{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2004:AL4Z55BTPFYYQOUBXXSVVCDDFO","short_pith_number":"pith:AL4Z55BT","schema_version":"1.0","canonical_sha256":"02f99ef4337971883a81bde55a88632ba90038403ec6d77dc8c72ebe8fc698da","source":{"kind":"arxiv","id":"astro-ph/0412046","version":1},"attestation_state":"computed","paper":{"title":"Adaptive Filters Revisited - RFI Mitigation in pulsar observations","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. Dawson, G. Hobbs, M. Kesteven, R. Clement, R. Manchester, T. Uppal","submitted_at":"2004-12-02T04:50:44Z","abstract_excerpt":"Pulsar detection and timing experiments are applications where adaptive filters seem eminently suitable tools for radio-frequency-interference (RFI) mitigation. We describe a novel variant which works well in field trials of pulsar observations centred on an observing frequency of 675 MHz, a bandwidth of 64 MHz and with 2-bit sampling. Adaptive filters have generally received bad press for RFI mitigation in radio astronomical observations with their most serious drawback being a spectral echo of the RFI embedded in the filtered signals. Pulsar observations are intrinsically less sensitive to t"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/0412046","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-12-02T04:50:44Z","cross_cats_sorted":[],"title_canon_sha256":"52edf3ef58a71f570706b85288259de193f0187222328bba80cdce6b4bc2b12b","abstract_canon_sha256":"f6448bbd54a2d2a709b444fcc22f672451f7ced0a2dcfd62afa3d7ade08ce9a8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:34.766121Z","signature_b64":"O+H5E+bVGsL+elKDuWmuf4yMbs8HVe13FHaYp5fvCPRCOba8YbX8gnWjPxjvXS5L1+YD1CEi7DzNf8NIbZKuBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02f99ef4337971883a81bde55a88632ba90038403ec6d77dc8c72ebe8fc698da","last_reissued_at":"2026-05-18T01:40:34.765491Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:34.765491Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Adaptive Filters Revisited - RFI Mitigation in pulsar observations","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"B. Dawson, G. Hobbs, M. Kesteven, R. Clement, R. Manchester, T. Uppal","submitted_at":"2004-12-02T04:50:44Z","abstract_excerpt":"Pulsar detection and timing experiments are applications where adaptive filters seem eminently suitable tools for radio-frequency-interference (RFI) mitigation. We describe a novel variant which works well in field trials of pulsar observations centred on an observing frequency of 675 MHz, a bandwidth of 64 MHz and with 2-bit sampling. Adaptive filters have generally received bad press for RFI mitigation in radio astronomical observations with their most serious drawback being a spectral echo of the RFI embedded in the filtered signals. Pulsar observations are intrinsically less sensitive to t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0412046","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0412046","created_at":"2026-05-18T01:40:34.765591+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0412046v1","created_at":"2026-05-18T01:40:34.765591+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0412046","created_at":"2026-05-18T01:40:34.765591+00:00"},{"alias_kind":"pith_short_12","alias_value":"AL4Z55BTPFYY","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"AL4Z55BTPFYYQOUB","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"AL4Z55BT","created_at":"2026-05-18T12:25:52.051335+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO","json":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO.json","graph_json":"https://pith.science/api/pith-number/AL4Z55BTPFYYQOUBXXSVVCDDFO/graph.json","events_json":"https://pith.science/api/pith-number/AL4Z55BTPFYYQOUBXXSVVCDDFO/events.json","paper":"https://pith.science/paper/AL4Z55BT"},"agent_actions":{"view_html":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO","download_json":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO.json","view_paper":"https://pith.science/paper/AL4Z55BT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0412046&json=true","fetch_graph":"https://pith.science/api/pith-number/AL4Z55BTPFYYQOUBXXSVVCDDFO/graph.json","fetch_events":"https://pith.science/api/pith-number/AL4Z55BTPFYYQOUBXXSVVCDDFO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO/action/storage_attestation","attest_author":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO/action/author_attestation","sign_citation":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO/action/citation_signature","submit_replication":"https://pith.science/pith/AL4Z55BTPFYYQOUBXXSVVCDDFO/action/replication_record"}},"created_at":"2026-05-18T01:40:34.765591+00:00","updated_at":"2026-05-18T01:40:34.765591+00:00"}