{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:OVXGZYPHUWOKZE2PDPYO45PR4S","short_pith_number":"pith:OVXGZYPH","canonical_record":{"source":{"id":"astro-ph/0204486","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-29T12:51:29Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"7d9ef6621596dbb6f7d193b49ab9d7f7ad7d2c92b18726dba70b16929e84092a","abstract_canon_sha256":"264a7c844d0d3fe7e863345c9dcd904284a44602fb4a98eb5843d8f7ce1bb55c"},"schema_version":"1.0"},"canonical_sha256":"756e6ce1e7a59cac934f1bf0ee75f1e4a1e5a7426df01a45a2566cf7dff81c4c","source":{"kind":"arxiv","id":"astro-ph/0204486","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0204486","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0204486v1","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0204486","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_12","alias_value":"OVXGZYPHUWOK","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_16","alias_value":"OVXGZYPHUWOKZE2P","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_8","alias_value":"OVXGZYPH","created_at":"2026-07-04T16:29:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:OVXGZYPHUWOKZE2PDPYO45PR4S","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0204486","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-29T12:51:29Z","cross_cats_sorted":["gr-qc","hep-ph"],"title_canon_sha256":"7d9ef6621596dbb6f7d193b49ab9d7f7ad7d2c92b18726dba70b16929e84092a","abstract_canon_sha256":"264a7c844d0d3fe7e863345c9dcd904284a44602fb4a98eb5843d8f7ce1bb55c"},"schema_version":"1.0"},"canonical_sha256":"756e6ce1e7a59cac934f1bf0ee75f1e4a1e5a7426df01a45a2566cf7dff81c4c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:56.217968Z","signature_b64":"29zHzmrPQTeOdzoHY/AkfSwBfKQKDDInHh+dP9h2HkW6CkUBGOXWj7my4mAZeC9JK6r8I5Lc6Tqc3cKoUB0SCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"756e6ce1e7a59cac934f1bf0ee75f1e4a1e5a7426df01a45a2566cf7dff81c4c","last_reissued_at":"2026-07-04T16:29:56.217568Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:56.217568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0204486","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":"2026-07-04T16:29:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"01OWHgoZs/XW+S0EP2+av0X5UYQLstILCk6OnbVYuV99D7YBvYM3q3puPRHeQ7PNDMuc3UHayZIkxBWLB8O6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T06:41:31.046206Z"},"content_sha256":"3164f998c9759dae2bfef6fd94489ab459f8429aa841fac9b7e016a553f03b8e","schema_version":"1.0","event_id":"sha256:3164f998c9759dae2bfef6fd94489ab459f8429aa841fac9b7e016a553f03b8e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:OVXGZYPHUWOKZE2PDPYO45PR4S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Could supermassive black holes be quintessential primordial black holes?","license":"","headline":"","cross_cats":["gr-qc","hep-ph"],"primary_cat":"astro-ph","authors_text":"Joao Magueijo, Rachel Bean","submitted_at":"2002-04-29T12:51:29Z","abstract_excerpt":"There is growing observational evidence for a population of supermassive black holes (SMBHs) in galactic bulges. We examine in detail the conditions under which these black holes must have originated from primordial black holes (PBHs). We consider the merging and accretion history experienced by SMBHs to find that, whereas it is possible that they were formed by purely astrophysical processes, this is unlikely and most probably a populations of primordial progenitors is necessary. We identify the mass distribution and comoving density of this population and then propose a cosmological scenario"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0204486","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/astro-ph/0204486/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":"2026-07-04T16:29:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1TGsLoKeO/30kZzKcHDQvxN8axboth7TOE2bVNwKCmgmq/V7yxoonJNOAUrY1BrffEprcHG1MI1FEkxaZcJ4Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T06:41:31.046875Z"},"content_sha256":"818f0b2e7c7daa3326ae90506488f8d654fc750a06fcff2daa108dd16900bd8c","schema_version":"1.0","event_id":"sha256:818f0b2e7c7daa3326ae90506488f8d654fc750a06fcff2daa108dd16900bd8c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/bundle.json","state_url":"https://pith.science/