{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:DNOLPNDYMTOFZA57OH6LNA5MWH","short_pith_number":"pith:DNOLPNDY","canonical_record":{"source":{"id":"1108.2364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-11T10:12:06Z","cross_cats_sorted":[],"title_canon_sha256":"392a02daacf2cc405b139cc61466c11e58ea4a05d724c38254fe2677eb78c00a","abstract_canon_sha256":"ac2b4c8efd3754c52e63939e18de74d1083cb250944438c784be15192611c53b"},"schema_version":"1.0"},"canonical_sha256":"1b5cb7b47864dc5c83bf71fcb683acb1fd1ba72b9de71a0cc83b7b19040f6fa5","source":{"kind":"arxiv","id":"1108.2364","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.2364","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"arxiv_version","alias_value":"1108.2364v1","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.2364","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"pith_short_12","alias_value":"DNOLPNDYMTOF","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DNOLPNDYMTOFZA57","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DNOLPNDY","created_at":"2026-05-18T12:26:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:DNOLPNDYMTOFZA57OH6LNA5MWH","target":"record","payload":{"canonical_record":{"source":{"id":"1108.2364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-11T10:12:06Z","cross_cats_sorted":[],"title_canon_sha256":"392a02daacf2cc405b139cc61466c11e58ea4a05d724c38254fe2677eb78c00a","abstract_canon_sha256":"ac2b4c8efd3754c52e63939e18de74d1083cb250944438c784be15192611c53b"},"schema_version":"1.0"},"canonical_sha256":"1b5cb7b47864dc5c83bf71fcb683acb1fd1ba72b9de71a0cc83b7b19040f6fa5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:55.331533Z","signature_b64":"rCrXvcz0CN01EqqLKPBYcwOtaHcqRytfMjqnx6MFWmp4Bn0IwMYn26ZgFc2+wPLiSbEfYA65qYYRLBVih6WgBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b5cb7b47864dc5c83bf71fcb683acb1fd1ba72b9de71a0cc83b7b19040f6fa5","last_reissued_at":"2026-05-18T02:00:55.330879Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:55.330879Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.2364","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":"2026-05-18T02:00:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"spZDHnyavYRzx0A9OeQOp3EqEJkCM5m9y7ozNiqFepbev4HoHDBxrDIPk5iKHWG5/LTI178GnS+tPAAc4K55Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:29:08.987516Z"},"content_sha256":"de678b71f0bdfc2d2b566d07e94fd836c8a5e8bafae4210c970e72c80766d4f7","schema_version":"1.0","event_id":"sha256:de678b71f0bdfc2d2b566d07e94fd836c8a5e8bafae4210c970e72c80766d4f7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:DNOLPNDYMTOFZA57OH6LNA5MWH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Diffuse neutral hydrogen in the HI Parkes All Sky Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Popping, R. Braun","submitted_at":"2011-08-11T10:12:06Z","abstract_excerpt":"Observations of neutral hydrogen can provide a wealth of information about the distribution and kinematics of galaxies. To detect HI beyond the ionisation edge of galaxy disks, column density sensitivities have to be achieved that probe the regime of Lyman limit systems. Typically HI observations are limited to a brightness sensitivity of NHI~10^19 cm-2 but this has to be improved by at least an order of magnitude. In this paper, reprocessed data is presented that was originally observed for the HI Parkes All Sky Survey (HIPASS). HIPASS provides complete coverage of the region that has been ob"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.2364","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":"2026-05-18T02:00:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cmtyS6fblQIrtSP0WgelD7WMBpzuT8uY5ViLJmFrEi6LjqS57VG2wj4iT4dpme31tYBAEVIPOrIsNpenEvH1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:29:08.987877Z"},"content_sha256":"a11e688799079cdf6b83cb70fe20e5ca8a0bc4e124be15ef9091de3b94bdcaac","schema_version":"1.0","event_id":"sha256:a11e688799079cdf6b83cb70fe20e5ca8a0bc4e124be15ef9091de3b94bdcaac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/bundle.json","state_url":"https://pith.science