{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:VR3MBC5ALVRVR4XHHQDD4IQGZ4","short_pith_number":"pith:VR3MBC5A","canonical_record":{"source":{"id":"1911.00656","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-02T05:27:42Z","cross_cats_sorted":[],"title_canon_sha256":"5ded609d5997c8204e37f7bf5eba32395ccd4430a5fdd43cb8db230e36efdb26","abstract_canon_sha256":"e28a2d6a2df176fab257bf0f97dba9c932611425605524f5b68300470416bd42"},"schema_version":"1.0"},"canonical_sha256":"ac76c08ba05d6358f2e73c063e2206cf2b3dc62b88ead871657d65fe92073447","source":{"kind":"arxiv","id":"1911.00656","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.00656","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"arxiv_version","alias_value":"1911.00656v1","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.00656","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_12","alias_value":"VR3MBC5ALVRV","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_16","alias_value":"VR3MBC5ALVRVR4XH","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_8","alias_value":"VR3MBC5A","created_at":"2026-07-05T00:55:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:VR3MBC5ALVRVR4XHHQDD4IQGZ4","target":"record","payload":{"canonical_record":{"source":{"id":"1911.00656","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-02T05:27:42Z","cross_cats_sorted":[],"title_canon_sha256":"5ded609d5997c8204e37f7bf5eba32395ccd4430a5fdd43cb8db230e36efdb26","abstract_canon_sha256":"e28a2d6a2df176fab257bf0f97dba9c932611425605524f5b68300470416bd42"},"schema_version":"1.0"},"canonical_sha256":"ac76c08ba05d6358f2e73c063e2206cf2b3dc62b88ead871657d65fe92073447","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:55:05.432682Z","signature_b64":"8Qhw3Dr5bZ4cVu9maSINH4nrZ1SRrqgiKjvDIjWN5G2BWCtGeLDyMQ2zHjP3DlUNfLrp3qQuuwqHti8hc5+IAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac76c08ba05d6358f2e73c063e2206cf2b3dc62b88ead871657d65fe92073447","last_reissued_at":"2026-07-05T00:55:05.432196Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:55:05.432196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.00656","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":"2026-07-05T00:55:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L93ii9Nkdp8ET1eJ1kphjd+rWhq+h37YT57GdXv0lF2B1XVgZpArkBMiRD7l3Kr3M8lsJunHTvonTemA+fsHDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:30:10.747590Z"},"content_sha256":"99e4abde0863e04256e72edb06d94429f696e300346c658ebd6bf1b87945177a","schema_version":"1.0","event_id":"sha256:99e4abde0863e04256e72edb06d94429f696e300346c658ebd6bf1b87945177a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:VR3MBC5ALVRVR4XHHQDD4IQGZ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An ultra-wide bandwidth (704 to 4032 MHz) receiver for the Parkes radio telescope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Ahmed, A. D. Cameron, A. Dunning, A. Jameson, A. K. Tzioumis, B. Dong, B. Preisig, B. T. Indermuehle, C. J. Phillips, D. A. Craig, D. B. Hayman, D. C.-J. Bock, D. C. Price, D. George, E. Carretti, E. M. Sadler, G. Hobbs, H. Kanoniuk, J. A. Green, J. Dempsey, J. E. Reynolds, J. F. Kaczmarek, J. L. Han, J. R. Dawson, J. Sarkissian, J. Tuthill, K. Jeganathan, K. Reeves, K. W. Smart, L. Reilly, L. Staveley-Smith, L. Toomey, L. Wen, M. Bailes, M. Bourne, M. Bowen, M. Brothers, M. Kesteven, M. Kramer, M. Leach, M. Marquarding, M. Smith, M. T. Whiting, N. Carter, N. C. Pope, N. D. R. Bhat, N. Wang, P. Doherty, P. G. Edwards, P. Roberts, P. Roush, R. Beresford, R. Chekkala, R. M. Shannon, R. N. Manchester, S. Castillo, S. Dai, S. Johnston, S. L. Smith. C. Sobey, S. Mader, S. Oslowski, S. Severs, S. W. Amy, T. Ergesh, T. Robishaw, T. Ruckley, V. A. Moss, V. J. McIntyre, W. Cheng, W. van Straten, X. Y. Gao, Y. Chung","submitted_at":"2019-11-02T05:27:42Z","abstract_excerpt":"We describe an ultra-wide-bandwidth, low-frequency receiver (\"UWL\") recently installed on the Parkes radio telescope. The receiver system provides continuous frequency coverage from 704 to 4032 MHz. For much of the band (~60%) the system temperature is approximately 22K and the receiver system remains in a linear regime even in the presence of strong mobile phone transmissions. We discuss the scientific and technical aspects of the new receiver including its astronomical objectives, as well as the feed, receiver, digitiser and signal-processor design. We describe the pipeline routines that