version":2}},"canonical_sha256":"ee0f37bb9853996ecbee87e5d645c5a388b640a74f60ce5ed9d54317e0434216","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee0f37bb9853996ecbee87e5d645c5a388b640a74f60ce5ed9d54317e0434216","first_computed_at":"2026-05-18T01:44:09.309404Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:09.309404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8ghe4/JId+9RcobTrGzBw5t3Jt6nikMQoXQzNEdcIb8g48mIirGFp/DK6GkH9Bck6b+OVUrO819wn7m5qMNqCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:09.310065Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.2385","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52e2d570ce12f60ca90dac8972a13a34c04a1acaf8ba8fad2e0ce82f2c6faadf","sha256:75b6a52cd76369c91af3fe88c0090a0bf9618b109c775cb632f6276c9c2a8c5d"],"state_sha256":"cb153e631296e71cb95345c268cb7aa7a2728a85ce6e9f596affded09e14add1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AynGkSsCjaOrsUGHXU/zJTVcBY0fsnKtJyxNCJ64MedIBQi/7ejFeT7tnlbQs7oJtUIZkk+egnnDpKVIYT7NAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T15:55:08.541299Z","bundle_sha256":"37fef7b2301d20f72d29da3d6614d05e674a6bea12209410190ab147cf6b545d"}}