{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:P4D2U7RUU5AYZMZT4OX6TBBSHT","short_pith_number":"pith:P4D2U7RU","canonical_record":{"source":{"id":"1211.6840","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-29T08:26:35Z","cross_cats_sorted":[],"title_canon_sha256":"83f1a2e6205d23381d93a20d57f17a7bf5ec3ae235baa2336ed507bd1909c73f","abstract_canon_sha256":"08650f01f219017019df96f7a5f7ad350a4dd96ae263e07e17e2d1275c4055f2"},"schema_version":"1.0"},"canonical_sha256":"7f07aa7e34a7418cb333e3afe984323cfa1b736b4fac7b82bdac1315c7630f83","source":{"kind":"arxiv","id":"1211.6840","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6840","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6840v3","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6840","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"pith_short_12","alias_value":"P4D2U7RUU5AY","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"P4D2U7RUU5AYZMZT","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"P4D2U7RU","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:P4D2U7RUU5AYZMZT4OX6TBBSHT","target":"record","payload":{"canonical_record":{"source":{"id":"1211.6840","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-29T08:26:35Z","cross_cats_sorted":[],"title_canon_sha256":"83f1a2e6205d23381d93a20d57f17a7bf5ec3ae235baa2336ed507bd1909c73f","abstract_canon_sha256":"08650f01f219017019df96f7a5f7ad350a4dd96ae263e07e17e2d1275c4055f2"},"schema_version":"1.0"},"canonical_sha256":"7f07aa7e34a7418cb333e3afe984323cfa1b736b4fac7b82bdac1315c7630f83","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:53.443793Z","signature_b64":"gtzj4DtMrv5icQ04nqzzoEX3bYbFTRCpVcdDuqJ+5/TpQhaeVrEiGRaf9RedlTWrpDkfhhL4L/xJ+wkHdCCiCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7f07aa7e34a7418cb333e3afe984323cfa1b736b4fac7b82bdac1315c7630f83","last_reissued_at":"2026-05-18T01:52:53.443363Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:53.443363Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.6840","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:52:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4Ps0cAsVh1MGCnw8SlJU5tuZYHT9L4wokpFt+IcApF208uAZBOMYME8yHYycJA8mK0upMvPF3ZqVpxg7yJu9DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:32:45.983915Z"},"content_sha256":"290944bb20a4c49e817d764b82dbd23feca9677bb3ddc3e6d5993fe9e2c75a0e","schema_version":"1.0","event_id":"sha256:290944bb20a4c49e817d764b82dbd23feca9677bb3ddc3e6d5993fe9e2c75a0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:P4D2U7RUU5AYZMZT4OX6TBBSHT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massive black holes in central cluster galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Luca Ciotti, Marta Volonteri","submitted_at":"2012-11-29T08:26:35Z","abstract_excerpt":"We explore how the co-evolution of massive black holes (MBHs) and galaxies is affected by environmental effects, addressing in particular MBHs hosted in the central galaxies of clusters (we will refer to these galaxies in general as 'CGs'). Recently the sample of MBHs in CGs with dynamically measured masses has increased, and it has been suggested that these MBH masses (M_BH) deviate from the expected correlations with velocity dispersion (sigma) and mass of the bulge (M_bulge) of the host galaxy: MBHs in CGs appear to be `over-massive'. This discrepancy is more pronounced when considering the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6840","kind":"arxiv","version":3},"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":"2026-05-18T01:52:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5V2JJ/vTC77KrChPqf64MfQiKFiFoDS29E26crUUsyKuEat5uUH+RdX2Eg27c27q+83EzDmCMQwijWcwf02ZCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:32:45.984269Z"},"content_sha256":"2c3125bcc2778aa1cea50903fae3a2de9111e447cc2059ae3181860b521fe09b","schema_version":"1.0","event_id":"sha256:2c3125bcc2778aa1cea50903fae3a2de9111e447cc2059ae3181860b521fe09b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/bundle.json","state_url":"https://pith.science/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/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":"2026-06-03T01:32:45Z","links":{"resolver":"https://pith.science/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT","bundle":"https://pith.science/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/bundle.json","state":"https://pith.science/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P4D2U7RUU5AYZMZT4OX6TBBSHT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:P4D2U7RUU5AYZMZT4OX6TBBSHT","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":"08650f01f219017019df96f7a5f7ad350a4dd96ae263e07e17e2d1275c4055f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-29T08:26:35Z","title_canon_sha256":"83f1a2e6205d23381d93a20d57f17a7bf5ec3ae235baa2336ed507bd1909c73f"},"schema_version":"1.0","source":{"id":"1211.6840","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.6840","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"arxiv_version","alias_value":"1211.6840v3","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.6840","created_at":"2026-05-18T01:52:53Z"},{"alias_kind":"pith_short_12","alias_value":"P4D2U7RUU5AY","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"P4D2U7RUU5AYZMZT","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"P4D2U7RU","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:2c3125bcc2778aa1cea50903fae3a2de9111e447cc2059ae3181860b521fe09b","target":"graph","created_at":"2026-05-18T01:52:53Z","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":"We explore how the co-evolution of massive black holes (MBHs) and galaxies is affected by environmental effects, addressing in particular MBHs hosted in the central galaxies of clusters (we will refer to these galaxies in general as 'CGs'). Recently the sample of MBHs in CGs with dynamically measured masses has increased, and it has been suggested that these MBH masses (M_BH) deviate from the expected correlations with velocity dispersion (sigma) and mass of the bulge (M_bulge) of the host galaxy: MBHs in CGs appear to be `over-massive'. This discrepancy is more pronounced when considering the","authors_text":"Luca Ciotti, Marta Volonteri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-29T08:26:35Z","title":"Massive black holes in central cluster galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.6840","kind":"arxiv","version":3},"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":"sha256:290944bb20a4c49e817d764b82dbd23feca9677bb3ddc3e6d5993fe9e2c75a0e","target":"record","created_at":"2026-05-18T01:52:53Z","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":"08650f01f219017019df96f7a5f7ad350a4dd96ae263e07e17e2d1275c4055f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-29T08:26:35Z","title_canon_sha256":"83f1a2e6205d23381d93a20d57f17a7bf5ec3ae235baa2336ed507bd1909c73f"},"schema_version":"1.0","source":{"id":"1211.6840","kind":"arxiv","version":3}},"canonical_sha256":"7f07aa7e34a7418cb333e3afe984323cfa1b736b4fac7b82bdac1315c7630f83","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7f07aa7e34a7418cb333e3afe984323cfa1b736b4fac7b82bdac1315c7630f83","first_computed_at":"2026-05-18T01:52:53.443363Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:53.443363Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gtzj4DtMrv5icQ04nqzzoEX3bYbFTRCpVcdDuqJ+5/TpQhaeVrEiGRaf9RedlTWrpDkfhhL4L/xJ+wkHdCCiCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:53.443793Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.6840","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:290944bb20a4c49e817d764b82dbd23feca9677bb3ddc3e6d5993fe9e2c75a0e","sha256:2c3125bcc2778aa1cea50903fae3a2de9111e447cc2059ae3181860b521fe09b"],"state_sha256":"6740df2484b819cc19c0bc3a3ea52a8d096407a3edde9bd722fadbb92eb9aee9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TY/cjfGxAuB8RpAUwg+SpNHPtpjC19oN72o292P4ie+7qeE4J22/pvqK6CkE5Ju4WeNAk/eka/HFgzLJzODkAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T01:32:45.986379Z","bundle_sha256":"aa44d21bd7ff6003b14cc49fd493c4f75e36bdf62b2243f70ae0cbd11af41e66"}}