{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:24IS2X62FOND5A7M7OHOE3VPK3","short_pith_number":"pith:24IS2X62","canonical_record":{"source":{"id":"1404.5108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-21T04:22:15Z","cross_cats_sorted":[],"title_canon_sha256":"ee3b2b9c97238955ad32b400594b1f645973fccdc9701e6e36c0fb438911be38","abstract_canon_sha256":"4a17a74fd8a818a077dcd1fc7edcb75f046012b653338ae0f718f057b26970ed"},"schema_version":"1.0"},"canonical_sha256":"d7112d5fda2b9a3e83ecfb8ee26eaf56db20d58fd6d217f2dcdd852facc22cff","source":{"kind":"arxiv","id":"1404.5108","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5108","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5108v1","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5108","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"pith_short_12","alias_value":"24IS2X62FOND","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"24IS2X62FOND5A7M","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"24IS2X62","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:24IS2X62FOND5A7M7OHOE3VPK3","target":"record","payload":{"canonical_record":{"source":{"id":"1404.5108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-21T04:22:15Z","cross_cats_sorted":[],"title_canon_sha256":"ee3b2b9c97238955ad32b400594b1f645973fccdc9701e6e36c0fb438911be38","abstract_canon_sha256":"4a17a74fd8a818a077dcd1fc7edcb75f046012b653338ae0f718f057b26970ed"},"schema_version":"1.0"},"canonical_sha256":"d7112d5fda2b9a3e83ecfb8ee26eaf56db20d58fd6d217f2dcdd852facc22cff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:26.988763Z","signature_b64":"FMXcF2sn1i5ErVNXJULSvBsiUeJ2CJCC5+KgBsXBvpj3hQ8s5L8K+izFMidBV2jHM28p/6aqJd30zhg1KzcICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7112d5fda2b9a3e83ecfb8ee26eaf56db20d58fd6d217f2dcdd852facc22cff","last_reissued_at":"2026-05-18T01:43:26.988072Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:26.988072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.5108","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":"2026-05-18T01:43:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W0m++n3kx7wKzpaD9AGDJB7BMiNbA76+goaX1a0djyPLfJqAlO/PXGslOOLXP42lI71yCyIWvvsadga0nA0FDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:25:55.777104Z"},"content_sha256":"7f2b032869db5b2039579420e212807082ee25b295dd1361f09159319c1b8c48","schema_version":"1.0","event_id":"sha256:7f2b032869db5b2039579420e212807082ee25b295dd1361f09159319c1b8c48"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:24IS2X62FOND5A7M7OHOE3VPK3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracking the Evolution of QPO in RE J1034+396 Using the Hilbert-Huang Transform","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Chin-Ping Hu, Ting-Chang Yang, Yi Chou, Yi-Hao Su","submitted_at":"2014-04-21T04:22:15Z","abstract_excerpt":"RE J1034+396, a narrow-line Seyfert-1 active galactic nucleus (AGN), is the first example of AGNs that exhibited a nearly coherent quasi-periodic oscillation (QPO) for the data collected by XMM-Newton in 2007. The spectral behaviors and timing properties of the QPO have been studied since its discovery. We present an analysis of the QPO in RE J1034+396 based on the Hilbert-Huang transform (HHT). Comparing other time-frequency analysis methods, the Hilbert spectrum reveals the variation of the QPO period in great detail. Furthermore, the empirical mode decomposition provides band-pass filtered "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5108","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":"2026-05-18T01:43:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NhYoapjwg8GbljOFJRSKVv5CUMusguEmAA/cQiXNnd+IEJ0fAiNnYcf7TEIEiRPaTCAkp4smBF5PAfjkw6s5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:25:55.777487Z"},"content_sha256":"4499957d18cab3e223c49121f3c2d4c981ca049679f2c1ba4b18bc95cf7e7a20","schema_version":"1.0","event_id":"sha256:4499957d18cab3e223c49121f3c2d4c981ca049679f2c1ba4b18bc95cf7e7a20"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24IS2X62FOND5A7M7OHOE3VPK3/bundle.json","state_url":"https://pith.science/pith/24IS2X62FOND5A