{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:JCQWLF4BYTF4YTAAKW3H2V22QB","short_pith_number":"pith:JCQWLF4B","canonical_record":{"source":{"id":"2606.28499","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-26T18:00:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2791f5888eba0cb7abdfc4bbef539d09b9eb56fc95e09dafe16e6215826dbcbc","abstract_canon_sha256":"662ee000309d6167d6332e0c46d3029e74d621a010d2c002f15b9c2cfe724fc0"},"schema_version":"1.0"},"canonical_sha256":"48a1659781c4cbcc4c0055b67d575a8067269ec37b5107c04ac74a08227f25b8","source":{"kind":"arxiv","id":"2606.28499","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.28499","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"arxiv_version","alias_value":"2606.28499v1","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.28499","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_12","alias_value":"JCQWLF4BYTF4","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_16","alias_value":"JCQWLF4BYTF4YTAA","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_8","alias_value":"JCQWLF4B","created_at":"2026-06-30T00:15:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:JCQWLF4BYTF4YTAAKW3H2V22QB","target":"record","payload":{"canonical_record":{"source":{"id":"2606.28499","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-26T18:00:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2791f5888eba0cb7abdfc4bbef539d09b9eb56fc95e09dafe16e6215826dbcbc","abstract_canon_sha256":"662ee000309d6167d6332e0c46d3029e74d621a010d2c002f15b9c2cfe724fc0"},"schema_version":"1.0"},"canonical_sha256":"48a1659781c4cbcc4c0055b67d575a8067269ec37b5107c04ac74a08227f25b8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-30T00:15:16.009955Z","signature_b64":"DXHccj1b4e9zIZfOjwYYt2PsGu3vE3WFiwJ4gMsdwjK/3ypZcJaFNn8uRIelRbdFbk0rlgIfLiUzUl625uX0CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48a1659781c4cbcc4c0055b67d575a8067269ec37b5107c04ac74a08227f25b8","last_reissued_at":"2026-06-30T00:15:16.009544Z","signature_status":"signed_v1","first_computed_at":"2026-06-30T00:15:16.009544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.28499","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":"2026-06-30T00:15:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2VwK1Pl/PKrofDRnjuaIgFIiTXzUPN20HsFo9c853z6SpEyyi72CAxDdlrl5jHPY6RXA7NQeGln3eUG6PKR3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T08:11:59.572424Z"},"content_sha256":"1e890024c35f4d7cf7d6d65216dffee3b4398ced3befd4924caf6778445a8cee","schema_version":"1.0","event_id":"sha256:1e890024c35f4d7cf7d6d65216dffee3b4398ced3befd4924caf6778445a8cee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:JCQWLF4BYTF4YTAAKW3H2V22QB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stochastic Variability of Binary Accretion","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Akhil Nair, Jonathan Zrake","submitted_at":"2026-06-26T18:00:12Z","abstract_excerpt":"We measure the power spectral density (PSD) of the accretion rate time series in an unequal mass (q = 0.2) binary surrounded by a circumbinary gas disk, using very high-resolution 2D hydrodynamics simulations. Our aim is to identify new signposts of supermassive black hole (SMBH) binaries in active galactic nuclei (AGN), based on the shape of the continuum PSD, to complement well-studied line features in the PSD (periodicities). We find that the continuum PSD is a broken power-law, transitioning from flat (white noise) to a slope of -4 at a break frequency generically ~5 times the binary orbit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.28499","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/2606.28499/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":"2026-06-30T00:15:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VLQvkvQ3rn0suKSZ+jh8AAnttRORhlWDfZEU4UXM84AUuNjgmOQRdaYtmMt0nXGf22aMfWhE6Yhsw2C0lxGdAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-30T08:11:59.572812Z"},"content_sha256":"f88e28aa1664fc24fc8a6362c63a0b2bdfd87815df9ef5730a66a52611d1cc29","schema_version":"1.0","event_id":"sha256:f88e28aa1664fc24fc8a6362c63a0b2bdfd87815df9ef5730a66a52611d1cc29"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/bundle.json","state