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/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":"2026-08-14T06:41:31Z","links":{"resolver":"https://pith.science/pith/OVXGZYPHUWOKZE2PDPYO45PR4S","bundle":"https://pith.science/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/bundle.json","state":"https://pith.science/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OVXGZYPHUWOKZE2PDPYO45PR4S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:OVXGZYPHUWOKZE2PDPYO45PR4S","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":"264a7c844d0d3fe7e863345c9dcd904284a44602fb4a98eb5843d8f7ce1bb55c","cross_cats_sorted":["gr-qc","hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-29T12:51:29Z","title_canon_sha256":"7d9ef6621596dbb6f7d193b49ab9d7f7ad7d2c92b18726dba70b16929e84092a"},"schema_version":"1.0","source":{"id":"astro-ph/0204486","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0204486","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0204486v1","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0204486","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_12","alias_value":"OVXGZYPHUWOK","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_16","alias_value":"OVXGZYPHUWOKZE2P","created_at":"2026-07-04T16:29:56Z"},{"alias_kind":"pith_short_8","alias_value":"OVXGZYPH","created_at":"2026-07-04T16:29:56Z"}],"graph_snapshots":[{"event_id":"sha256:818f0b2e7c7daa3326ae90506488f8d654fc750a06fcff2daa108dd16900bd8c","target":"graph","created_at":"2026-07-04T16:29:56Z","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/astro-ph/0204486/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"There is growing observational evidence for a population of supermassive black holes (SMBHs) in galactic bulges. We examine in detail the conditions under which these black holes must have originated from primordial black holes (PBHs). We consider the merging and accretion history experienced by SMBHs to find that, whereas it is possible that they were formed by purely astrophysical processes, this is unlikely and most probably a populations of primordial progenitors is necessary. We identify the mass distribution and comoving density of this population and then propose a cosmological scenario","authors_text":"Joao Magueijo, Rachel Bean","cross_cats":["gr-qc","hep-ph"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-04-29T12:51:29Z","title":"Could supermassive black holes be quintessential primordial black holes?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0204486","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":"sha256:3164f998c9759dae2bfef6fd94489ab459f8429aa841fac9b7e016a553f03b8e","target":"record","created_at":"2026-07-04T16:29:56Z","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":"264a7c844d0d3fe7e863345c9dcd904284a44602fb4a98eb5843d8f7ce1bb55c","cross_cats_sorted":["gr-qc","hep-ph"],"license":"","primary_cat":"astro-ph","submitted_at":"2002-04-29T12:51:29Z","title_canon_sha256":"7d9ef6621596dbb6f7d193b49ab9d7f7ad7d2c92b18726dba70b16929e84092a"},"schema_version":"1.0","source":{"id":"astro-ph/0204486","kind":"arxiv","version":1}},"canonical_sha256":"756e6ce1e7a59cac934f1bf0ee75f1e4a1e5a7426df01a45a2566cf7dff81c4c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"756e6ce1e7a59cac934f1bf0ee75f1e4a1e5a7426df01a45a2566cf7dff81c4c","first_computed_at":"2026-07-04T16:29:56.217568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:29:56.217568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"29zHzmrPQTeOdzoHY/AkfSwBfKQKDDInHh+dP9h2HkW6CkUBGOXWj7my4mAZeC9JK6r8I5Lc6Tqc3cKoUB0SCA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:29:56.217968Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0204486","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3164f998c9759dae2bfef6fd94489ab459f8429aa841fac9b7e016a553f03b8e","sha256:818f0b2e7c7daa3326ae90506488f8d654fc750a06fcff2daa108dd16900bd8c"],"state_sha256":"4a54f2681b60174fff9d45c9114b0df05ca8f536986a2774d307d8fa1070f994"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vp6R/8tqi/pbXlt0W1QS5B6X0+VVm5axEoQtVTQHvakbrdKgi7b/qu3tIgh7WRUbPqRi3H1k/zla6D6ngQdPBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T06:41:31.051730Z","bundle_sha256":"1e75da926807f05648f7a217ad53680abff330ab38e4cb3ec695cc27587f7ec6"}}