{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7TWSQTJV3TJCUZG3KEE7UELQFT","short_pith_number":"pith:7TWSQTJV","canonical_record":{"source":{"id":"1803.11478","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-30T14:04:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a5c62b645183c5b0c2e25778fe4f44a99a7149d672ddc74857cad97ed73fdc73","abstract_canon_sha256":"d57b305f7f40ba4608d90437025ed2ac94da3ce50948a8621f8bd3d2fcc4262b"},"schema_version":"1.0"},"canonical_sha256":"fced284d35dcd22a64db5109fa11702ce575d7fac1f8eadf4b833f473a529f0d","source":{"kind":"arxiv","id":"1803.11478","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.11478","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"arxiv_version","alias_value":"1803.11478v1","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.11478","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"pith_short_12","alias_value":"7TWSQTJV3TJC","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7TWSQTJV3TJCUZG3","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7TWSQTJV","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7TWSQTJV3TJCUZG3KEE7UELQFT","target":"record","payload":{"canonical_record":{"source":{"id":"1803.11478","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-30T14:04:24Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a5c62b645183c5b0c2e25778fe4f44a99a7149d672ddc74857cad97ed73fdc73","abstract_canon_sha256":"d57b305f7f40ba4608d90437025ed2ac94da3ce50948a8621f8bd3d2fcc4262b"},"schema_version":"1.0"},"canonical_sha256":"fced284d35dcd22a64db5109fa11702ce575d7fac1f8eadf4b833f473a529f0d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:37.992393Z","signature_b64":"RAbqZvUhjRirQ5NC/wrgdPhnnhCK3MLj8SfznA8/TwikGznqzVKWHr8zpYTH+ZAMNqXE2Og6SveEBUONelIFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fced284d35dcd22a64db5109fa11702ce575d7fac1f8eadf4b833f473a529f0d","last_reissued_at":"2026-05-18T00:17:37.991765Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:37.991765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.11478","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":"2026-05-18T00:17:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E4VoccqaBmpw5rFBYiF26MqmuF8Fmd53c1JXWZ+lkXvt3sNOuUBbYPO8xAQlk1ROzsJRtpxfEKyiyNgOWbP0Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:49:27.263341Z"},"content_sha256":"3c513d030e2859f5eaa9a92adf0aa81ffaec4c81d3e7f9382d41047552e14fcc","schema_version":"1.0","event_id":"sha256:3c513d030e2859f5eaa9a92adf0aa81ffaec4c81d3e7f9382d41047552e14fcc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7TWSQTJV3TJCUZG3KEE7UELQFT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impetus: Consistent SPH calculations of 3D spherical Bondi accretion onto a black hole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"F. Cruz, J. Klapp, J. M. Ramirez-Velasquez, L. Di G. Sigalotti, R. Gabbasov","submitted_at":"2018-03-30T14:04:24Z","abstract_excerpt":"We present three-dimensional calculations of spherically symmetric Bondi accretion onto a stationary supermassive black hole (SMBH) of mass $10^{8}$ $M_{\\odot}$ within a radial range of $0.02-10$ pc, using a modified version of the smoothed particle hydrodynamics (SPH) \\gad \\sp code, which ensures approximate first-order consistency (i.e., second-order accuracy) for the particle approximation. First-order consistency is restored by allowing the number of neighbours, $n_{\\rm neigh}$, and the smoothing length, $h$, to vary with the total number of particles, $N$, such that the asymptotic limits "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.11478","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":"2026-05-18T00:17:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HShyIXkVWX4eQDB0oHtVu3ZteU2y/u1wzrMPr2vyZrYT6VSJnrxTbMQS8eiUyq+qwkrFeP/8dm2R0CQWbn6OAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T06:49:27.263689Z"},"content_sha256":"c4f28514d70b16e664eb42f2b690bc75cee985847a61f038ffd81908d8941c94","schema_version":"1.0","event_id":"sha256:c4f28514d70b16e664eb42f2b690bc75cee985847a61f038ffd81908d8941c94"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/bundle.json","state_url":"https://pith.science/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/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":"2026-06-03T06:49:27Z","links":{"resolver":"https://pith.science/pith/7TWSQTJV3TJCUZG3KEE7UELQFT","bundle":"https://pith.science/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/bundle.json","state":"https://pith.science/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7TWSQTJV3TJCUZG3KEE7UELQFT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7TWSQTJV3TJCUZG3KEE7UELQFT","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":"d57b305f7f40ba4608d90437025ed2ac94da3ce50948a8621f8bd3d2fcc4262b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-30T14:04:24Z","title_canon_sha256":"a5c62b645183c5b0c2e25778fe4f44a99a7149d672ddc74857cad97ed73fdc73"},"schema_version":"1.0","source":{"id":"1803.11478","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.11478","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"arxiv_version","alias_value":"1803.11478v1","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.11478","created_at":"2026-05-18T00:17:37Z"},{"alias_kind":"pith_short_12","alias_value":"7TWSQTJV3TJC","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7TWSQTJV3TJCUZG3","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7TWSQTJV","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:c4f28514d70b16e664eb42f2b690bc75cee985847a61f038ffd81908d8941c94","target":"graph","created_at":"2026-05-18T00:17:37Z","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 present three-dimensional calculations of spherically symmetric Bondi accretion onto a stationary supermassive black hole (SMBH) of mass $10^{8}$ $M_{\\odot}$ within a radial range of $0.02-10$ pc, using a modified version of the smoothed particle hydrodynamics (SPH) \\gad \\sp code, which ensures approximate first-order consistency (i.e., second-order accuracy) for the particle approximation. First-order consistency is restored by allowing the number of neighbours, $n_{\\rm neigh}$, and the smoothing length, $h$, to vary with the total number of particles, $N$, such that the asymptotic limits ","authors_text":"F. Cruz, J. Klapp, J. M. Ramirez-Velasquez, L. Di G. Sigalotti, R. Gabbasov","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-30T14:04:24Z","title":"Impetus: Consistent SPH calculations of 3D spherical Bondi accretion onto a black hole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.11478","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":"sha256:3c513d030e2859f5eaa9a92adf0aa81ffaec4c81d3e7f9382d41047552e14fcc","target":"record","created_at":"2026-05-18T00:17:37Z","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":"d57b305f7f40ba4608d90437025ed2ac94da3ce50948a8621f8bd3d2fcc4262b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-03-30T14:04:24Z","title_canon_sha256":"a5c62b645183c5b0c2e25778fe4f44a99a7149d672ddc74857cad97ed73fdc73"},"schema_version":"1.0","source":{"id":"1803.11478","kind":"arxiv","version":1}},"canonical_sha256":"fced284d35dcd22a64db5109fa11702ce575d7fac1f8eadf4b833f473a529f0d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fced284d35dcd22a64db5109fa11702ce575d7fac1f8eadf4b833f473a529f0d","first_computed_at":"2026-05-18T00:17:37.991765Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:37.991765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RAbqZvUhjRirQ5NC/wrgdPhnnhCK3MLj8SfznA8/TwikGznqzVKWHr8zpYTH+ZAMNqXE2Og6SveEBUONelIFBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:37.992393Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.11478","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c513d030e2859f5eaa9a92adf0aa81ffaec4c81d3e7f9382d41047552e14fcc","sha256:c4f28514d70b16e664eb42f2b690bc75cee985847a61f038ffd81908d8941c94"],"state_sha256":"efbf012453a22b630485abf865ed62cc9be29930439bed218c1d886b33074144"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KvwzkRyY9+IRNMpltEm6Twu2O0WD4wPtF0bsjlSGmqAy0rhUrEIml4yU6jq1vCHth7DKud95QGRMxEbJMSMTBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T06:49:27.265761Z","bundle_sha256":"ab65dc7030a6fbba575ff4f42517a483247ce123f679bb493634bea54bd0f47a"}}