{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:7PMGDQ5STDOWBIQQCUDA74JYBB","short_pith_number":"pith:7PMGDQ5S","canonical_record":{"source":{"id":"astro-ph/0304291","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-15T21:06:26Z","cross_cats_sorted":[],"title_canon_sha256":"702e33f338f6fcbd5344cb9d91ec716e2b9e024027d9e36f5faac8770d6a3036","abstract_canon_sha256":"e7161cb7215fd04f35afd8ac800d313775bc4ffc7f5d6bda6d43ddc49c90d6e7"},"schema_version":"1.0"},"canonical_sha256":"fbd861c3b298dd60a21015060ff138085203803260ee735d7f408ccca4b8f991","source":{"kind":"arxiv","id":"astro-ph/0304291","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304291","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304291v1","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304291","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_12","alias_value":"7PMGDQ5STDOW","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_16","alias_value":"7PMGDQ5STDOWBIQQ","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_8","alias_value":"7PMGDQ5S","created_at":"2026-07-04T16:36:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:7PMGDQ5STDOWBIQQCUDA74JYBB","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0304291","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-15T21:06:26Z","cross_cats_sorted":[],"title_canon_sha256":"702e33f338f6fcbd5344cb9d91ec716e2b9e024027d9e36f5faac8770d6a3036","abstract_canon_sha256":"e7161cb7215fd04f35afd8ac800d313775bc4ffc7f5d6bda6d43ddc49c90d6e7"},"schema_version":"1.0"},"canonical_sha256":"fbd861c3b298dd60a21015060ff138085203803260ee735d7f408ccca4b8f991","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:36:52.101940Z","signature_b64":"txrg4DV4L5dAATqtjOgc1IR7HFOXnqv1JSQb0jfn52aZW9Nqj2OEF7BejKmDa75wXjz4Ey1nRS3fnGAfPafYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fbd861c3b298dd60a21015060ff138085203803260ee735d7f408ccca4b8f991","last_reissued_at":"2026-07-04T16:36:52.101531Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:36:52.101531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0304291","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":"DAlqcfzxZ7KFiT2TO+jwz99w+AJp/FystcWTZ0Eg11PZgFxGnLwfaqwhY6dINVEn8ZPsTBsZPMFQp41479q1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T00:22:22.017563Z"},"content_sha256":"62a371b0fde6d8e28af18bc471e633447221b32e2939596b37dcd47f4c8c6056","schema_version":"1.0","event_id":"sha256:62a371b0fde6d8e28af18bc471e633447221b32e2939596b37dcd47f4c8c6056"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:7PMGDQ5STDOWBIQQCUDA74JYBB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations of HI Absorbing Gas in Compact Radio Sources at Cosmological Redshifts","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C.P. O'Dea, G.B. Taylor, G.K. Miley, H.J.A. Roettgering, I.A.G. Snellen, J.E. Conway, M.N. Bremer, P.D. Barthel, R. Braun, R.C. Vermeulen, R.T. Schilizzi, S.A. Baum, W.H. de Vries, W. Tschager, Y.M. Pihlstroem","submitted_at":"2003-04-15T21:06:26Z","abstract_excerpt":"We present an overview of the occurrence and properties of atomic gas associated with compact radio sources at redshifts up to z=0.85. Searches for HI 21cm absorption were made with the Westerbork Synthesis Radio Telescope at UHF-high frequencies (725-1200 MHz). Detections were obtained for 19 of the 57 sources with usable spectra (33%). We have found a large range in line depths, from tau=0.16 to tau<=0.001. There is a substantial variety of line profiles, including Gaussians of less than 10km/s, to more typically 150km/s, as well as irregular and multi-peaked absorption profiles, sometimes