{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2","short_pith_number":"pith:OG4JA6UK","canonical_record":{"source":{"id":"2006.03065","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-06-04T18:00:02Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"32f9d076049f3a39706a8506732cbe6beebafc77ebfad2d27a7059c9db60b9c3","abstract_canon_sha256":"6e4c8af4be175c78e50ca47ff0b35add81b77cbbf8be0e4d6555cb96d2fb247e"},"schema_version":"1.0"},"canonical_sha256":"71b8907a8a57b3f71e16cf325127f61eab3f2c6e6218457c764d08d479874e4c","source":{"kind":"arxiv","id":"2006.03065","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.03065","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"arxiv_version","alias_value":"2006.03065v2","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.03065","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_12","alias_value":"OG4JA6UKK6Z7","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_16","alias_value":"OG4JA6UKK6Z7OHQW","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_8","alias_value":"OG4JA6UK","created_at":"2026-07-05T01:59:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2","target":"record","payload":{"canonical_record":{"source":{"id":"2006.03065","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-06-04T18:00:02Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"32f9d076049f3a39706a8506732cbe6beebafc77ebfad2d27a7059c9db60b9c3","abstract_canon_sha256":"6e4c8af4be175c78e50ca47ff0b35add81b77cbbf8be0e4d6555cb96d2fb247e"},"schema_version":"1.0"},"canonical_sha256":"71b8907a8a57b3f71e16cf325127f61eab3f2c6e6218457c764d08d479874e4c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:59:12.426688Z","signature_b64":"FynQR8VdId+all3piSZcB3ZDFoyaJ1lwMsR6hITeAPQXabNXfeOUHSZDaIcgvtdUH29bIzr0PTWY+jciY7SICQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"71b8907a8a57b3f71e16cf325127f61eab3f2c6e6218457c764d08d479874e4c","last_reissued_at":"2026-07-05T01:59:12.426266Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:59:12.426266Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.03065","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":"2026-07-05T01:59:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7ErlDH8clHf+wIC+MBik9+DKh12QN2jw7UJSqUzJwR/2av5wTvLe5EcI0BDYnuzhD/imzfQWamv+rMDpV8vPDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:36:10.891860Z"},"content_sha256":"7695f7b60003ef329f272e04db6a4b9e829b868c3e55d01a95b6be0c964789b3","schema_version":"1.0","event_id":"sha256:7695f7b60003ef329f272e04db6a4b9e829b868c3e55d01a95b6be0c964789b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massive black hole merger rates: the effect of kpc separation wandering and supernova feedback","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"astro-ph.GA","authors_text":"Enrico Barausse, Irina Dvorkin, Marta Volonteri, Matteo Bonetti, Michael Tremmel","submitted_at":"2020-06-04T18:00:02Z","abstract_excerpt":"We revisit the predictions for the merger rate of massive black hole binaries detectable by the Laser Interferometer Space Antenna (LISA) and their background signal for pulsar-timing arrays. We focus on the effect of the delays between the merger of galaxies and the final coalescence of black hole binaries, and on supernova feedback on the black hole growth. By utilizing a semi-analytic galaxy formation model, not only do we account for the driving the evolution of binaries at separations $\\lesssim 1$ pc (gas-driven migration, stellar hardening and triple/quadruple massive black hole systems)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.03065","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.03065/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":"2026-07-05T01:59:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ya6yj6oMb+hlhGpB/fJuIFHg11zof2RGRTJswBtcaoPwJmelNEklrAz5GsaBarj8r3avX4xCX5zCJZMKGVpeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:36:10.892368Z"},"content_sha256":"034a7fb01f3d7eebfce732bb935171a19b9e2a69f9272cc2e81b7864eb5b794c","schema_version":"1.0","event_id":"sha256:034a7fb01f3d7eebfce732bb935171a19b9e2a69f9272cc2e81b7864eb5b794c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/bundle.json","state_url":"https://pith.science/