{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:IQRFP2YS3CMWVVKLT4GM45UIZX","short_pith_number":"pith:IQRFP2YS","canonical_record":{"source":{"id":"astro-ph/0403642","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-03-27T21:55:01Z","cross_cats_sorted":[],"title_canon_sha256":"776bc447702cd2d1ca087df4959dccc4f680c9c410b8ad57a2d95dde7a97e8bd","abstract_canon_sha256":"3abe4943827e4c42224b20e6dffb1d2a09637b345cc3c9e59d07a1311d75879b"},"schema_version":"1.0"},"canonical_sha256":"442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0","source":{"kind":"arxiv","id":"astro-ph/0403642","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0403642","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0403642v1","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0403642","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_12","alias_value":"IQRFP2YS3CMW","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_16","alias_value":"IQRFP2YS3CMWVVKL","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_8","alias_value":"IQRFP2YS","created_at":"2026-07-04T14:13:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:IQRFP2YS3CMWVVKLT4GM45UIZX","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0403642","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-03-27T21:55:01Z","cross_cats_sorted":[],"title_canon_sha256":"776bc447702cd2d1ca087df4959dccc4f680c9c410b8ad57a2d95dde7a97e8bd","abstract_canon_sha256":"3abe4943827e4c42224b20e6dffb1d2a09637b345cc3c9e59d07a1311d75879b"},"schema_version":"1.0"},"canonical_sha256":"442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:13:24.472109Z","signature_b64":"xMrf44tEl9e6fTRdKdPNm6ebOc43xATrJ4vREvvgVacwA6hEXg3D4WB41Fg4O7DMnU9SdxNiGj7MehT9yeLrBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0","last_reissued_at":"2026-07-04T14:13:24.471533Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:13:24.471533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0403642","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":"2026-07-04T14:13:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GrsoG1jysX5RUyyRWg7EeBmbkrJ8raSQKQd+h9x2OGfslDjU9stxqfvv/7MgQi9E/mPOsUyzi/FX+2o7rXdgAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T00:29:23.250588Z"},"content_sha256":"4b5dd4d00ecf09908a6c9aa6cd4161ed5c966fc47a21ca784617bc07376a6d4f","schema_version":"1.0","event_id":"sha256:4b5dd4d00ecf09908a6c9aa6cd4161ed5c966fc47a21ca784617bc07376a6d4f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:IQRFP2YS3CMWVVKLT4GM45UIZX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"21st Century VLBI: Deep Wide-Field Surveys","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"J.M. Wrobel, M.A. Garrett, R. Morganti","submitted_at":"2004-03-27T21:55:01Z","abstract_excerpt":"A 20-hour VLBI observation with the NRAO VLBA and GBT in the NOAO Bootes field reaches an rms noise of 9 microJy per beam at 1.4 GHz. Three sources were detected at 10-milliarcsecond resolution within the GBT primary beam of FWHM 8.6', including the 20-milliJy calibrator and two sub-milliJy sources. By tapering the visibility data, portions of the VLBA primary beam of FWHM 29' were imaged at poorer sensitivity and resolution to yield five further detections. New developments at JIVE will permit deeper and wider VLBI surveys at full sensitivity and resolution, enabling new types of survey scien"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0403642","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/0403642/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":"2026-07-04T14:13:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w0ss7h8TEMbcDtBqFf05j/dzfH+3qHyubHHxLQudeKNFNO317SF3bNvp0Qz3AikKcrq6vrsyxioHSP8N4Qu+Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T00:29:23.251093Z"},"content_sha256":"fde4aa012fba409cd2938580af3ce6af15c10b29dc3e7c547bbc5e567986c0db","schema_version":"1.0","event_id":"sha256:fde4aa012fba409cd2938580af3ce6af15c10b29dc3e7c547bbc5e567986c0db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/bundle.json","state_url":"https://pith.science/