{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:CJGOABOH64SHEBBDWXLJ4DYMRH","short_pith_number":"pith:CJGOABOH","canonical_record":{"source":{"id":"0810.5130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-28T20:13:22Z","cross_cats_sorted":[],"title_canon_sha256":"d2b6ad9bbd96f9224e6cff1e0ef20d406bf8598dc8549f66e381ca510b825e14","abstract_canon_sha256":"31ac9ed7c93a7caeaaf170ea8f6451d64556c30b1b60cfc8d7d4c24762a711f0"},"schema_version":"1.0"},"canonical_sha256":"124ce005c7f724720423b5d69e0f0c89ceb9f561756e21e85b74e44c8ba68120","source":{"kind":"arxiv","id":"0810.5130","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.5130","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"arxiv_version","alias_value":"0810.5130v1","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.5130","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"pith_short_12","alias_value":"CJGOABOH64SH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"CJGOABOH64SHEBBD","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"CJGOABOH","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:CJGOABOH64SHEBBDWXLJ4DYMRH","target":"record","payload":{"canonical_record":{"source":{"id":"0810.5130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-28T20:13:22Z","cross_cats_sorted":[],"title_canon_sha256":"d2b6ad9bbd96f9224e6cff1e0ef20d406bf8598dc8549f66e381ca510b825e14","abstract_canon_sha256":"31ac9ed7c93a7caeaaf170ea8f6451d64556c30b1b60cfc8d7d4c24762a711f0"},"schema_version":"1.0"},"canonical_sha256":"124ce005c7f724720423b5d69e0f0c89ceb9f561756e21e85b74e44c8ba68120","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:25.627387Z","signature_b64":"SW5lH6JmdTZRxYvixdvUO1SP4asFA8uwb5T56lRt88HR0cjerihvjrXxvr9bFeqA0Y9qnv6ywlMT+w8niMCqAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"124ce005c7f724720423b5d69e0f0c89ceb9f561756e21e85b74e44c8ba68120","last_reissued_at":"2026-05-18T04:29:25.627007Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:25.627007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0810.5130","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":"2026-05-18T04:29:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tFEcsn8DWvUEUbgUscM6NNTplvGgoikmhGaoZt7I96OsP1vgnKf3YCiI9lZdrHTFVcTCFEXbfMkpnYeEJdUxDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:35:46.367986Z"},"content_sha256":"8184b48b09c5df47605e554d83fac28c04cb347c985f008b9c5b05e45bcbedd2","schema_version":"1.0","event_id":"sha256:8184b48b09c5df47605e554d83fac28c04cb347c985f008b9c5b05e45bcbedd2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:CJGOABOH64SHEBBDWXLJ4DYMRH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-Velocity Clouds in the Nearby Spiral Galaxy M 83","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Bart P. Wakker, Eric D. Miller, Joel N. Bregman","submitted_at":"2008-10-28T20:13:22Z","abstract_excerpt":"We present deep HI 21-cm and optical observations of the face-on spiral galaxy M 83 obtained as part of a project to search for high-velocity clouds (HVCs) in nearby galaxies. Anomalous-velocity neutral gas is detected toward M 83, with 5.6x10^7 Msolar of HI contained in a disk rotating 40-50 km/s more slowly in projection than the bulk of the gas. We interpret this as a vertically extended thick disk of neutral material, containing 5.5% of the total HI within the central 8 kpc. Using an automated source detection algorithm to search for small-scale HI emission features, we find eight distinct"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.5130","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":"2026-05-18T04:29:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ej8hRSQkZjgeBK/d7AUncq1NDHkkAnL4HBsZPDAIffSLo7L602MnQkA77h+FfM1tXrGgn7oLLH9k4EIvQtFiDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:35:46.368685Z"},"content_sha256":"356447b386e1ee16915451a09f88325b5c07d8969e5ff71335644ff767e4bb0a","schema_version":"1.0","event_id":"sha256:356447b386e1ee16915451a09f88325b5c07d8969e5ff71335644ff767e4bb0a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/bundle.json","state_url":"https