_url":"https://pith.science/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/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":"2026-06-30T08:11:59Z","links":{"resolver":"https://pith.science/pith/JCQWLF4BYTF4YTAAKW3H2V22QB","bundle":"https://pith.science/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/bundle.json","state":"https://pith.science/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JCQWLF4BYTF4YTAAKW3H2V22QB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:JCQWLF4BYTF4YTAAKW3H2V22QB","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":"662ee000309d6167d6332e0c46d3029e74d621a010d2c002f15b9c2cfe724fc0","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-26T18:00:12Z","title_canon_sha256":"2791f5888eba0cb7abdfc4bbef539d09b9eb56fc95e09dafe16e6215826dbcbc"},"schema_version":"1.0","source":{"id":"2606.28499","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.28499","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"arxiv_version","alias_value":"2606.28499v1","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.28499","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_12","alias_value":"JCQWLF4BYTF4","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_16","alias_value":"JCQWLF4BYTF4YTAA","created_at":"2026-06-30T00:15:16Z"},{"alias_kind":"pith_short_8","alias_value":"JCQWLF4B","created_at":"2026-06-30T00:15:16Z"}],"graph_snapshots":[{"event_id":"sha256:f88e28aa1664fc24fc8a6362c63a0b2bdfd87815df9ef5730a66a52611d1cc29","target":"graph","created_at":"2026-06-30T00:15:16Z","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/2606.28499/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We measure the power spectral density (PSD) of the accretion rate time series in an unequal mass (q = 0.2) binary surrounded by a circumbinary gas disk, using very high-resolution 2D hydrodynamics simulations. Our aim is to identify new signposts of supermassive black hole (SMBH) binaries in active galactic nuclei (AGN), based on the shape of the continuum PSD, to complement well-studied line features in the PSD (periodicities). We find that the continuum PSD is a broken power-law, transitioning from flat (white noise) to a slope of -4 at a break frequency generically ~5 times the binary orbit","authors_text":"Akhil Nair, Jonathan Zrake","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-26T18:00:12Z","title":"Stochastic Variability of Binary Accretion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.28499","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":"sha256:1e890024c35f4d7cf7d6d65216dffee3b4398ced3befd4924caf6778445a8cee","target":"record","created_at":"2026-06-30T00:15:16Z","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":"662ee000309d6167d6332e0c46d3029e74d621a010d2c002f15b9c2cfe724fc0","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-26T18:00:12Z","title_canon_sha256":"2791f5888eba0cb7abdfc4bbef539d09b9eb56fc95e09dafe16e6215826dbcbc"},"schema_version":"1.0","source":{"id":"2606.28499","kind":"arxiv","version":1}},"canonical_sha256":"48a1659781c4cbcc4c0055b67d575a8067269ec37b5107c04ac74a08227f25b8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48a1659781c4cbcc4c0055b67d575a8067269ec37b5107c04ac74a08227f25b8","first_computed_at":"2026-06-30T00:15:16.009544Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-30T00:15:16.009544Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DXHccj1b4e9zIZfOjwYYt2PsGu3vE3WFiwJ4gMsdwjK/3ypZcJaFNn8uRIelRbdFbk0rlgIfLiUzUl625uX0CA==","signature_status":"signed_v1","signed_at":"2026-06-30T00:15:16.009955Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.28499","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e890024c35f4d7cf7d6d65216dffee3b4398ced3befd4924caf6778445a8cee","sha256:f88e28aa1664fc24fc8a6362c63a0b2bdfd87815df9ef5730a66a52611d1cc29"],"state_sha256":"45483f4ffb0a9de1a724f86ef523d1b05905badbca1ad870b22b874f7a898ef8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tatyAFJtemUgGuvTkFsE9/ZnCvna7Idu44GDlV366T1N8nPr00o5DyvLeBEkKidnrryiO7J108wzHdYqJ1gOCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-30T08:11:59.574813Z","bundle_sha256":"3ee287cf6a477c1ce48094c05f510be5480660ea2cc3f0492359f4953d497706"}}