{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:GBIG5YQRUCGZRIR4HPBONMOFMC","short_pith_number":"pith:GBIG5YQR","canonical_record":{"source":{"id":"astro-ph/0005267","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-12T06:12:22Z","cross_cats_sorted":[],"title_canon_sha256":"b6104130db2249e2b53df3756d02543b419ed27be15087c257cd3bd0d8c67f73","abstract_canon_sha256":"1e0f83ee0625d6d35af44629b9cac2dda8da8bcb5fcb1301fc3f02980476526f"},"schema_version":"1.0"},"canonical_sha256":"30506ee211a08d98a23c3bc2e6b1c560aa850109ee55315e8fa843699f2a791e","source":{"kind":"arxiv","id":"astro-ph/0005267","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0005267","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0005267v1","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0005267","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_12","alias_value":"GBIG5YQRUCGZ","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_16","alias_value":"GBIG5YQRUCGZRIR4","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_8","alias_value":"GBIG5YQR","created_at":"2026-07-04T16:16:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:GBIG5YQRUCGZRIR4HPBONMOFMC","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0005267","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-12T06:12:22Z","cross_cats_sorted":[],"title_canon_sha256":"b6104130db2249e2b53df3756d02543b419ed27be15087c257cd3bd0d8c67f73","abstract_canon_sha256":"1e0f83ee0625d6d35af44629b9cac2dda8da8bcb5fcb1301fc3f02980476526f"},"schema_version":"1.0"},"canonical_sha256":"30506ee211a08d98a23c3bc2e6b1c560aa850109ee55315e8fa843699f2a791e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:16:39.627362Z","signature_b64":"cWd1YM+zz8jrlOSJfqBwrXgRIEw3C57IQuJG9NEMmEA8RrN15migJS5kIKqF5Wrlke6FN7OB8T8dFJhP8igZAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"30506ee211a08d98a23c3bc2e6b1c560aa850109ee55315e8fa843699f2a791e","last_reissued_at":"2026-07-04T16:16:39.626928Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:16:39.626928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0005267","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":"2026-07-04T16:16:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z5IKljUkULCw5Ep7xM37GFcfiY8jLMqBOrdTZignkbE33BGvJJdf7X7/bVKK/UTIL7262FBmpJiCDaY8k+MYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T04:07:31.433736Z"},"content_sha256":"06b22bebf7d16baa82c024c738d3c2938f3ce9c537aec1515467b96364d67ee9","schema_version":"1.0","event_id":"sha256:06b22bebf7d16baa82c024c738d3c2938f3ce9c537aec1515467b96364d67ee9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:GBIG5YQRUCGZRIR4HPBONMOFMC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Extragalactic HI Cloud with No Optical Counterpart?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. E. Wright, B. K. Gibson, B. Koribalski, D. F. Malin, E. M. Sadler, F. Stootman, G. D. Banks, H. Jerjen, I. Stewart, J. R. Mould, K. C. Freeman, L. Staveley-Smith, M. E. Putman, M. J. Disney, M. J. Drinkwater, M. Marquarding, P. A. Henning, P. J. Boyce, P. M. Knezek, R. Bhathal, R. D. Ekers, R. F. Minchin, R. L. Webster, R. M. Price, S. D. Ryder, T. Oosterloo, V. A. Kilborn, W. J. G. de Blok","submitted_at":"2000-05-12T06:12:22Z","abstract_excerpt":"We report the discovery, from the HI Parkes All-Sky Survey (HIPASS), of an isolated cloud of neutral hydrogen which we believe to be extragalactic. The HI mass of the cloud (HIPASS J1712-64) is very low, 1.7 x 10^7 Msun, using an estimated distance of ~3.2 Mpc. Most significantly, we have found no optical companion to this object to very faint limits (mu(B)~ 27 mag arcsec^-2). HIPASS J1712-64 appears to be a binary system similar to, but much less massive than, HI 1225+01 (the Virgo HI Cloud) and has a size of at least 15 kpc. The mean velocity dispersion, measured with the Australia Telescope"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0005267","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0005267/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:16:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zykflTrYVnOLtTiX9XZKK1Z+hnvziCUjzzTJpH3B/zvKLIAzgE/AFW08zykA3OH4rymYGUX+Vf0i81t+VLKkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T04:07:31.436276Z"},"content_sha256":"b7860e47d4f9ee2694a34c49cca30474d7fc26a1301520c5e80b457c842d827c","schema_version":"1.0","event_id":"sha256:b7860e47d4f9ee2694a34c49cca30474d7fc26a1301520c5e80b457c842d827c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/bundle.json","state_url":"https://pith.science/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/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":"2026-08-07T04:07:31Z","links":{"resolver":"https://pith.science/pith/GBIG5YQRUCGZRIR4HPBONMOFMC","bundle":"https://pith.science/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/bundle.json","state":"https://pith.science/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GBIG5YQRUCGZRIR4HPBONMOFMC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:GBIG5YQRUCGZRIR4HPBONMOFMC","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":"1e0f83ee0625d6d35af44629b9cac2dda8da8bcb5fcb1301fc3f02980476526f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-12T06:12:22Z","title_canon_sha256":"b6104130db2249e2b53df3756d02543b419ed27be15087c257cd3bd0d8c67f73"},"schema_version":"1.0","source":{"id":"astro-ph/0005267","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0005267","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0005267v1","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0005267","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_12","alias_value":"GBIG5YQRUCGZ","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_16","alias_value":"GBIG5YQRUCGZRIR4","created_at":"2026-07-04T16:16:39Z"},{"alias_kind":"pith_short_8","alias_value":"GBIG5YQR","created_at":"2026-07-04T16:16:39Z"}],"graph_snapshots":[{"event_id":"sha256:b7860e47d4f9ee2694a34c49cca30474d7fc26a1301520c5e80b457c842d827c","target":"graph","created_at":"2026-07-04T16:16:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0005267/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the discovery, from the HI Parkes All-Sky Survey (HIPASS), of an isolated cloud of neutral hydrogen which we believe to be extragalactic. The HI mass of the cloud (HIPASS J1712-64) is very low, 1.7 x 10^7 Msun, using an estimated distance of ~3.2 Mpc. Most significantly, we have found no optical companion to this object to very faint limits (mu(B)~ 27 mag arcsec^-2). HIPASS J1712-64 appears to be a binary system similar to, but much less massive than, HI 1225+01 (the Virgo HI Cloud) and has a size of at least 15 kpc. The mean velocity dispersion, measured with the Australia Telescope","authors_text":"A. E. Wright, B. K. Gibson, B. Koribalski, D. F. Malin, E. M. Sadler, F. Stootman, G. D. Banks, H. Jerjen, I. Stewart, J. R. Mould, K. C. Freeman, L. Staveley-Smith, M. E. Putman, M. J. Disney, M. J. Drinkwater, M. Marquarding, P. A. Henning, P. J. Boyce, P. M. Knezek, R. Bhathal, R. D. Ekers, R. F. Minchin, R. L. Webster, R. M. Price, S. D. Ryder, T. Oosterloo, V. A. Kilborn, W. J. G. de Blok","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-05-12T06:12:22Z","title":"An Extragalactic HI Cloud with No Optical Counterpart?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0005267","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":"sha256:06b22bebf7d16baa82c024c738d3c2938f3ce9c537aec1515467b96364d67ee9","target":"record","created_at":"2026-07-04T16:16:39Z","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":"1e0f83ee0625d6d35af44629b9cac2dda8da8bcb5fcb1301fc3f02980476526f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-05-12T06:12:22Z","title_canon_sha256":"b6104130db2249e2b53df3756d02543b419ed27be15087c257cd3bd0d8c67f73"},"schema_version":"1.0","source":{"id":"astro-ph/0005267","kind":"arxiv","version":1}},"canonical_sha256":"30506ee211a08d98a23c3bc2e6b1c560aa850109ee55315e8fa843699f2a791e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"30506ee211a08d98a23c3bc2e6b1c560aa850109ee55315e8fa843699f2a791e","first_computed_at":"2026-07-04T16:16:39.626928Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:16:39.626928Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cWd1YM+zz8jrlOSJfqBwrXgRIEw3C57IQuJG9NEMmEA8RrN15migJS5kIKqF5Wrlke6FN7OB8T8dFJhP8igZAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:16:39.627362Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0005267","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06b22bebf7d16baa82c024c738d3c2938f3ce9c537aec1515467b96364d67ee9","sha256:b7860e47d4f9ee2694a34c49cca30474d7fc26a1301520c5e80b457c842d827c"],"state_sha256":"ebf63bf0065fcf992e8c9a2a9d4ca3d3ff191d4307c1f9926f32a04ef9edc077"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cPBCB9JveYUt0MVZYVGX4+7hAvvKufmCpzQvLYr2HoDlZW4SGUnUZfE2DiESUyGPseHf03xN9vo7N7BVCGmfAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T04:07:31.452595Z","bundle_sha256":"c3c4c78dad53f8d5c0038f2904e69c4d2222f54409f3c4c6ce9a3d90261863de"}}