{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:M4PMI6KYCCRC6DHN4NSXI5RZVW","short_pith_number":"pith:M4PMI6KY","canonical_record":{"source":{"id":"1312.1391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-05T00:02:16Z","cross_cats_sorted":[],"title_canon_sha256":"aaf05bf1b8fb48613128e603f3a580c19243fc0ff99f634ec60fc1a9c330f889","abstract_canon_sha256":"ea0c8f4e6f94ddfa10b0d7d08621145a31ae41e5c71ade2e491c22d9e2dfa6df"},"schema_version":"1.0"},"canonical_sha256":"671ec4795810a22f0cede365747639ad888c287e4173428737935309ad86948e","source":{"kind":"arxiv","id":"1312.1391","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.1391","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"arxiv_version","alias_value":"1312.1391v1","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.1391","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"pith_short_12","alias_value":"M4PMI6KYCCRC","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"M4PMI6KYCCRC6DHN","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"M4PMI6KY","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:M4PMI6KYCCRC6DHN4NSXI5RZVW","target":"record","payload":{"canonical_record":{"source":{"id":"1312.1391","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-05T00:02:16Z","cross_cats_sorted":[],"title_canon_sha256":"aaf05bf1b8fb48613128e603f3a580c19243fc0ff99f634ec60fc1a9c330f889","abstract_canon_sha256":"ea0c8f4e6f94ddfa10b0d7d08621145a31ae41e5c71ade2e491c22d9e2dfa6df"},"schema_version":"1.0"},"canonical_sha256":"671ec4795810a22f0cede365747639ad888c287e4173428737935309ad86948e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:58.488233Z","signature_b64":"Lr6lmLdgbth6d65CL25WuzW5Fss5MFHvAOkGuAAFhG76kBM2UwOZjLcifFP1rx01uvu2SfNu8uV0XdTb93HACQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"671ec4795810a22f0cede365747639ad888c287e4173428737935309ad86948e","last_reissued_at":"2026-05-18T01:45:58.487369Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:58.487369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.1391","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":"2026-05-18T01:45:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iDqb+1NkhwHdaCRfRFQl0WqcWKJnejVIH/AVXgCbdXoIq79M8Wjq546pY/oyQRQrokJ+U4+M64jGP930drsbBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:55:51.937869Z"},"content_sha256":"7b49a01d2c89eb169de9ebf232b7788a730c11150860ed2ab9e46251776a4f1a","schema_version":"1.0","event_id":"sha256:7b49a01d2c89eb169de9ebf232b7788a730c11150860ed2ab9e46251776a4f1a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:M4PMI6KYCCRC6DHN4NSXI5RZVW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High redshift supermassive blackholes: accretion through cold flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Nishikanta Khandai, Rupert Croft, Tiziana Di Matteo, Yu Feng","submitted_at":"2013-12-05T00:02:16Z","abstract_excerpt":"We use zoom-in techniques to re-simulate three high-redshift (z > 5.5) halos which host 10^9 solar mass blackholes from the ~ Gpc volume, MassiveBlack cosmological hydrodynamic simulation. We examine a number of factors potentially affecting supermassive blackhole growth at high redshift in cosmological simulations. These include numerical resolution, feedback prescriptions and formulation of smoothed particle hydrodynamics. We find that varying the size of the region over which feedback energy is deposited directly, either for fixed number of neighbours or fixed volume makes very little diffe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.1391","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":"2026-05-18T01:45:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cTTXj0eWjTaaBXHRMN2L0zCY2lpzF6tKHS4+uBlZZRka8N9nLJUXNt2fqu/SaG5stbnpgJpzK7CIPUbNq6UYCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T16:55:51.938399Z"},"content_sha256":"6ea7723e949448fd40f0ec528416d3920b5d9b1167049e804688987e8e18dd10","schema_version":"1.0","event_id":"sha256:6ea7723e949448fd40f0ec528416d3920b5d9b1167049e804688987e8e18dd10"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/bundle.json","state_url":"https://pith.science/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/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":"2026-05-28T16:55:51Z","links":{"resolver":"https://pith.science/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW","bundle":"https://pith.science/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/bundle.json","state":"https://pith.science/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M4PMI6KYCCRC6DHN4NSXI5RZVW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:M4PMI6KYCCRC6DHN4NSXI5RZVW","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":"ea0c8f4e6f94ddfa10b0d7d08621145a31ae41e5c71ade2e491c22d9e2dfa6df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-05T00:02:16Z","title_canon_sha256":"aaf05bf1b8fb48613128e603f3a580c19243fc0ff99f634ec60fc1a9c330f889"},"schema_version":"1.0","source":{"id":"1312.1391","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.1391","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"arxiv_version","alias_value":"1312.1391v1","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.1391","created_at":"2026-05-18T01:45:58Z"},{"alias_kind":"pith_short_12","alias_value":"M4PMI6KYCCRC","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"M4PMI6KYCCRC6DHN","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"M4PMI6KY","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:6ea7723e949448fd40f0ec528416d3920b5d9b1167049e804688987e8e18dd10","target":"graph","created_at":"2026-05-18T01:45:58Z","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 use zoom-in techniques to re-simulate three high-redshift (z > 5.5) halos which host 10^9 solar mass blackholes from the ~ Gpc volume, MassiveBlack cosmological hydrodynamic simulation. We examine a number of factors potentially affecting supermassive blackhole growth at high redshift in cosmological simulations. These include numerical resolution, feedback prescriptions and formulation of smoothed particle hydrodynamics. We find that varying the size of the region over which feedback energy is deposited directly, either for fixed number of neighbours or fixed volume makes very little diffe","authors_text":"Nishikanta Khandai, Rupert Croft, Tiziana Di Matteo, Yu Feng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-05T00:02:16Z","title":"High redshift supermassive blackholes: accretion through cold flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.1391","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":"sha256:7b49a01d2c89eb169de9ebf232b7788a730c11150860ed2ab9e46251776a4f1a","target":"record","created_at":"2026-05-18T01:45:58Z","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":"ea0c8f4e6f94ddfa10b0d7d08621145a31ae41e5c71ade2e491c22d9e2dfa6df","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-05T00:02:16Z","title_canon_sha256":"aaf05bf1b8fb48613128e603f3a580c19243fc0ff99f634ec60fc1a9c330f889"},"schema_version":"1.0","source":{"id":"1312.1391","kind":"arxiv","version":1}},"canonical_sha256":"671ec4795810a22f0cede365747639ad888c287e4173428737935309ad86948e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"671ec4795810a22f0cede365747639ad888c287e4173428737935309ad86948e","first_computed_at":"2026-05-18T01:45:58.487369Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:58.487369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lr6lmLdgbth6d65CL25WuzW5Fss5MFHvAOkGuAAFhG76kBM2UwOZjLcifFP1rx01uvu2SfNu8uV0XdTb93HACQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:58.488233Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.1391","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b49a01d2c89eb169de9ebf232b7788a730c11150860ed2ab9e46251776a4f1a","sha256:6ea7723e949448fd40f0ec528416d3920b5d9b1167049e804688987e8e18dd10"],"state_sha256":"aec2e93546ccc0ed7c63e9b5790b1cfab38071984bb520975862af30119102dd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OKwuYcVIg5xjX/AdANz9P/ZmrwjZ3ZNGWSFURsZHvRmO2ODWizFKRtD+pWfJQn96zpiMEEONprkJ2ORdIr9FCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T16:55:51.941671Z","bundle_sha256":"65f20dbdc5e118ae9e6c86093a4e857def3410b3ffef3a398ba8c9ccb5fe4f1f"}}