7M7OHOE3VPK3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24IS2X62FOND5A7M7OHOE3VPK3/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":"2026-06-04T01:25:55Z","links":{"resolver":"https://pith.science/pith/24IS2X62FOND5A7M7OHOE3VPK3","bundle":"https://pith.science/pith/24IS2X62FOND5A7M7OHOE3VPK3/bundle.json","state":"https://pith.science/pith/24IS2X62FOND5A7M7OHOE3VPK3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24IS2X62FOND5A7M7OHOE3VPK3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:24IS2X62FOND5A7M7OHOE3VPK3","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":"4a17a74fd8a818a077dcd1fc7edcb75f046012b653338ae0f718f057b26970ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-21T04:22:15Z","title_canon_sha256":"ee3b2b9c97238955ad32b400594b1f645973fccdc9701e6e36c0fb438911be38"},"schema_version":"1.0","source":{"id":"1404.5108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.5108","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"arxiv_version","alias_value":"1404.5108v1","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.5108","created_at":"2026-05-18T01:43:26Z"},{"alias_kind":"pith_short_12","alias_value":"24IS2X62FOND","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"24IS2X62FOND5A7M","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"24IS2X62","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:4499957d18cab3e223c49121f3c2d4c981ca049679f2c1ba4b18bc95cf7e7a20","target":"graph","created_at":"2026-05-18T01:43:26Z","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":"RE J1034+396, a narrow-line Seyfert-1 active galactic nucleus (AGN), is the first example of AGNs that exhibited a nearly coherent quasi-periodic oscillation (QPO) for the data collected by XMM-Newton in 2007. The spectral behaviors and timing properties of the QPO have been studied since its discovery. We present an analysis of the QPO in RE J1034+396 based on the Hilbert-Huang transform (HHT). Comparing other time-frequency analysis methods, the Hilbert spectrum reveals the variation of the QPO period in great detail. Furthermore, the empirical mode decomposition provides band-pass filtered ","authors_text":"Chin-Ping Hu, Ting-Chang Yang, Yi Chou, Yi-Hao Su","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-21T04:22:15Z","title":"Tracking the Evolution of QPO in RE J1034+396 Using the Hilbert-Huang Transform"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.5108","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":"sha256:7f2b032869db5b2039579420e212807082ee25b295dd1361f09159319c1b8c48","target":"record","created_at":"2026-05-18T01:43:26Z","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":"4a17a74fd8a818a077dcd1fc7edcb75f046012b653338ae0f718f057b26970ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2014-04-21T04:22:15Z","title_canon_sha256":"ee3b2b9c97238955ad32b400594b1f645973fccdc9701e6e36c0fb438911be38"},"schema_version":"1.0","source":{"id":"1404.5108","kind":"arxiv","version":1}},"canonical_sha256":"d7112d5fda2b9a3e83ecfb8ee26eaf56db20d58fd6d217f2dcdd852facc22cff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7112d5fda2b9a3e83ecfb8ee26eaf56db20d58fd6d217f2dcdd852facc22cff","first_computed_at":"2026-05-18T01:43:26.988072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:26.988072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FMXcF2sn1i5ErVNXJULSvBsiUeJ2CJCC5+KgBsXBvpj3hQ8s5L8K+izFMidBV2jHM28p/6aqJd30zhg1KzcICQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:26.988763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.5108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7f2b032869db5b2039579420e212807082ee25b295dd1361f09159319c1b8c48","sha256:4499957d18cab3e223c49121f3c2d4c981ca049679f2c1ba4b18bc95cf7e7a20"],"state_sha256":"ecdaf8b4dcdc426039bf07c4cfa0bc03183325f441b3f4cd171c150eb190faed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bH93gloJcN0A91V3ox/cRpPgJ6vxmCLiwIcUwUZkxzKefSlkaD1llLmmXhN9YidsrNZ2/Zhc3N18p+coJqpVCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T01:25:55.780406Z","bundle_sha256":"3f2ead375e9cc8c0c7a4bc3a4d7ea89abc0ecc00173233838226e85f7a893334"}}