{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:63NA5UV2OJKJVFLCJCNFVT4EJK","short_pith_number":"pith:63NA5UV2","canonical_record":{"source":{"id":"0912.0297","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-01T23:24:08Z","cross_cats_sorted":[],"title_canon_sha256":"f8766062993950457fb503597c32a88d08b456c85fcfd1b36fd296dd71c1ea76","abstract_canon_sha256":"0ff3065346b62b09e7addf4760ba8d943ddf6f1f12b7520a1a6b346de468bdea"},"schema_version":"1.0"},"canonical_sha256":"f6da0ed2ba72549a9562489a5acf844aaa3052eca4c08ed639f971e262f706d1","source":{"kind":"arxiv","id":"0912.0297","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.0297","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"arxiv_version","alias_value":"0912.0297v3","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.0297","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"pith_short_12","alias_value":"63NA5UV2OJKJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"63NA5UV2OJKJVFLC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"63NA5UV2","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:63NA5UV2OJKJVFLCJCNFVT4EJK","target":"record","payload":{"canonical_record":{"source":{"id":"0912.0297","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-01T23:24:08Z","cross_cats_sorted":[],"title_canon_sha256":"f8766062993950457fb503597c32a88d08b456c85fcfd1b36fd296dd71c1ea76","abstract_canon_sha256":"0ff3065346b62b09e7addf4760ba8d943ddf6f1f12b7520a1a6b346de468bdea"},"schema_version":"1.0"},"canonical_sha256":"f6da0ed2ba72549a9562489a5acf844aaa3052eca4c08ed639f971e262f706d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:45.487192Z","signature_b64":"JZ9Rl3zKn0VGXIcy6S/ih6D8NmsYXRDm20eblX62JoraX+7Y7xZ2819HBagebHVxD8aPATXm2RQdRt4xzNMOBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6da0ed2ba72549a9562489a5acf844aaa3052eca4c08ed639f971e262f706d1","last_reissued_at":"2026-05-18T04:27:45.486712Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:45.486712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.0297","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:27:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"12iNBVnWnmOzPmNe0fmituCZGrWpgcmUM6s/3cNKo6wiyGpS0pt25IWDXuiSEcAHrGnoA2BOcB4uIHBMdCG2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:18:14.628387Z"},"content_sha256":"837b0fc8206238e36205112316cefcdd23c3648ed83d07ee46f445dbe900c8f2","schema_version":"1.0","event_id":"sha256:837b0fc8206238e36205112316cefcdd23c3648ed83d07ee46f445dbe900c8f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:63NA5UV2OJKJVFLCJCNFVT4EJK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detection of Diffuse Neutral Intragroup Medium in Hickson Compact Groups","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Lourdes Verdes-Montenegro, Min Su Yun, Sanchayeeta Borthakur","submitted_at":"2009-12-01T23:24:08Z","abstract_excerpt":"We present new Green Bank Telescope (GBT) 21 cm neutral hydrogen (HI) observations of a complete distance limited sample of 22 Hickson Compact Groups (HCGs) with at least four true members. We detected an average HI mass of $8 \\times 10^{9} M_{\\odot}$ (median= $6\\times 10^{9} M_{\\odot}$), which is significantly larger than previous single-dish measurements. Consequently, the HI-deficiencies for these HCGs have been reduced, although not completely eliminated. Spectral comparison of the GBT data with complementary Very Large Array (VLA) data shows significant HI excess in the GBT spectra. The o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.0297","kind":"arxiv","version":3},"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":"2026-05-18T04:27:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MzgEsteVSFvzUGR9wocBVA2jRkvOh7kw8nIN6bHxSEA41P1cpFwE/NTEcu3R3emTm40z+EkyOYWl/nRCJRIYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:18:14.629084Z"},"content_sha256":"c5d175dde9a9f660adc1504c56f17c7f0fbf0a16e68afcc516f92a9f866eba23","schema_version":"1.0","event_id":"sha256:c5d175dde9a9f660adc1504c56f17c7f0fbf0a16e68afcc516f92a9f866eba23"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/bundle.json","state_url":"https