s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304291","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/0304291/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":"5LRBdzPjD6TT4YSCJM/IArtDBxVCXz38eWUmM2x+d5vwzkkRO6G0mXCuQqbUrIqcxb6bPfVsoGAfkElSKTzIDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T00:22:22.018194Z"},"content_sha256":"59262ce73773915c510a13708d3342682c9d9b5ce9b54993a72ce1f9c95288a4","schema_version":"1.0","event_id":"sha256:59262ce73773915c510a13708d3342682c9d9b5ce9b54993a72ce1f9c95288a4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/bundle.json","state_url":"https://pith.science/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/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":"2026-08-03T00:22:22Z","links":{"resolver":"https://pith.science/pith/7PMGDQ5STDOWBIQQCUDA74JYBB","bundle":"https://pith.science/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/bundle.json","state":"https://pith.science/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7PMGDQ5STDOWBIQQCUDA74JYBB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:7PMGDQ5STDOWBIQQCUDA74JYBB","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":"e7161cb7215fd04f35afd8ac800d313775bc4ffc7f5d6bda6d43ddc49c90d6e7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-15T21:06:26Z","title_canon_sha256":"702e33f338f6fcbd5344cb9d91ec716e2b9e024027d9e36f5faac8770d6a3036"},"schema_version":"1.0","source":{"id":"astro-ph/0304291","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304291","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304291v1","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304291","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_12","alias_value":"7PMGDQ5STDOW","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_16","alias_value":"7PMGDQ5STDOWBIQQ","created_at":"2026-07-04T16:36:52Z"},{"alias_kind":"pith_short_8","alias_value":"7PMGDQ5S","created_at":"2026-07-04T16:36:52Z"}],"graph_snapshots":[{"event_id":"sha256:59262ce73773915c510a13708d3342682c9d9b5ce9b54993a72ce1f9c95288a4","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/0304291/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an overview of the occurrence and properties of atomic gas associated with compact radio sources at redshifts up to z=0.85. Searches for HI 21cm absorption were made with the Westerbork Synthesis Radio Telescope at UHF-high frequencies (725-1200 MHz). Detections were obtained for 19 of the 57 sources with usable spectra (33%). We have found a large range in line depths, from tau=0.16 to tau<=0.001. There is a substantial variety of line profiles, including Gaussians of less than 10km/s, to more typically 150km/s, as well as irregular and multi-peaked absorption profiles, sometimes s","authors_text":"C.P. O'Dea, G.B. Taylor, G.K. Miley, H.J.A. Roettgering, I.A.G. Snellen, J.E. Conway, M.N. Bremer, P.D. Barthel, R. Braun, R.C. Vermeulen, R.T. Schilizzi, S.A. Baum, W.H. de Vries, W. Tschager, Y.M. Pihlstroem","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-04-15T21:06:26Z","title":"Observations of HI Absorbing Gas in Compact Radio Sources at Cosmological Redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304291","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":"sha256:62a371b0fde6d8e28af18bc471e633447221b32e2939596b37dcd47f4c8c6056","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":"e7161cb7215fd04f35afd8ac800d313775bc4ffc7f5d6bda6d43ddc49c90d6e7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-04-15T21:06:26Z","title_canon_sha256":"702e33f338f6fcbd5344cb9d91ec716e2b9e024027d9e36f5faac8770d6a3036"},"schema_version":"1.0","source":{"id":"astro-ph/0304291","kind":"arxiv","version":1}},"canonical_sha256":"fbd861c3b298dd60a21015060ff138085203803260ee735d7f408ccca4b8f991","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbd861c3b298dd60a21015060ff138085203803260ee735d7f408ccca4b8f991","first_computed_at":"2026-07-04T16:36:52.101531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:36:52.101531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"txrg4DV4L5dAATqtjOgc1IR7HFOXnqv1JSQb0jfn52aZW9Nqj2OEF7BejKmDa75wXjz4Ey1nRS3fnGAfPafYCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:36:52.101940Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0304291","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62a371b0fde6d8e28af18bc471e633447221b32e2939596b37dcd47f4c8c6056","sha256:59262ce73773915c510a13708d3342682c9d9b5ce9b54993a72ce1f9c95288a4"],"state_sha256":"5724e44b7e943fddff2c0d3832b5cfde57bdb9e775ed017ad568354958a8cf7e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JqhXPSKJxovSr8jTdLHW+JEzFSFcj+MPwou+CrTjRm5XJjqLWccKxsKFTWYw/Rukjn4KbdygYIEX+pvkYFMlBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T00:22:22.023592Z","bundle_sha256":"29bad9b848fd2c62139d7105ddf2300c86ea4667cee6674f182b6d44900c0e9a"}}