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/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":"2026-08-06T16:36:10Z","links":{"resolver":"https://pith.science/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2","bundle":"https://pith.science/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/bundle.json","state":"https://pith.science/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:OG4JA6UKK6Z7OHQWZ4ZFCJ7WD2","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":"6e4c8af4be175c78e50ca47ff0b35add81b77cbbf8be0e4d6555cb96d2fb247e","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-06-04T18:00:02Z","title_canon_sha256":"32f9d076049f3a39706a8506732cbe6beebafc77ebfad2d27a7059c9db60b9c3"},"schema_version":"1.0","source":{"id":"2006.03065","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.03065","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"arxiv_version","alias_value":"2006.03065v2","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.03065","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_12","alias_value":"OG4JA6UKK6Z7","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_16","alias_value":"OG4JA6UKK6Z7OHQW","created_at":"2026-07-05T01:59:12Z"},{"alias_kind":"pith_short_8","alias_value":"OG4JA6UK","created_at":"2026-07-05T01:59:12Z"}],"graph_snapshots":[{"event_id":"sha256:034a7fb01f3d7eebfce732bb935171a19b9e2a69f9272cc2e81b7864eb5b794c","target":"graph","created_at":"2026-07-05T01:59:12Z","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/2006.03065/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We revisit the predictions for the merger rate of massive black hole binaries detectable by the Laser Interferometer Space Antenna (LISA) and their background signal for pulsar-timing arrays. We focus on the effect of the delays between the merger of galaxies and the final coalescence of black hole binaries, and on supernova feedback on the black hole growth. By utilizing a semi-analytic galaxy formation model, not only do we account for the driving the evolution of binaries at separations $\\lesssim 1$ pc (gas-driven migration, stellar hardening and triple/quadruple massive black hole systems)","authors_text":"Enrico Barausse, Irina Dvorkin, Marta Volonteri, Matteo Bonetti, Michael Tremmel","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-06-04T18:00:02Z","title":"Massive black hole merger rates: the effect of kpc separation wandering and supernova feedback"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.03065","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":"sha256:7695f7b60003ef329f272e04db6a4b9e829b868c3e55d01a95b6be0c964789b3","target":"record","created_at":"2026-07-05T01:59:12Z","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":"6e4c8af4be175c78e50ca47ff0b35add81b77cbbf8be0e4d6555cb96d2fb247e","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-06-04T18:00:02Z","title_canon_sha256":"32f9d076049f3a39706a8506732cbe6beebafc77ebfad2d27a7059c9db60b9c3"},"schema_version":"1.0","source":{"id":"2006.03065","kind":"arxiv","version":2}},"canonical_sha256":"71b8907a8a57b3f71e16cf325127f61eab3f2c6e6218457c764d08d479874e4c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71b8907a8a57b3f71e16cf325127f61eab3f2c6e6218457c764d08d479874e4c","first_computed_at":"2026-07-05T01:59:12.426266Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:59:12.426266Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FynQR8VdId+all3piSZcB3ZDFoyaJ1lwMsR6hITeAPQXabNXfeOUHSZDaIcgvtdUH29bIzr0PTWY+jciY7SICQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:59:12.426688Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.03065","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7695f7b60003ef329f272e04db6a4b9e829b868c3e55d01a95b6be0c964789b3","sha256:034a7fb01f3d7eebfce732bb935171a19b9e2a69f9272cc2e81b7864eb5b794c"],"state_sha256":"c3757ea5079c0b7551e768f3ba8dbc2748fbf843005dd05c2ded0699639ceb07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GGXBiFe4ALarFxEAgZIwHXEGTAJnzLl3hh+0vCdOQOHylVskh0D6+qHwoDXdjXBWNTwUOiff5iLvp2XNcBLuBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T16:36:10.895991Z","bundle_sha256":"3f13bbcff684ffacd836ef41973ecdc8b42e2ba4266747204e07e2e37303e4b3"}}