://pith.science/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/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":"2026-05-28T21:18:14Z","links":{"resolver":"https://pith.science/pith/63NA5UV2OJKJVFLCJCNFVT4EJK","bundle":"https://pith.science/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/bundle.json","state":"https://pith.science/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/63NA5UV2OJKJVFLCJCNFVT4EJK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:63NA5UV2OJKJVFLCJCNFVT4EJK","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":"0ff3065346b62b09e7addf4760ba8d943ddf6f1f12b7520a1a6b346de468bdea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-01T23:24:08Z","title_canon_sha256":"f8766062993950457fb503597c32a88d08b456c85fcfd1b36fd296dd71c1ea76"},"schema_version":"1.0","source":{"id":"0912.0297","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.0297","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"arxiv_version","alias_value":"0912.0297v3","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.0297","created_at":"2026-05-18T04:27:45Z"},{"alias_kind":"pith_short_12","alias_value":"63NA5UV2OJKJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"63NA5UV2OJKJVFLC","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"63NA5UV2","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:c5d175dde9a9f660adc1504c56f17c7f0fbf0a16e68afcc516f92a9f866eba23","target":"graph","created_at":"2026-05-18T04:27:45Z","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 new Green Bank Telescope (GBT) 21 cm neutral hydrogen (HI) observations of a complete distance limited sample of 22 Hickson Compact Groups (HCGs) with at least four true members. We detected an average HI mass of $8 \\times 10^{9} M_{\\odot}$ (median= $6\\times 10^{9} M_{\\odot}$), which is significantly larger than previous single-dish measurements. Consequently, the HI-deficiencies for these HCGs have been reduced, although not completely eliminated. Spectral comparison of the GBT data with complementary Very Large Array (VLA) data shows significant HI excess in the GBT spectra. The o","authors_text":"Lourdes Verdes-Montenegro, Min Su Yun, Sanchayeeta Borthakur","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-01T23:24:08Z","title":"Detection of Diffuse Neutral Intragroup Medium in Hickson Compact Groups"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.0297","kind":"arxiv","version":3},"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":"sha256:837b0fc8206238e36205112316cefcdd23c3648ed83d07ee46f445dbe900c8f2","target":"record","created_at":"2026-05-18T04:27:45Z","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":"0ff3065346b62b09e7addf4760ba8d943ddf6f1f12b7520a1a6b346de468bdea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-01T23:24:08Z","title_canon_sha256":"f8766062993950457fb503597c32a88d08b456c85fcfd1b36fd296dd71c1ea76"},"schema_version":"1.0","source":{"id":"0912.0297","kind":"arxiv","version":3}},"canonical_sha256":"f6da0ed2ba72549a9562489a5acf844aaa3052eca4c08ed639f971e262f706d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6da0ed2ba72549a9562489a5acf844aaa3052eca4c08ed639f971e262f706d1","first_computed_at":"2026-05-18T04:27:45.486712Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:45.486712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JZ9Rl3zKn0VGXIcy6S/ih6D8NmsYXRDm20eblX62JoraX+7Y7xZ2819HBagebHVxD8aPATXm2RQdRt4xzNMOBw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:45.487192Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.0297","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:837b0fc8206238e36205112316cefcdd23c3648ed83d07ee46f445dbe900c8f2","sha256:c5d175dde9a9f660adc1504c56f17c7f0fbf0a16e68afcc516f92a9f866eba23"],"state_sha256":"b07889789f8eb06cb8d1b84a301bdaf6725aee339bd0c49946bb33a2e6135ae9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"amGuIyP1SDGg8JPsQXtazgNeyBToLUmzRurf64H3gI5qehiUY8cHY4rOzrc9Y18jp7SPPTtnx/o+0iLWmkhBCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:18:14.632698Z","bundle_sha256":"d2f966741cde67278bdb871c872851d6ecd69a5052f29986ec52753d9b6f0558"}}