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/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":"2026-08-05T00:29:23Z","links":{"resolver":"https://pith.science/pith/IQRFP2YS3CMWVVKLT4GM45UIZX","bundle":"https://pith.science/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/bundle.json","state":"https://pith.science/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IQRFP2YS3CMWVVKLT4GM45UIZX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:IQRFP2YS3CMWVVKLT4GM45UIZX","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":"3abe4943827e4c42224b20e6dffb1d2a09637b345cc3c9e59d07a1311d75879b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-03-27T21:55:01Z","title_canon_sha256":"776bc447702cd2d1ca087df4959dccc4f680c9c410b8ad57a2d95dde7a97e8bd"},"schema_version":"1.0","source":{"id":"astro-ph/0403642","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0403642","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0403642v1","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0403642","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_12","alias_value":"IQRFP2YS3CMW","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_16","alias_value":"IQRFP2YS3CMWVVKL","created_at":"2026-07-04T14:13:24Z"},{"alias_kind":"pith_short_8","alias_value":"IQRFP2YS","created_at":"2026-07-04T14:13:24Z"}],"graph_snapshots":[{"event_id":"sha256:fde4aa012fba409cd2938580af3ce6af15c10b29dc3e7c547bbc5e567986c0db","target":"graph","created_at":"2026-07-04T14:13:24Z","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/0403642/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A 20-hour VLBI observation with the NRAO VLBA and GBT in the NOAO Bootes field reaches an rms noise of 9 microJy per beam at 1.4 GHz. Three sources were detected at 10-milliarcsecond resolution within the GBT primary beam of FWHM 8.6', including the 20-milliJy calibrator and two sub-milliJy sources. By tapering the visibility data, portions of the VLBA primary beam of FWHM 29' were imaged at poorer sensitivity and resolution to yield five further detections. New developments at JIVE will permit deeper and wider VLBI surveys at full sensitivity and resolution, enabling new types of survey scien","authors_text":"J.M. Wrobel, M.A. Garrett, R. Morganti","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-03-27T21:55:01Z","title":"21st Century VLBI: Deep Wide-Field Surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0403642","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":"sha256:4b5dd4d00ecf09908a6c9aa6cd4161ed5c966fc47a21ca784617bc07376a6d4f","target":"record","created_at":"2026-07-04T14:13:24Z","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":"3abe4943827e4c42224b20e6dffb1d2a09637b345cc3c9e59d07a1311d75879b","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-03-27T21:55:01Z","title_canon_sha256":"776bc447702cd2d1ca087df4959dccc4f680c9c410b8ad57a2d95dde7a97e8bd"},"schema_version":"1.0","source":{"id":"astro-ph/0403642","kind":"arxiv","version":1}},"canonical_sha256":"442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"442257eb12d8996ad54b9f0cce7688cdf6a490252e0ab10608e37c7862ff16a0","first_computed_at":"2026-07-04T14:13:24.471533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:13:24.471533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xMrf44tEl9e6fTRdKdPNm6ebOc43xATrJ4vREvvgVacwA6hEXg3D4WB41Fg4O7DMnU9SdxNiGj7MehT9yeLrBw==","signature_status":"signed_v1","signed_at":"2026-07-04T14:13:24.472109Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0403642","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4b5dd4d00ecf09908a6c9aa6cd4161ed5c966fc47a21ca784617bc07376a6d4f","sha256:fde4aa012fba409cd2938580af3ce6af15c10b29dc3e7c547bbc5e567986c0db"],"state_sha256":"f949d3d9321858738cd384f44c0ea0b867588bed33c49527993c78c9752e3c94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"39IrLe6AWTtkhEJM9+o5etT2ixa2khmGkLRB721u/pkjV4HsT0t233FKoHhC03NWDxBMBXkVvgq+a6D+HCzwAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T00:29:23.278216Z","bundle_sha256":"384e0b14045bf289bf3c497a86a67da7e418d9a9cb4c6751cdf2c7da204e45c5"}}