{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:ZCLJELELCURD7SUGTIQ5Q7K66L","short_pith_number":"pith:ZCLJELEL","schema_version":"1.0","canonical_sha256":"c896922c8b15223fca869a21d87d5ef2ff9cea8360688ab86304f7894e13502c","source":{"kind":"arxiv","id":"astro-ph/0309662","version":3},"attestation_state":"computed","paper":{"title":"Reconstructing the Primordial Spectrum from WMAP Data by the Cosmic Inversion Method","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jun'ichi Yokoyama, Makoto Matsumiya, Misao Sasaki, Noriyuki Kogo","submitted_at":"2003-09-24T08:56:20Z","abstract_excerpt":"We reconstruct the primordial spectrum of the curvature perturbation, $P(k)$, from the observational data of the Wilkinson Microwave Anisotropy Probe (WMAP) by the cosmic inversion method developed recently. In contrast to conventional parameter-fitting methods, our method can potentially reproduce small features in $P(k)$ with good accuracy. As a result, we obtain a complicated oscillatory $P(k)$. We confirm that this reconstructed $P(k)$ recovers the WMAP angular power spectrum with resolution up to $\\Delta \\ell \\simeq 5$. Similar oscillatory features are found, however, in simulations using"},"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/0309662","kind":"arxiv","version":3},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-09-24T08:56:20Z","cross_cats_sorted":[],"title_canon_sha256":"edb8223c7a2be5af7ac0c4bd1eb90ec5348e18909bf89c332e0923e3ae1d30d4","abstract_canon_sha256":"40b1aeb2bc736b5122875e2295fcf4cc6d10db235655f9866f8c4ad244cc3f62"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:54:06.162144Z","signature_b64":"cp25zMpZ6xT4wW9OIlsKT7pMcHzqNPpOPEPalwc6TkLbC+vXGeT338Ce7pmcu9OzX1VHsdawMGi5ji5BqyFzBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c896922c8b15223fca869a21d87d5ef2ff9cea8360688ab86304f7894e13502c","last_reissued_at":"2026-07-04T15:54:06.161645Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:54:06.161645Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Reconstructing the Primordial Spectrum from WMAP Data by the Cosmic Inversion Method","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jun'ichi Yokoyama, Makoto Matsumiya, Misao Sasaki, Noriyuki Kogo","submitted_at":"2003-09-24T08:56:20Z","abstract_excerpt":"We reconstruct the primordial spectrum of the curvature perturbation, $P(k)$, from the observational data of the Wilkinson Microwave Anisotropy Probe (WMAP) by the cosmic inversion method developed recently. In contrast to conventional parameter-fitting methods, our method can potentially reproduce small features in $P(k)$ with good accuracy. As a result, we obtain a complicated oscillatory $P(k)$. We confirm that this reconstructed $P(k)$ recovers the WMAP angular power spectrum with resolution up to $\\Delta \\ell \\simeq 5$. Similar oscillatory features are found, however, in simulations using"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0309662","kind":"arxiv","version":3},"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/0309662/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0309662","created_at":"2026-07-04T15:54:06.161707+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0309662v3","created_at":"2026-07-04T15:54:06.161707+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0309662","created_at":"2026-07-04T15:54:06.161707+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZCLJELELCURD","created_at":"2026-07-04T15:54:06.161707+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZCLJELELCURD7SUG","created_at":"2026-07-04T15:54:06.161707+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZCLJELEL","created_at":"2026-07-04T15:54:06.161707+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/ZCLJELELCURD7SUGTIQ5Q7K66L","json":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L.json","graph_json":"https://pith.science/api/pith-number/ZCLJELELCURD7SUGTIQ5Q7K66L/graph.json","events_json":"https://pith.science/api/pith-number/ZCLJELELCURD7SUGTIQ5Q7K66L/events.json","paper":"https://pith.science/paper/ZCLJELEL"},"agent_actions":{"view_html":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L","download_json":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L.json","view_paper":"https://pith.science/paper/ZCLJELEL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0309662&json=true","fetch_graph":"https://pith.science/api/pith-number/ZCLJELELCURD7SUGTIQ5Q7K66L/graph.json","fetch_events":"https://pith.science/api/pith-number/ZCLJELELCURD7SUGTIQ5Q7K66L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L/action/storage_attestation","attest_author":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L/action/author_attestation","sign_citation":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L/action/citation_signature","submit_replication":"https://pith.science/pith/ZCLJELELCURD7SUGTIQ5Q7K66L/action/replication_record"}},"created_at":"2026-07-04T15:54:06.161707+00:00","updated_at":"2026-07-04T15:54:06.161707+00:00"}