{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:CSF7ZX4DIWA52TBPI23Y6P2PYK","short_pith_number":"pith:CSF7ZX4D","canonical_record":{"source":{"id":"astro-ph/0703279","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-12T18:03:53Z","cross_cats_sorted":[],"title_canon_sha256":"c41d6c8663b29e4b54d9e2fed4298c755fcdc5d767b1fcd7dc14f94d2215554d","abstract_canon_sha256":"6889fff8e982af1fee5c3523567433ee7cef6633bcac164c139309ab4cf0e53f"},"schema_version":"1.0"},"canonical_sha256":"148bfcdf834581dd4c2f46b78f3f4fc2b772495d4dd9c78d38da0362e2d57767","source":{"kind":"arxiv","id":"astro-ph/0703279","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0703279","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703279v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703279","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"CSF7ZX4DIWA5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"CSF7ZX4DIWA52TBP","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"CSF7ZX4D","created_at":"2026-05-18T12:25:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:CSF7ZX4DIWA52TBPI23Y6P2PYK","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0703279","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-12T18:03:53Z","cross_cats_sorted":[],"title_canon_sha256":"c41d6c8663b29e4b54d9e2fed4298c755fcdc5d767b1fcd7dc14f94d2215554d","abstract_canon_sha256":"6889fff8e982af1fee5c3523567433ee7cef6633bcac164c139309ab4cf0e53f"},"schema_version":"1.0"},"canonical_sha256":"148bfcdf834581dd4c2f46b78f3f4fc2b772495d4dd9c78d38da0362e2d57767","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:05.742177Z","signature_b64":"rDBLmJZZfu1cCZIOxOpZNCBHbaacR1hff+kMab43oDUViaL6ZSNOW3rIJXmRuH9ASY+AVEZ+ey7SADsCPf5hCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"148bfcdf834581dd4c2f46b78f3f4fc2b772495d4dd9c78d38da0362e2d57767","last_reissued_at":"2026-05-18T04:29:05.741613Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:05.741613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0703279","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N5PE+qxdbxkvl6leFLmVKLCkkusTCugbYvlphFPJo0gEaRSgU5sJ+qg+YCyaOeNOVqCCHslygjU8hjzgEPk+AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T06:36:06.627302Z"},"content_sha256":"7b72891ee70479b2d4244fefd8d3553e23d17cc21e7a632349e5a3cd75f00a3c","schema_version":"1.0","event_id":"sha256:7b72891ee70479b2d4244fefd8d3553e23d17cc21e7a632349e5a3cd75f00a3c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:CSF7ZX4DIWA52TBPI23Y6P2PYK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An HI survey of six Local Group analogs: I. Survey description and the search for high-velocity clouds","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B.K. Gibson, D.G. Barnes, D.J. Pisano, K. Freeman, L. Staveley-Smith, V.A. Kilborn","submitted_at":"2007-03-12T18:03:53Z","abstract_excerpt":"We have conducted an HI 21 cm emission-line survey using the Parkes 20cm multibeam instrument and the Australia Telescope Compact Array (ATCA) of six loose groups of galaxies chosen to be analogs to the Local Group. The goal of this survey is to make a census of the HI-rich galaxies and high-velocity clouds (HVCs) within these groups and compare these populations with those in the Local Group. The Parkes observations covered the entire volume of each group with a rms M(HI) sensitivity of 4-10x10^5 M(sun) per 3.3 km/s channel. All potential sources detected in the Parkes data were confirmed wit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703279","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":"2026-05-18T04:29:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l92h/HrugQT3AeLZKNVrdZIR45Ese5HJbvSy4KwtchOggAcjxcoqybJd92IvW12A80OMbKfauKXSJcBWrrIyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T06:36:06.628044Z"},"content_sha256":"d3dc49227709298f4ab62c4c88b90358c6b7babb57ea2443bdfe28b4a352847f","schema_version":"1.0","event_id":"sha256:d3dc49227709298f4ab62c4c88b90358c6b7babb57ea2443bdfe28b4a352847f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/bundle.json","state_url":"https://pith.science/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