{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:MKSD2GUUKEWOMXB2NUJPDET63M","short_pith_number":"pith:MKSD2GUU","canonical_record":{"source":{"id":"2604.00101","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-03-31T18:20:02Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"title_canon_sha256":"377f9d7be5f155e403bcf1c36fae0313ce5fd3ac26a0e33fc52ea4ae639a60ae","abstract_canon_sha256":"93833016a9fc07b97faa42c43dfee419455c7e129059bf97f6968dd0e6a686e0"},"schema_version":"1.0"},"canonical_sha256":"62a43d1a94512ce65c3a6d12f1927edb32a4ab35fd1364d2e7ec71c56b28b1d9","source":{"kind":"arxiv","id":"2604.00101","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.00101","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"2604.00101v1","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.00101","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"MKSD2GUUKEWO","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_16","alias_value":"MKSD2GUUKEWOMXB2","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_8","alias_value":"MKSD2GUU","created_at":"2026-06-09T02:07:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:MKSD2GUUKEWOMXB2NUJPDET63M","target":"record","payload":{"canonical_record":{"source":{"id":"2604.00101","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-03-31T18:20:02Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"title_canon_sha256":"377f9d7be5f155e403bcf1c36fae0313ce5fd3ac26a0e33fc52ea4ae639a60ae","abstract_canon_sha256":"93833016a9fc07b97faa42c43dfee419455c7e129059bf97f6968dd0e6a686e0"},"schema_version":"1.0"},"canonical_sha256":"62a43d1a94512ce65c3a6d12f1927edb32a4ab35fd1364d2e7ec71c56b28b1d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-09T02:07:25.783989Z","signature_b64":"5ntqSI0QOQIdr9UO07Le7h+mdpxKpzngwNe4WrRfAo94KOSTuFAp9nF9fDn0W3inb4KgCIX1cZfwe76wrsLWBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62a43d1a94512ce65c3a6d12f1927edb32a4ab35fd1364d2e7ec71c56b28b1d9","last_reissued_at":"2026-06-09T02:07:25.783268Z","signature_status":"signed_v1","first_computed_at":"2026-06-09T02:07:25.783268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2604.00101","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":"2026-06-09T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IM2idR37iMNMPVucZYgK3Nzn8jqXHI1eMOr25drTU+TLoYopaQwtAm/Bu1d++dKXXcPmqupz+JbZ1kyhVcLUDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T19:47:16.184610Z"},"content_sha256":"bae0b239fa41e0bf59d06886860dc04b01ee334d745997cfaf529981698c7b6b","schema_version":"1.0","event_id":"sha256:bae0b239fa41e0bf59d06886860dc04b01ee334d745997cfaf529981698c7b6b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:MKSD2GUUKEWOMXB2NUJPDET63M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for unresolved massive black hole pairs through AGN photometric variability","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Fabio Rigamonti, Lorenzo Bertassi, Maria Charisi, Massimo Dotti, Stefano Covino","submitted_at":"2026-03-31T18:20:02Z","abstract_excerpt":"Since their discovery, AGN light curves are known to be intrinsically variable. In the optical/UV band, this variability is consistent with correlated or red noise and is particularly well described by the damped random walk (DRW) model. In this work, we evaluate the feasibility of a new method for identifying spatially unresolved couples of AGN through a fully Bayesian time-domain analysis of the observed light curves (LCs). More specifically, we check whether observed LCs are better described by a single DRW, which we interpret as emitted by a single massive black hole (MBH), or a pair of in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.00101","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/2604.00101/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":"2026-06-09T02:07:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uYAwdwJEEtAWodxEDTZcrWzPmq3RHyLe6GjgmAfjkHsOT1+XzBK9v7Y/vpU9zNi9fX9Qazr1i3w9lcENGKacCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T19:47:16.185010Z"},"content_sha256":"95a606f1538c4b45f2d48b4e6b6a772ca011bc2107d9c8ccd2cf429dd346877c","schema_version":"1.0","event_id":"sha256:95a606f1538c4b45f2d48b4e6b6a772ca011bc2107d9c8ccd2cf429dd346877c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MKSD2GUUKEWOMXB2NUJPDET63M/bundle.json","state_url":"https://pith.science/pith/MKSD2GUUKEWOMXB2NUJPDET