{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OL4ZRQZBOSHFRGHQQBM46DU33I","short_pith_number":"pith:OL4ZRQZB","canonical_record":{"source":{"id":"1912.05708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-12-12T00:04:44Z","cross_cats_sorted":[],"title_canon_sha256":"2f33313865c9aa24f1d5b17e53d3973a561fdcba570b61dfa369ee10b3a2d151","abstract_canon_sha256":"09d910868f96dd45a88f08fd5cf365329bf2e732b3fd4d3c57ed6e673496fbc2"},"schema_version":"1.0"},"canonical_sha256":"72f998c321748e5898f08059cf0e9bda35e55e177e0568cfb5eae2eac8894935","source":{"kind":"arxiv","id":"1912.05708","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.05708","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"arxiv_version","alias_value":"1912.05708v1","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.05708","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_12","alias_value":"OL4ZRQZBOSHF","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_16","alias_value":"OL4ZRQZBOSHFRGHQ","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_8","alias_value":"OL4ZRQZB","created_at":"2026-07-05T00:26:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OL4ZRQZBOSHFRGHQQBM46DU33I","target":"record","payload":{"canonical_record":{"source":{"id":"1912.05708","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-12-12T00:04:44Z","cross_cats_sorted":[],"title_canon_sha256":"2f33313865c9aa24f1d5b17e53d3973a561fdcba570b61dfa369ee10b3a2d151","abstract_canon_sha256":"09d910868f96dd45a88f08fd5cf365329bf2e732b3fd4d3c57ed6e673496fbc2"},"schema_version":"1.0"},"canonical_sha256":"72f998c321748e5898f08059cf0e9bda35e55e177e0568cfb5eae2eac8894935","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:26:45.354912Z","signature_b64":"rBDnR9/ov5cevwMNk3c/4SahUu8HjRFw4MrXVjVdQOuCGS4EG/gcuSSXWpC4GbIGDEozUpoq3v4eAqxcQwVjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72f998c321748e5898f08059cf0e9bda35e55e177e0568cfb5eae2eac8894935","last_reissued_at":"2026-07-05T00:26:45.354443Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:26:45.354443Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.05708","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":"2026-07-05T00:26:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K4oqsnzHP++LBsy86HCTnPiUIku436mj+B4rHIIt/B7vKYdn1fMGd6FA6WPIslUunj8otv/rL2fB62MIeedDAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:58:17.679683Z"},"content_sha256":"a759fcc3002fbe41e36ee50b3fc81b4592133fb25e64b2811e655827a0d952fa","schema_version":"1.0","event_id":"sha256:a759fcc3002fbe41e36ee50b3fc81b4592133fb25e64b2811e655827a0d952fa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OL4ZRQZBOSHFRGHQQBM46DU33I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NICER X-ray Observations of Seven Nearby Rotation-Powered Millisecond Pulsars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. Malacaria, D. Chakrabarty, G. K. Jaisawal, G. Theureau, I. Cognard, J. S. Deneva, K. C. Gendreau, K. S. Wood, L. Guillemot, M. C. Miller, M. Kerr, M. T. Wolff, N. A. Webb, P. Bult, P. S. Ray, S. Bogdanov, S. Guillot, S. Ransom, T. E. Strohmayer, W. C. G. Ho, Z. Arzoumanian","submitted_at":"2019-12-12T00:04:44Z","abstract_excerpt":"NICER observed several rotation-powered millisecond pulsars to search for or confirm the presence of X-ray pulsations. When broad and sine-like, these pulsations may indicate thermal emission from hot polar caps at the magnetic poles on the neutron star surface. We report confident detections ($\\ge4.7\\sigma$ after background filtering) of X-ray pulsations for five of the seven pulsars in our target sample: PSR J0614-3329, PSR J0636+5129, PSR J0751+1807, PSR J1012+5307, and PSR J2241-5236, while PSR J1552+5437 and PSR J1744-1134 remain undetected. Of those, only PSR J0751+1807 and PSR J1012+530"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.05708","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1912.05708/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:26:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TsvOZ4gW4QGKpofAey+KyrmTMjcIOrijkqBEPhuc7S7qsKLRpkjQvWAgLR9Xl9SNgbnWX4qdaPq5pxYGj25UBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:58:17.680633Z"},"content_sha256":"1e5850e46be3a1359cbd663ebdb16a2d9b4cd86b485d42f700a1e0e78f7603a8","schema_version":"1.0","event_id":"sha256:1e5850e46be3a1359cbd663ebdb16a2d9b4cd86b485d42f700a1e0e78f7603a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/bundle.json","state_url":"https://