{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:WETXF7FBMJVDXYKF6XS5GJEVDE","short_pith_number":"pith:WETXF7FB","schema_version":"1.0","canonical_sha256":"b12772fca1626a3be145f5e5d3249519076094f9ce031973a1f4f6b1f1ecc4a1","source":{"kind":"arxiv","id":"1207.1694","version":3},"attestation_state":"computed","paper":{"title":"Model-independent constraints on the cosmic opacity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"J. C. Carvalho, J. S. Alcaniz, R. F. L. Holanda","submitted_at":"2012-07-06T17:45:16Z","abstract_excerpt":"We use current measurements of the expansion rate $H(z)$ and cosmic background radiation bounds on the spatial curvature of the Universe to impose cosmological model-independent constraints on cosmic opacity. To perform our analyses, we compare opacity-free distance modulus from $H(z)$ data with those from two supernovae Ia compilations: the Union2.1 plus the most distant spectroscopically confirmed SNe Ia (SNe Ia SCP-0401 $z=1.713$) and two Sloan Digital Sky Survey (SDSS) subsamples. The influence of different SNe Ia light-curve fitters (SALT2 and MLCS2K2) on the results is also verified. We "},"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":"1207.1694","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-07-06T17:45:16Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"471e8f8abc6bccea1432b2a91efabeb74aacdff8cf1ce8cb40dc46fd96d43e75","abstract_canon_sha256":"af80b139eaf1ed85180b0d9b9a4fcd823b7df8e5cffb316c19131112eb2bf3da"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:33.606605Z","signature_b64":"QPTll0z1bzrs3e3q6b32rNV2y52FWsrauQDkpbsCpD/dXnNjYBcJ/RqVep979nfRRtP7g6bRAGlVcjAhh7LTBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b12772fca1626a3be145f5e5d3249519076094f9ce031973a1f4f6b1f1ecc4a1","last_reissued_at":"2026-05-18T01:56:33.605960Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:33.605960Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Model-independent constraints on the cosmic opacity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"J. C. Carvalho, J. S. Alcaniz, R. F. L. Holanda","submitted_at":"2012-07-06T17:45:16Z","abstract_excerpt":"We use current measurements of the expansion rate $H(z)$ and cosmic background radiation bounds on the spatial curvature of the Universe to impose cosmological model-independent constraints on cosmic opacity. To perform our analyses, we compare opacity-free distance modulus from $H(z)$ data with those from two supernovae Ia compilations: the Union2.1 plus the most distant spectroscopically confirmed SNe Ia (SNe Ia SCP-0401 $z=1.713$) and two Sloan Digital Sky Survey (SDSS) subsamples. The influence of different SNe Ia light-curve fitters (SALT2 and MLCS2K2) on the results is also verified. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.1694","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":""},"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":"1207.1694","created_at":"2026-05-18T01:56:33.606064+00:00"},{"alias_kind":"arxiv_version","alias_value":"1207.1694v3","created_at":"2026-05-18T01:56:33.606064+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.1694","created_at":"2026-05-18T01:56:33.606064+00:00"},{"alias_kind":"pith_short_12","alias_value":"WETXF7FBMJVD","created_at":"2026-05-18T12:27:25.539911+00:00"},{"alias_kind":"pith_short_16","alias_value":"WETXF7FBMJVDXYKF","created_at":"2026-05-18T12:27:25.539911+00:00"},{"alias_kind":"pith_short_8","alias_value":"WETXF7FB","created_at":"2026-05-18T12:27:25.539911+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/WETXF7FBMJVDXYKF6XS5GJEVDE","json":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE.json","graph_json":"https://pith.science/api/pith-number/WETXF7FBMJVDXYKF6XS5GJEVDE/graph.json","events_json":"https://pith.science/api/pith-number/WETXF7FBMJVDXYKF6XS5GJEVDE/events.json","paper":"https://pith.science/paper/WETXF7FB"},"agent_actions":{"view_html":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE","download_json":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE.json","view_paper":"https://pith.science/paper/WETXF7FB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1207.1694&json=true","fetch_graph":"https://pith.science/api/pith-number/WETXF7FBMJVDXYKF6XS5GJEVDE/graph.json","fetch_events":"https://pith.science/api/pith-number/WETXF7FBMJVDXYKF6XS5GJEVDE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE/action/storage_attestation","attest_author":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE/action/author_attestation","sign_citation":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE/action/citation_signature","submit_replication":"https://pith.science/pith/WETXF7FBMJVDXYKF6XS5GJEVDE/action/replication_record"}},"created_at":"2026-05-18T01:56:33.606064+00:00","updated_at":"2026-05-18T01:56:33.606064+00:00"}