{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:DIH6ZN556GTFWEI2AY3IM4CFTR","short_pith_number":"pith:DIH6ZN55","canonical_record":{"source":{"id":"astro-ph/0304305","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-16T13:46:33Z","cross_cats_sorted":[],"title_canon_sha256":"ac8fac5ebaad4640641487cbdcc46d71977bbf63a3c02a22133fd73f7fafdd68","abstract_canon_sha256":"ff4f2ce723ed0322970338c8e8809efc7d2abb858885510e5a3fe81321556484"},"schema_version":"1.0"},"canonical_sha256":"1a0fecb7bdf1a65b111a06368670459c5300dbc809c4c14b800a75efc724d4c4","source":{"kind":"arxiv","id":"astro-ph/0304305","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304305","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304305v1","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304305","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_12","alias_value":"DIH6ZN556GTF","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_16","alias_value":"DIH6ZN556GTFWEI2","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_8","alias_value":"DIH6ZN55","created_at":"2026-07-04T16:36:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:DIH6ZN556GTFWEI2AY3IM4CFTR","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0304305","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-16T13:46:33Z","cross_cats_sorted":[],"title_canon_sha256":"ac8fac5ebaad4640641487cbdcc46d71977bbf63a3c02a22133fd73f7fafdd68","abstract_canon_sha256":"ff4f2ce723ed0322970338c8e8809efc7d2abb858885510e5a3fe81321556484"},"schema_version":"1.0"},"canonical_sha256":"1a0fecb7bdf1a65b111a06368670459c5300dbc809c4c14b800a75efc724d4c4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:36:52.474481Z","signature_b64":"6ED0b+kpnCVLx/BHqth1Tr00qJv6BB/80JU2VRDkMS6h+okRo+OSeMn3ZgQx0A5U43acN35XAiVCsn+4RzinBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a0fecb7bdf1a65b111a06368670459c5300dbc809c4c14b800a75efc724d4c4","last_reissued_at":"2026-07-04T16:36:52.474106Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:36:52.474106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0304305","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":"2026-07-04T16:36:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VzA7IzL4aJX1fgjivkZG0i2V3hZfFreVDpnlhD7fdFcirxq5baCYw+FNF/NVa2ACj61kxTlJq0hA3uHac0+iAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T02:14:40.303089Z"},"content_sha256":"620fd81804df972b0f96d2c98c21659eea36cdd44043504ccc5d7a975fd9b750","schema_version":"1.0","event_id":"sha256:620fd81804df972b0f96d2c98c21659eea36cdd44043504ccc5d7a975fd9b750"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:DIH6ZN556GTFWEI2AY3IM4CFTR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Presence and Distribution of HI Absorbing Gas in Sub-galactic Sized Radio Sources","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.E. Conway (OSO), R.C. Vermeulen (ASTRON), Y.M. Pihlstroem (NRAO)","submitted_at":"2003-04-16T13:46:33Z","abstract_excerpt":"We consider the incidence of HI absorption in intrinsically small sub-galactic sized extragalactic sources selected from sources classified as Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources. We find that the smaller sources (<0.5 kpc) have larger HI column densities than the larger sources (>0.5 kpc). Both a spherical and an axi-symmetric gas distribution, with a radial power law density profile, can be used to explain this anti-correlation between projected linear size and HI column density. Since most detections occur in objects classified as galaxies, we argue that"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304305","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/0304305/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":"2026-07-04T16:36:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VKPp9GQt9plEAhorm5B0DcQYJSEaDjSvYS7NPeIoccxOwTMHHOkmANor/xMQmHuMVB8G4UyxfhaK6CzTJEw8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T02:14:40.303586Z"},"content_sha256":"4fd57a7ae999db3127604ec51633213469734fd4aebbbd783354f8012060f33e","schema_version":"1.0","event_id":"sha256:4fd57a7ae999db3127604ec51633213469734fd4aebbbd783354f8012060f33e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/bundle.json","state_url":"https://pith.science/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/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":"2026-08-17T02:14:40Z","links":{"resolver":"https://pith.science/pith/DIH6ZN556GTFWEI2AY3IM4CFTR","bundle":"https://pith.science/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/bundle.json","state":"https://pith.science/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DIH6ZN556GTFWEI2AY3IM4CFTR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:DIH6ZN556GTFWEI2AY3IM4CFTR","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":"ff4f2ce723ed0322970338c8e8809efc7d2abb858885510e5a3fe81321556484","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-16T13:46:33Z","title_canon_sha256":"ac8fac5ebaad4640641487cbdcc46d71977bbf63a3c02a22133fd73f7fafdd68"},"schema_version":"1.0","source":{"id":"astro-ph/0304305","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304305","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304305v1","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304305","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_12","alias_value":"DIH6ZN556GTF","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_16","alias_value":"DIH6ZN556GTFWEI2","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_8","alias_value":"DIH6ZN55","created_at":"2026-07-04T16:36:52Z"}],"graph_snapshots":[{"event_id":"sha256:4fd57a7ae999db3127604ec51633213469734fd4aebbbd783354f8012060f33e","target":"graph","created_at":"2026-07-04T16:36:52Z","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/0304305/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We consider the incidence of HI absorption in intrinsically small sub-galactic sized extragalactic sources selected from sources classified as Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources. We find that the smaller sources (<0.5 kpc) have larger HI column densities than the larger sources (>0.5 kpc). Both a spherical and an axi-symmetric gas distribution, with a radial power law density profile, can be used to explain this anti-correlation between projected linear size and HI column density. Since most detections occur in objects classified as galaxies, we argue that","authors_text":"J.E. Conway (OSO), R.C. Vermeulen (ASTRON), Y.M. Pihlstroem (NRAO)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-04-16T13:46:33Z","title":"The Presence and Distribution of HI Absorbing Gas in Sub-galactic Sized Radio Sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304305","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":"sha256:620fd81804df972b0f96d2c98c21659eea36cdd44043504ccc5d7a975fd9b750","target":"record","created_at":"2026-07-04T16:36:52Z","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":"ff4f2ce723ed0322970338c8e8809efc7d2abb858885510e5a3fe81321556484","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-16T13:46:33Z","title_canon_sha256":"ac8fac5ebaad4640641487cbdcc46d71977bbf63a3c02a22133fd73f7fafdd68"},"schema_version":"1.0","source":{"id":"astro-ph/0304305","kind":"arxiv","version":1}},"canonical_sha256":"1a0fecb7bdf1a65b111a06368670459c5300dbc809c4c14b800a75efc724d4c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a0fecb7bdf1a65b111a06368670459c5300dbc809c4c14b800a75efc724d4c4","first_computed_at":"2026-07-04T16:36:52.474106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:36:52.474106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6ED0b+kpnCVLx/BHqth1Tr00qJv6BB/80JU2VRDkMS6h+okRo+OSeMn3ZgQx0A5U43acN35XAiVCsn+4RzinBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:36:52.474481Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0304305","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:620fd81804df972b0f96d2c98c21659eea36cdd44043504ccc5d7a975fd9b750","sha256:4fd57a7ae999db3127604ec51633213469734fd4aebbbd783354f8012060f33e"],"state_sha256":"301166e83af79bdde4fb9b8166776418dc8f60ee5434d7c46b58f93bdb4606a7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uLJ2/4/arO9HyAqwaF3E054TsSfOOyH5uDdoAJ09khYBAcQm8m1z+vuQGq1KbQS5ANi1STIU7kAXF868sEygCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T02:14:40.307752Z","bundle_sha256":"804deee1e399e0500b7f1080d4f03f26ce673bac8afe7ddfeae9be2610d5576d"}}