{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:4OSAAUS22FPM52QOBNWZBWYY6E","short_pith_number":"pith:4OSAAUS2","canonical_record":{"source":{"id":"0808.2883","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-21T08:19:51Z","cross_cats_sorted":[],"title_canon_sha256":"69e26c33ed683802ec7838143dbdb133ace5b938a5f869cf73a117ab584c6672","abstract_canon_sha256":"2e2129214cc88c85429dc0320bc2fd1ff6c6188a65c4a90c758a51410f3bc2e5"},"schema_version":"1.0"},"canonical_sha256":"e3a400525ad15eceea0e0b6d90db18f1287c4f110a8618d472324d8d9905605e","source":{"kind":"arxiv","id":"0808.2883","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2883","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2883v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2883","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"4OSAAUS22FPM","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"4OSAAUS22FPM52QO","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"4OSAAUS2","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:4OSAAUS22FPM52QOBNWZBWYY6E","target":"record","payload":{"canonical_record":{"source":{"id":"0808.2883","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-21T08:19:51Z","cross_cats_sorted":[],"title_canon_sha256":"69e26c33ed683802ec7838143dbdb133ace5b938a5f869cf73a117ab584c6672","abstract_canon_sha256":"2e2129214cc88c85429dc0320bc2fd1ff6c6188a65c4a90c758a51410f3bc2e5"},"schema_version":"1.0"},"canonical_sha256":"e3a400525ad15eceea0e0b6d90db18f1287c4f110a8618d472324d8d9905605e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:35:15.155855Z","signature_b64":"F7lsfhYhs0s5eBZFaYn6lee5FqjCb09vGZON3kF8nDHH69IMGsdtuaO5WkEQjhs7TLlfte40aGRpJA9mFWOrDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3a400525ad15eceea0e0b6d90db18f1287c4f110a8618d472324d8d9905605e","last_reissued_at":"2026-05-18T02:35:15.155086Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:35:15.155086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.2883","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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B0O78y6OpTRFSNCFXRbeiQ6zA8MALFw3UUNCDOIxIfLy9NPewAUq3EbLf8T964DTxASeKH79sTuidMhyDkH5DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:26:47.748476Z"},"content_sha256":"99d1af6474c7add31e57ecc00b91b3c364f5a63db9a8b9b65ffbea5e3036f56c","schema_version":"1.0","event_id":"sha256:99d1af6474c7add31e57ecc00b91b3c364f5a63db9a8b9b65ffbea5e3036f56c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:4OSAAUS22FPM52QOBNWZBWYY6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low angular momentum flow model of Sgr A* activity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. Czerny, M. Moscibrodzka","submitted_at":"2008-08-21T08:19:51Z","abstract_excerpt":"Sgr A* is the closest massive black hole and can be observed with the highest angular resolution. Nevertheless, our current understanding of the accretion process in this source is very poor. The inflow is almost certainly of low radiative efficiency and it is accompanied by a strong outflow and the flow is strongly variable but the details of the dynamics are unknown. Even the amount of angular momentum in the flow is an open question. Here we argue that low angular momentum scenario is better suited to explain the flow variability. We present a new hybrid model which describes such a flow an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2883","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":"2026-05-18T02:35:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"apQKT9H23Fnf6ASrssUO6zI8I3CXBXlRugtbAq/ruxRDL4LDa7kNuJD5Fz7kb/AshsQ04KbJcEqBsEcFeeNaDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T02:26:47.748826Z"},"content_sha256":"fdc0e765490603f15deb1d1a4f1a2645090db99f5e4e49237b984c3b223d0fd4","schema_version":"1.0","event_id":"sha256:fdc0e765490603f15deb1d1a4f1a2645090db99f5e4e49237b984c3b223d0fd4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4OSAAUS22FPM52QOBNWZBWYY6E/bundle.json","state_url":"https://pith.science/pith/4OSAAUS22FPM52QOBNWZBWYY6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4OSAAUS22FPM52QOBNWZBWYY6E/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":"2026-06-02T02:26:47Z","links":{"resolver":"https://pith.science/pith/4OSAAUS22FPM52QOBNWZBWYY6E","bundle":"https://pith.science/pith/4OSAAUS22FPM52QOBNWZBWYY6E/bundle.json","state":"https://pith.science/pith/4OSAAUS22FPM52QOBNWZBWYY6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4OSAAUS22FPM52QOBNWZBWYY6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:4OSAAUS22FPM52QOBNWZBWYY6E","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":"2e2129214cc88c85429dc0320bc2fd1ff6c6188a65c4a90c758a51410f3bc2e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-21T08:19:51Z","title_canon_sha256":"69e26c33ed683802ec7838143dbdb133ace5b938a5f869cf73a117ab584c6672"},"schema_version":"1.0","source":{"id":"0808.2883","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2883","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2883v1","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2883","created_at":"2026-05-18T02:35:15Z"},{"alias_kind":"pith_short_12","alias_value":"4OSAAUS22FPM","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"4OSAAUS22FPM52QO","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"4OSAAUS2","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:fdc0e765490603f15deb1d1a4f1a2645090db99f5e4e49237b984c3b223d0fd4","target":"graph","created_at":"2026-05-18T02:35:15Z","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":"Sgr A* is the closest massive black hole and can be observed with the highest angular resolution. Nevertheless, our current understanding of the accretion process in this source is very poor. The inflow is almost certainly of low radiative efficiency and it is accompanied by a strong outflow and the flow is strongly variable but the details of the dynamics are unknown. Even the amount of angular momentum in the flow is an open question. Here we argue that low angular momentum scenario is better suited to explain the flow variability. We present a new hybrid model which describes such a flow an","authors_text":"B. Czerny, M. Moscibrodzka","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-21T08:19:51Z","title":"Low angular momentum flow model of Sgr A* activity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2883","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":"sha256:99d1af6474c7add31e57ecc00b91b3c364f5a63db9a8b9b65ffbea5e3036f56c","target":"record","created_at":"2026-05-18T02:35:15Z","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":"2e2129214cc88c85429dc0320bc2fd1ff6c6188a65c4a90c758a51410f3bc2e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-08-21T08:19:51Z","title_canon_sha256":"69e26c33ed683802ec7838143dbdb133ace5b938a5f869cf73a117ab584c6672"},"schema_version":"1.0","source":{"id":"0808.2883","kind":"arxiv","version":1}},"canonical_sha256":"e3a400525ad15eceea0e0b6d90db18f1287c4f110a8618d472324d8d9905605e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3a400525ad15eceea0e0b6d90db18f1287c4f110a8618d472324d8d9905605e","first_computed_at":"2026-05-18T02:35:15.155086Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:35:15.155086Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F7lsfhYhs0s5eBZFaYn6lee5FqjCb09vGZON3kF8nDHH69IMGsdtuaO5WkEQjhs7TLlfte40aGRpJA9mFWOrDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:35:15.155855Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.2883","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99d1af6474c7add31e57ecc00b91b3c364f5a63db9a8b9b65ffbea5e3036f56c","sha256:fdc0e765490603f15deb1d1a4f1a2645090db99f5e4e49237b984c3b223d0fd4"],"state_sha256":"9a27aa6a755fe2edb287b54acf702ca9851df159740d355c013bfdccb72c95bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vfr+BKXbpez9vp0Z8aiu0Ool7azlMW7OqyS7FFF2KhvKd8azMMHH5eSBH7ilJI4D7f6Do1OHkEPcgCwKdNw1Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T02:26:47.750777Z","bundle_sha256":"9ee84181acc10fc8ad1e2d4e634ac9eb5af22ba5960cad6a2fbeca62c0d18d7b"}}