/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":"2026-06-11T06:36:06Z","links":{"resolver":"https://pith.science/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK","bundle":"https://pith.science/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/bundle.json","state":"https://pith.science/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CSF7ZX4DIWA52TBPI23Y6P2PYK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:CSF7ZX4DIWA52TBPI23Y6P2PYK","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":"6889fff8e982af1fee5c3523567433ee7cef6633bcac164c139309ab4cf0e53f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-12T18:03:53Z","title_canon_sha256":"c41d6c8663b29e4b54d9e2fed4298c755fcdc5d767b1fcd7dc14f94d2215554d"},"schema_version":"1.0","source":{"id":"astro-ph/0703279","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0703279","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0703279v1","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0703279","created_at":"2026-05-18T04:29:05Z"},{"alias_kind":"pith_short_12","alias_value":"CSF7ZX4DIWA5","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"CSF7ZX4DIWA52TBP","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"CSF7ZX4D","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:d3dc49227709298f4ab62c4c88b90358c6b7babb57ea2443bdfe28b4a352847f","target":"graph","created_at":"2026-05-18T04:29:05Z","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 have conducted an HI 21 cm emission-line survey using the Parkes 20cm multibeam instrument and the Australia Telescope Compact Array (ATCA) of six loose groups of galaxies chosen to be analogs to the Local Group. The goal of this survey is to make a census of the HI-rich galaxies and high-velocity clouds (HVCs) within these groups and compare these populations with those in the Local Group. The Parkes observations covered the entire volume of each group with a rms M(HI) sensitivity of 4-10x10^5 M(sun) per 3.3 km/s channel. All potential sources detected in the Parkes data were confirmed wit","authors_text":"B.K. Gibson, D.G. Barnes, D.J. Pisano, K. Freeman, L. Staveley-Smith, V.A. Kilborn","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-03-12T18:03:53Z","title":"An HI survey of six Local Group analogs: I. Survey description and the search for high-velocity clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0703279","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":"sha256:7b72891ee70479b2d4244fefd8d3553e23d17cc21e7a632349e5a3cd75f00a3c","target":"record","created_at":"2026-05-18T04:29:05Z","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":"6889fff8e982af1fee5c3523567433ee7cef6633bcac164c139309ab4cf0e53f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-03-12T18:03:53Z","title_canon_sha256":"c41d6c8663b29e4b54d9e2fed4298c755fcdc5d767b1fcd7dc14f94d2215554d"},"schema_version":"1.0","source":{"id":"astro-ph/0703279","kind":"arxiv","version":1}},"canonical_sha256":"148bfcdf834581dd4c2f46b78f3f4fc2b772495d4dd9c78d38da0362e2d57767","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"148bfcdf834581dd4c2f46b78f3f4fc2b772495d4dd9c78d38da0362e2d57767","first_computed_at":"2026-05-18T04:29:05.741613Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:05.741613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rDBLmJZZfu1cCZIOxOpZNCBHbaacR1hff+kMab43oDUViaL6ZSNOW3rIJXmRuH9ASY+AVEZ+ey7SADsCPf5hCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:05.742177Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0703279","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7b72891ee70479b2d4244fefd8d3553e23d17cc21e7a632349e5a3cd75f00a3c","sha256:d3dc49227709298f4ab62c4c88b90358c6b7babb57ea2443bdfe28b4a352847f"],"state_sha256":"8e22a3cb7eb3a7271f1177053f28e518413f0798c55069fe9c6c58486c92e1e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ppebdvf6A6LsWeHU/fqyB46wxjJTeGnvY4KYlWtY0Nmw6vRGj4YjCBlIvmjCeDGBk+EkiYuu5YPlLx0WU9e9Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T06:36:06.631880Z","bundle_sha256":"d347d818d3604f60b9f8bb8f9503e1d32e8c859a1f870c9a26aec6276ecab0ca"}}