63M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MKSD2GUUKEWOMXB2NUJPDET63M/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":"2026-07-04T19:47:16Z","links":{"resolver":"https://pith.science/pith/MKSD2GUUKEWOMXB2NUJPDET63M","bundle":"https://pith.science/pith/MKSD2GUUKEWOMXB2NUJPDET63M/bundle.json","state":"https://pith.science/pith/MKSD2GUUKEWOMXB2NUJPDET63M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MKSD2GUUKEWOMXB2NUJPDET63M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:MKSD2GUUKEWOMXB2NUJPDET63M","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":"93833016a9fc07b97faa42c43dfee419455c7e129059bf97f6968dd0e6a686e0","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-03-31T18:20:02Z","title_canon_sha256":"377f9d7be5f155e403bcf1c36fae0313ce5fd3ac26a0e33fc52ea4ae639a60ae"},"schema_version":"1.0","source":{"id":"2604.00101","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.00101","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"arxiv_version","alias_value":"2604.00101v1","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.00101","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_12","alias_value":"MKSD2GUUKEWO","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_16","alias_value":"MKSD2GUUKEWOMXB2","created_at":"2026-06-09T02:07:25Z"},{"alias_kind":"pith_short_8","alias_value":"MKSD2GUU","created_at":"2026-06-09T02:07:25Z"}],"graph_snapshots":[{"event_id":"sha256:95a606f1538c4b45f2d48b4e6b6a772ca011bc2107d9c8ccd2cf429dd346877c","target":"graph","created_at":"2026-06-09T02:07:25Z","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/2604.00101/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Since their discovery, AGN light curves are known to be intrinsically variable. In the optical/UV band, this variability is consistent with correlated or red noise and is particularly well described by the damped random walk (DRW) model. In this work, we evaluate the feasibility of a new method for identifying spatially unresolved couples of AGN through a fully Bayesian time-domain analysis of the observed light curves (LCs). More specifically, we check whether observed LCs are better described by a single DRW, which we interpret as emitted by a single massive black hole (MBH), or a pair of in","authors_text":"Fabio Rigamonti, Lorenzo Bertassi, Maria Charisi, Massimo Dotti, Stefano Covino","cross_cats":["astro-ph.CO","astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-03-31T18:20:02Z","title":"Searching for unresolved massive black hole pairs through AGN photometric variability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.00101","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:bae0b239fa41e0bf59d06886860dc04b01ee334d745997cfaf529981698c7b6b","target":"record","created_at":"2026-06-09T02:07:25Z","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":"93833016a9fc07b97faa42c43dfee419455c7e129059bf97f6968dd0e6a686e0","cross_cats_sorted":["astro-ph.CO","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-03-31T18:20:02Z","title_canon_sha256":"377f9d7be5f155e403bcf1c36fae0313ce5fd3ac26a0e33fc52ea4ae639a60ae"},"schema_version":"1.0","source":{"id":"2604.00101","kind":"arxiv","version":1}},"canonical_sha256":"62a43d1a94512ce65c3a6d12f1927edb32a4ab35fd1364d2e7ec71c56b28b1d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62a43d1a94512ce65c3a6d12f1927edb32a4ab35fd1364d2e7ec71c56b28b1d9","first_computed_at":"2026-06-09T02:07:25.783268Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-09T02:07:25.783268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5ntqSI0QOQIdr9UO07Le7h+mdpxKpzngwNe4WrRfAo94KOSTuFAp9nF9fDn0W3inb4KgCIX1cZfwe76wrsLWBQ==","signature_status":"signed_v1","signed_at":"2026-06-09T02:07:25.783989Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.00101","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bae0b239fa41e0bf59d06886860dc04b01ee334d745997cfaf529981698c7b6b","sha256:95a606f1538c4b45f2d48b4e6b6a772ca011bc2107d9c8ccd2cf429dd346877c"],"state_sha256":"ba0237f05e034334e793ee1553c1c9bae6e2512699c9e2146ecd756cd60bd150"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S44S6UN35+syVVkOX9/hHqyIlYK9yztU5J5K7T92YwicOAV6IKViKlZYTGCwjAkKtCz9FYj1xAUf6CRpAmBNDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T19:47:16.187406Z","bundle_sha256":"e33065cb91e23a25566bb59eb6c42e0ad1e2c004c0565899f9c61e030644a485"}}