://pith.science/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/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":"2026-06-10T01:35:46Z","links":{"resolver":"https://pith.science/pith/CJGOABOH64SHEBBDWXLJ4DYMRH","bundle":"https://pith.science/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/bundle.json","state":"https://pith.science/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CJGOABOH64SHEBBDWXLJ4DYMRH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:CJGOABOH64SHEBBDWXLJ4DYMRH","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":"31ac9ed7c93a7caeaaf170ea8f6451d64556c30b1b60cfc8d7d4c24762a711f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-28T20:13:22Z","title_canon_sha256":"d2b6ad9bbd96f9224e6cff1e0ef20d406bf8598dc8549f66e381ca510b825e14"},"schema_version":"1.0","source":{"id":"0810.5130","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0810.5130","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"arxiv_version","alias_value":"0810.5130v1","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0810.5130","created_at":"2026-05-18T04:29:25Z"},{"alias_kind":"pith_short_12","alias_value":"CJGOABOH64SH","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"CJGOABOH64SHEBBD","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"CJGOABOH","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:356447b386e1ee16915451a09f88325b5c07d8969e5ff71335644ff767e4bb0a","target":"graph","created_at":"2026-05-18T04:29:25Z","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 deep HI 21-cm and optical observations of the face-on spiral galaxy M 83 obtained as part of a project to search for high-velocity clouds (HVCs) in nearby galaxies. Anomalous-velocity neutral gas is detected toward M 83, with 5.6x10^7 Msolar of HI contained in a disk rotating 40-50 km/s more slowly in projection than the bulk of the gas. We interpret this as a vertically extended thick disk of neutral material, containing 5.5% of the total HI within the central 8 kpc. Using an automated source detection algorithm to search for small-scale HI emission features, we find eight distinct","authors_text":"Bart P. Wakker, Eric D. Miller, Joel N. Bregman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-28T20:13:22Z","title":"High-Velocity Clouds in the Nearby Spiral Galaxy M 83"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.5130","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":"sha256:8184b48b09c5df47605e554d83fac28c04cb347c985f008b9c5b05e45bcbedd2","target":"record","created_at":"2026-05-18T04:29:25Z","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":"31ac9ed7c93a7caeaaf170ea8f6451d64556c30b1b60cfc8d7d4c24762a711f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-10-28T20:13:22Z","title_canon_sha256":"d2b6ad9bbd96f9224e6cff1e0ef20d406bf8598dc8549f66e381ca510b825e14"},"schema_version":"1.0","source":{"id":"0810.5130","kind":"arxiv","version":1}},"canonical_sha256":"124ce005c7f724720423b5d69e0f0c89ceb9f561756e21e85b74e44c8ba68120","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"124ce005c7f724720423b5d69e0f0c89ceb9f561756e21e85b74e44c8ba68120","first_computed_at":"2026-05-18T04:29:25.627007Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:25.627007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SW5lH6JmdTZRxYvixdvUO1SP4asFA8uwb5T56lRt88HR0cjerihvjrXxvr9bFeqA0Y9qnv6ywlMT+w8niMCqAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:25.627387Z","signed_message":"canonical_sha256_bytes"},"source_id":"0810.5130","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8184b48b09c5df47605e554d83fac28c04cb347c985f008b9c5b05e45bcbedd2","sha256:356447b386e1ee16915451a09f88325b5c07d8969e5ff71335644ff767e4bb0a"],"state_sha256":"8795b9aa098feb5ca3ee7f377fd40d237ccde103e43271c2b463ffa8760085ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n8XddU/oNGUxTPbpO/U1ImiVgX13nifK1uGo8oOPQZIi9Os1EhXEdd/15YesUH3kdU+ZLHb5fGHH7Z2+x1SeBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T01:35:46.372538Z","bundle_sha256":"bbd8099126e23d59079cc8f39254a8d25476b30b7fcf7f414f218926ce2bff92"}}