pith.science/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/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":"2026-08-04T06:58:17Z","links":{"resolver":"https://pith.science/pith/OL4ZRQZBOSHFRGHQQBM46DU33I","bundle":"https://pith.science/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/bundle.json","state":"https://pith.science/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OL4ZRQZBOSHFRGHQQBM46DU33I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OL4ZRQZBOSHFRGHQQBM46DU33I","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":"09d910868f96dd45a88f08fd5cf365329bf2e732b3fd4d3c57ed6e673496fbc2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-12-12T00:04:44Z","title_canon_sha256":"2f33313865c9aa24f1d5b17e53d3973a561fdcba570b61dfa369ee10b3a2d151"},"schema_version":"1.0","source":{"id":"1912.05708","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.05708","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"arxiv_version","alias_value":"1912.05708v1","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.05708","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_12","alias_value":"OL4ZRQZBOSHF","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_16","alias_value":"OL4ZRQZBOSHFRGHQ","created_at":"2026-07-05T00:26:45Z"},{"alias_kind":"pith_short_8","alias_value":"OL4ZRQZB","created_at":"2026-07-05T00:26:45Z"}],"graph_snapshots":[{"event_id":"sha256:1e5850e46be3a1359cbd663ebdb16a2d9b4cd86b485d42f700a1e0e78f7603a8","target":"graph","created_at":"2026-07-05T00:26:45Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1912.05708/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"NICER observed several rotation-powered millisecond pulsars to search for or confirm the presence of X-ray pulsations. When broad and sine-like, these pulsations may indicate thermal emission from hot polar caps at the magnetic poles on the neutron star surface. We report confident detections ($\\ge4.7\\sigma$ after background filtering) of X-ray pulsations for five of the seven pulsars in our target sample: PSR J0614-3329, PSR J0636+5129, PSR J0751+1807, PSR J1012+5307, and PSR J2241-5236, while PSR J1552+5437 and PSR J1744-1134 remain undetected. Of those, only PSR J0751+1807 and PSR J1012+530","authors_text":"C. Malacaria, D. Chakrabarty, G. K. Jaisawal, G. Theureau, I. Cognard, J. S. Deneva, K. C. Gendreau, K. S. Wood, L. Guillemot, M. C. Miller, M. Kerr, M. T. Wolff, N. A. Webb, P. Bult, P. S. Ray, S. Bogdanov, S. Guillot, S. Ransom, T. E. Strohmayer, W. C. G. Ho, Z. Arzoumanian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-12-12T00:04:44Z","title":"NICER X-ray Observations of Seven Nearby Rotation-Powered Millisecond Pulsars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.05708","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:a759fcc3002fbe41e36ee50b3fc81b4592133fb25e64b2811e655827a0d952fa","target":"record","created_at":"2026-07-05T00:26:45Z","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":"09d910868f96dd45a88f08fd5cf365329bf2e732b3fd4d3c57ed6e673496fbc2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-12-12T00:04:44Z","title_canon_sha256":"2f33313865c9aa24f1d5b17e53d3973a561fdcba570b61dfa369ee10b3a2d151"},"schema_version":"1.0","source":{"id":"1912.05708","kind":"arxiv","version":1}},"canonical_sha256":"72f998c321748e5898f08059cf0e9bda35e55e177e0568cfb5eae2eac8894935","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72f998c321748e5898f08059cf0e9bda35e55e177e0568cfb5eae2eac8894935","first_computed_at":"2026-07-05T00:26:45.354443Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:26:45.354443Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rBDnR9/ov5cevwMNk3c/4SahUu8HjRFw4MrXVjVdQOuCGS4EG/gcuSSXWpC4GbIGDEozUpoq3v4eAqxcQwVjDg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:26:45.354912Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.05708","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a759fcc3002fbe41e36ee50b3fc81b4592133fb25e64b2811e655827a0d952fa","sha256:1e5850e46be3a1359cbd663ebdb16a2d9b4cd86b485d42f700a1e0e78f7603a8"],"state_sha256":"dcf387a2cd1265ed5c2950cc807d6ffd1e758e74994d3bea6fe898b9a6006c89"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nk1+zZNW5LkNHod9K2iSWHWQDp3MWtGT/YlcLI/VvbVCTobD+9D2oU3f7J497cmXU2nMRxnGv4LuRNm6BC3RAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T06:58:17.686474Z","bundle_sha256":"5c7fd08b6b4fdf23045fdd33efec924206f17e68b95d5516bd2a3d816aad19f3"}}