{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:NFNLAJAM4T54XNKWGNJ4FVQ4GN","short_pith_number":"pith:NFNLAJAM","canonical_record":{"source":{"id":"1111.3800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T13:39:17Z","cross_cats_sorted":[],"title_canon_sha256":"3790f40ececdf8e25a5917668a1a3a50f4e387ed5f531fbeda586ea994355e61","abstract_canon_sha256":"a4eea15c03154613f5ecad28415a465e0ade753b234e20687946a33165b2784c"},"schema_version":"1.0"},"canonical_sha256":"695ab0240ce4fbcbb5563353c2d61c3362f386beb94c6722cca424998868bfde","source":{"kind":"arxiv","id":"1111.3800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.3800","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"arxiv_version","alias_value":"1111.3800v1","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.3800","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"pith_short_12","alias_value":"NFNLAJAM4T54","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NFNLAJAM4T54XNKW","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NFNLAJAM","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:NFNLAJAM4T54XNKWGNJ4FVQ4GN","target":"record","payload":{"canonical_record":{"source":{"id":"1111.3800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T13:39:17Z","cross_cats_sorted":[],"title_canon_sha256":"3790f40ececdf8e25a5917668a1a3a50f4e387ed5f531fbeda586ea994355e61","abstract_canon_sha256":"a4eea15c03154613f5ecad28415a465e0ade753b234e20687946a33165b2784c"},"schema_version":"1.0"},"canonical_sha256":"695ab0240ce4fbcbb5563353c2d61c3362f386beb94c6722cca424998868bfde","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:32.393544Z","signature_b64":"EHCC22W0ye4yuoBJ1w44NZdP6QZl51ZCAsMKnfTl8vk+60qszH44lpf3s/IQb+Q/wTPmNdVEpB0fSXqUGCU5AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"695ab0240ce4fbcbb5563353c2d61c3362f386beb94c6722cca424998868bfde","last_reissued_at":"2026-05-18T01:59:32.392912Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:32.392912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.3800","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":"2026-05-18T01:59:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P/GKm1o8j/wY6QFUERdf6AvK4g0qsREirhOKm+DhCiFUfLEir2Ya2WCyyXikGRjIRmxLrl0be4elog2SSAJNCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:23:11.285347Z"},"content_sha256":"1e91de91f7ea66f17ddb6f62810fe47afa1e2d2e4ca7e4b6c260512d8654a345","schema_version":"1.0","event_id":"sha256:1e91de91f7ea66f17ddb6f62810fe47afa1e2d2e4ca7e4b6c260512d8654a345"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:NFNLAJAM4T54XNKWGNJ4FVQ4GN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining Dynamical Dark Energy Models through the Abundance of High-Redshift Supermassive Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alessandra Lamastra, Cinzia Di Porto, Fabrizio Fiore, Luca Amendola, Nicola Menci","submitted_at":"2011-11-16T13:39:17Z","abstract_excerpt":"We compute the number density of massive Black Holes (BHs) at the centre of galaxies at z=6 in different Dynamical Dark Energy (DDE) cosmologies, and compare it with existing observational lower limits, to derive constraints on the evolution of the Dark Energy equation of state parameter w. Our approach only assumes the canonical scenario for structure formation from the collapse of overdense regions of the Dark Matter dominated primordial density field on progressively larger scales; the Black Hole accretion and merging rate have been maximized in the computation so as to obtain robust constr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.3800","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":""},"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":"2026-05-18T01:59:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L1Ry4tZerPoMzKNSKb3v38v2VMxzfRR8Etat0vygLDutQOayUkwz5wlzccE32SilesyNg2xg7aApBGskfB06CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:23:11.285732Z"},"content_sha256":"634f83de3e3ef2bf5c513ad6e9661a0031a34fcea913b453f6611a4bb6d99af2","schema_version":"1.0","event_id":"sha256:634f83de3e3ef2bf5c513ad6e9661a0031a34fcea913b453f6611a4bb6d99af2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/bundle.json","state_url":"https://pith.science/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/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":"2026-06-04T18:23:11Z","links":{"resolver":"https://pith.science/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN","bundle":"https://pith.science/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/bundle.json","state":"https://pith.science/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NFNLAJAM4T54XNKWGNJ4FVQ4GN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:NFNLAJAM4T54XNKWGNJ4FVQ4GN","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":"a4eea15c03154613f5ecad28415a465e0ade753b234e20687946a33165b2784c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T13:39:17Z","title_canon_sha256":"3790f40ececdf8e25a5917668a1a3a50f4e387ed5f531fbeda586ea994355e61"},"schema_version":"1.0","source":{"id":"1111.3800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.3800","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"arxiv_version","alias_value":"1111.3800v1","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.3800","created_at":"2026-05-18T01:59:32Z"},{"alias_kind":"pith_short_12","alias_value":"NFNLAJAM4T54","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"NFNLAJAM4T54XNKW","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"NFNLAJAM","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:634f83de3e3ef2bf5c513ad6e9661a0031a34fcea913b453f6611a4bb6d99af2","target":"graph","created_at":"2026-05-18T01:59:32Z","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 compute the number density of massive Black Holes (BHs) at the centre of galaxies at z=6 in different Dynamical Dark Energy (DDE) cosmologies, and compare it with existing observational lower limits, to derive constraints on the evolution of the Dark Energy equation of state parameter w. Our approach only assumes the canonical scenario for structure formation from the collapse of overdense regions of the Dark Matter dominated primordial density field on progressively larger scales; the Black Hole accretion and merging rate have been maximized in the computation so as to obtain robust constr","authors_text":"Alessandra Lamastra, Cinzia Di Porto, Fabrizio Fiore, Luca Amendola, Nicola Menci","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T13:39:17Z","title":"Constraining Dynamical Dark Energy Models through the Abundance of High-Redshift Supermassive Black Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.3800","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":"sha256:1e91de91f7ea66f17ddb6f62810fe47afa1e2d2e4ca7e4b6c260512d8654a345","target":"record","created_at":"2026-05-18T01:59:32Z","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":"a4eea15c03154613f5ecad28415a465e0ade753b234e20687946a33165b2784c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T13:39:17Z","title_canon_sha256":"3790f40ececdf8e25a5917668a1a3a50f4e387ed5f531fbeda586ea994355e61"},"schema_version":"1.0","source":{"id":"1111.3800","kind":"arxiv","version":1}},"canonical_sha256":"695ab0240ce4fbcbb5563353c2d61c3362f386beb94c6722cca424998868bfde","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"695ab0240ce4fbcbb5563353c2d61c3362f386beb94c6722cca424998868bfde","first_computed_at":"2026-05-18T01:59:32.392912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:32.392912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EHCC22W0ye4yuoBJ1w44NZdP6QZl51ZCAsMKnfTl8vk+60qszH44lpf3s/IQb+Q/wTPmNdVEpB0fSXqUGCU5AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:32.393544Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.3800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e91de91f7ea66f17ddb6f62810fe47afa1e2d2e4ca7e4b6c260512d8654a345","sha256:634f83de3e3ef2bf5c513ad6e9661a0031a34fcea913b453f6611a4bb6d99af2"],"state_sha256":"0c6a84a71f824e7ef41eeaa0bd296a50d7de82f3556370e06daa09828dddd907"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aM3XXIJItnrQmhGcg76wrk+nx+PBOKabKXLTnPgSl2Q6bsP1QoEhTeE2EIGe5xnXqH4cw+LZ7eXHHc4qQSGJCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T18:23:11.288434Z","bundle_sha256":"771716a95b4d87805a8824278e93001df3b0fb2c2dcad1031d49726753fc66c4"}}