for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.00656","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/1911.00656/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":"2026-07-05T00:55:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F04mH9ZiVQn8h7YwR8hc5KGAaJgl/MG8040k6wDmvAXofSnzeQFraqGGFEu8n0lcYMhfaQVmdZGS2/yqbWWvAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:30:10.748226Z"},"content_sha256":"a1c83440c7d189c899514e0c679c308ed7464f7821b92519e411aa0871427253","schema_version":"1.0","event_id":"sha256:a1c83440c7d189c899514e0c679c308ed7464f7821b92519e411aa0871427253"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/bundle.json","state_url":"https://pith.science/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/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":"2026-07-05T14:30:10Z","links":{"resolver":"https://pith.science/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4","bundle":"https://pith.science/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/bundle.json","state":"https://pith.science/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VR3MBC5ALVRVR4XHHQDD4IQGZ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VR3MBC5ALVRVR4XHHQDD4IQGZ4","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":"e28a2d6a2df176fab257bf0f97dba9c932611425605524f5b68300470416bd42","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-02T05:27:42Z","title_canon_sha256":"5ded609d5997c8204e37f7bf5eba32395ccd4430a5fdd43cb8db230e36efdb26"},"schema_version":"1.0","source":{"id":"1911.00656","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.00656","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"arxiv_version","alias_value":"1911.00656v1","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.00656","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_12","alias_value":"VR3MBC5ALVRV","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_16","alias_value":"VR3MBC5ALVRVR4XH","created_at":"2026-07-05T00:55:05Z"},{"alias_kind":"pith_short_8","alias_value":"VR3MBC5A","created_at":"2026-07-05T00:55:05Z"}],"graph_snapshots":[{"event_id":"sha256:a1c83440c7d189c899514e0c679c308ed7464f7821b92519e411aa0871427253","target":"graph","created_at":"2026-07-05T00:55:05Z","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/1911.00656/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We describe an ultra-wide-bandwidth, low-frequency receiver (\"UWL\") recently installed on the Parkes radio telescope. The receiver system provides continuous frequency coverage from 704 to 4032 MHz. For much of the band (~60%) the system temperature is approximately 22K and the receiver system remains in a linear regime even in the presence of strong mobile phone transmissions. We discuss the scientific and technical aspects of the new receiver including its astronomical objectives, as well as the feed, receiver, digitiser and signal-processor design. We describe the pipeline routines that for","authors_text":"A. Ahmed, A. D. Cameron, A. Dunning, A. Jameson, A. K. Tzioumis, B. Dong, B. Preisig, B. T. Indermuehle, C. J. Phillips, D. A. Craig, D. B. Hayman, D. C.-J. Bock, D. C. Price, D. George, E. Carretti, E. M. Sadler, G. Hobbs, H. Kanoniuk, J. A. Green, J. Dempsey, J. E. Reynolds, J. F. Kaczmarek, J. L. Han, J. R. Dawson, J. Sarkissian, J. Tuthill, K. Jeganathan, K. Reeves, K. W. Smart, L. Reilly, L. Staveley-Smith, L. Toomey, L. Wen, M. Bailes, M. Bourne, M. Bowen, M. Brothers, M. Kesteven, M. Kramer, M. Leach, M. Marquarding, M. Smith, M. T. Whiting, N. Carter, N. C. Pope, N. D. R. Bhat, N. Wang, P. Doherty, P. G. Edwards, P. Roberts, P. Roush, R. Beresford, R. Chekkala, R. M. Shannon, R. N. Manchester, S. Castillo, S. Dai, S. Johnston, S. L. Smith. C. Sobey, S. Mader, S. Oslowski, S. Severs, S. W. Amy, T. Ergesh, T. Robishaw, T. Ruckley, V. A. Moss, V. J. McIntyre, W. Cheng, W. van Straten, X. Y. Gao, Y. Chung","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-02T05:27:42Z","title":"An ultra-wide bandwidth (704 to 4032 MHz) receiver for the Parkes radio telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.00656","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":"sha256:99e4abde0863e04256e72edb06d94429f696e300346c658ebd6bf1b87945177a","target":"record","created_at":"2026-07-05T00:55:05Z","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":"e28a2d6a2df176fab257bf0f97dba9c932611425605524f5b68300470416bd42","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-02T05:27:42Z","title_canon_sha256":"5ded609d5997c8204e37f7bf5eba32395ccd4430a5fdd43cb8db230e36efdb26"},"schema_version":"1.0","source":{"id":"1911.00656","kind":"arxiv","version":1}},"canonical_sha256":"ac76c08ba05d6358f2e73c063e2206cf2b3dc62b88ead871657d65fe92073447","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac76c08ba05d6358f2e73c063e2206cf2b3dc62b88ead871657d65fe92073447","first_computed_at":"2026-07-05T00:55:05.432196Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:55:05.432196Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8Qhw3Dr5bZ4cVu9maSINH4nrZ1SRrqgiKjvDIjWN5G2BWCtGeLDyMQ2zHjP3DlUNfLrp3qQuuwqHti8hc5+IAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:55:05.432682Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.00656","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99e4abde0863e04256e72edb06d94429f696e300346c658ebd6bf1b87945177a","sha256:a1c83440c7d189c899514e0c679c308ed7464f7821b92519e411aa0871427253"],"state_sha256":"59a5b088e4c368957acc69a38f83bfbc2171f0ed551768be9972a80b3ad20f31"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AwEkxznLp6Th0wwdXnIbAv66CaQfPHy1cjEULZyrtM7qFjFedMdurfZ/lYdYN5TvAAmLEb9y+jhgLXU6J/8EAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T14:30:10.751646Z","bundle_sha256":"79731e904e85e3008c4cae8187364b89ee6e0e6d5ca1eec66c2b14fc590edb16"}}