/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/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":"2026-05-28T03:29:08Z","links":{"resolver":"https://pith.science/pith/DNOLPNDYMTOFZA57OH6LNA5MWH","bundle":"https://pith.science/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/bundle.json","state":"https://pith.science/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DNOLPNDYMTOFZA57OH6LNA5MWH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:DNOLPNDYMTOFZA57OH6LNA5MWH","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":"ac2b4c8efd3754c52e63939e18de74d1083cb250944438c784be15192611c53b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-11T10:12:06Z","title_canon_sha256":"392a02daacf2cc405b139cc61466c11e58ea4a05d724c38254fe2677eb78c00a"},"schema_version":"1.0","source":{"id":"1108.2364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.2364","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"arxiv_version","alias_value":"1108.2364v1","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.2364","created_at":"2026-05-18T02:00:55Z"},{"alias_kind":"pith_short_12","alias_value":"DNOLPNDYMTOF","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_16","alias_value":"DNOLPNDYMTOFZA57","created_at":"2026-05-18T12:26:26Z"},{"alias_kind":"pith_short_8","alias_value":"DNOLPNDY","created_at":"2026-05-18T12:26:26Z"}],"graph_snapshots":[{"event_id":"sha256:a11e688799079cdf6b83cb70fe20e5ca8a0bc4e124be15ef9091de3b94bdcaac","target":"graph","created_at":"2026-05-18T02:00:55Z","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":"Observations of neutral hydrogen can provide a wealth of information about the distribution and kinematics of galaxies. To detect HI beyond the ionisation edge of galaxy disks, column density sensitivities have to be achieved that probe the regime of Lyman limit systems. Typically HI observations are limited to a brightness sensitivity of NHI~10^19 cm-2 but this has to be improved by at least an order of magnitude. In this paper, reprocessed data is presented that was originally observed for the HI Parkes All Sky Survey (HIPASS). HIPASS provides complete coverage of the region that has been ob","authors_text":"A. Popping, R. Braun","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-11T10:12:06Z","title":"Diffuse neutral hydrogen in the HI Parkes All Sky Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.2364","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:de678b71f0bdfc2d2b566d07e94fd836c8a5e8bafae4210c970e72c80766d4f7","target":"record","created_at":"2026-05-18T02:00:55Z","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":"ac2b4c8efd3754c52e63939e18de74d1083cb250944438c784be15192611c53b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-08-11T10:12:06Z","title_canon_sha256":"392a02daacf2cc405b139cc61466c11e58ea4a05d724c38254fe2677eb78c00a"},"schema_version":"1.0","source":{"id":"1108.2364","kind":"arxiv","version":1}},"canonical_sha256":"1b5cb7b47864dc5c83bf71fcb683acb1fd1ba72b9de71a0cc83b7b19040f6fa5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b5cb7b47864dc5c83bf71fcb683acb1fd1ba72b9de71a0cc83b7b19040f6fa5","first_computed_at":"2026-05-18T02:00:55.330879Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:55.330879Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rCrXvcz0CN01EqqLKPBYcwOtaHcqRytfMjqnx6MFWmp4Bn0IwMYn26ZgFc2+wPLiSbEfYA65qYYRLBVih6WgBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:55.331533Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.2364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:de678b71f0bdfc2d2b566d07e94fd836c8a5e8bafae4210c970e72c80766d4f7","sha256:a11e688799079cdf6b83cb70fe20e5ca8a0bc4e124be15ef9091de3b94bdcaac"],"state_sha256":"dc6e3a13fdec9e5cc3c11227776526fc7da868a9ebe927fb6ac7529b20485b14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"joB0/wLbsZ9icx73clq8XpcevDtjxEYRiuzYlbqkJgxjU6c0vvTW29O6aMP/2l2oXfUEr6et9rgl92BXdt3XCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:29:08.990003Z","bundle_sha256":"f5e2a5774a5880565cecd3b861bb278622fd5dc57277bcc0d02450b31e27ca89"}}