{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:3AA4HWCBWAFVM2RQQW7OFH4PBE","short_pith_number":"pith:3AA4HWCB","schema_version":"1.0","canonical_sha256":"d801c3d841b00b566a3085bee29f8f090fcd5f9db6a96b6c3db69e1de22e9d03","source":{"kind":"arxiv","id":"1707.01175","version":1},"attestation_state":"computed","paper":{"title":"Insensitivity of The Distance Ladder Hubble Constant Determination to Cepheid Calibration Modeling Choices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Brent Follin, Lloyd Knox","submitted_at":"2017-07-04T23:11:47Z","abstract_excerpt":"Recent determination of the Hubble constant via Cepheid-calibrated supernovae by \\citet{riess_2.4_2016} (R16) find $\\sim 3\\sigma$ tension with inferences based on cosmic microwave background temperature and polarization measurements from $Planck$. This tension could be an indication of inadequacies in the concordance $\\Lambda$CDM model. Here we investigate the possibility that the discrepancy could instead be due to systematic bias or uncertainty in the Cepheid calibration step of the distance ladder measurement by R16. We consider variations in total-to-selective extinction of Cepheid flux as"},"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":"1707.01175","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-04T23:11:47Z","cross_cats_sorted":[],"title_canon_sha256":"465aced8bed4605b81fc917a19d2882200ef44ee83c4977a37ac0978b49caf2d","abstract_canon_sha256":"bbf6d7f3f37765d25ce6a1627a5fbec06fe1a4ad403c370e3e42d0e6a26c291d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:29.875549Z","signature_b64":"2tW2vGgQRQbjMDUlfKaE86qz00QKIiGBQvdWwwquRy9RRMC/ob7uU8XPH9DT2BCt9ogC9rH8Zo7smipWcDYLDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d801c3d841b00b566a3085bee29f8f090fcd5f9db6a96b6c3db69e1de22e9d03","last_reissued_at":"2026-05-18T00:19:29.874974Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:29.874974Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Insensitivity of The Distance Ladder Hubble Constant Determination to Cepheid Calibration Modeling Choices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Brent Follin, Lloyd Knox","submitted_at":"2017-07-04T23:11:47Z","abstract_excerpt":"Recent determination of the Hubble constant via Cepheid-calibrated supernovae by \\citet{riess_2.4_2016} (R16) find $\\sim 3\\sigma$ tension with inferences based on cosmic microwave background temperature and polarization measurements from $Planck$. This tension could be an indication of inadequacies in the concordance $\\Lambda$CDM model. Here we investigate the possibility that the discrepancy could instead be due to systematic bias or uncertainty in the Cepheid calibration step of the distance ladder measurement by R16. We consider variations in total-to-selective extinction of Cepheid flux as"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.01175","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":"1707.01175","created_at":"2026-05-18T00:19:29.875037+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.01175v1","created_at":"2026-05-18T00:19:29.875037+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.01175","created_at":"2026-05-18T00:19:29.875037+00:00"},{"alias_kind":"pith_short_12","alias_value":"3AA4HWCBWAFV","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_16","alias_value":"3AA4HWCBWAFVM2RQ","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_8","alias_value":"3AA4HWCB","created_at":"2026-05-18T12:30:58.224056+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2112.04510","citing_title":"A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team","ref_index":54,"is_internal_anchor":true},{"citing_arxiv_id":"1807.06209","citing_title":"Planck 2018 results. VI. Cosmological parameters","ref_index":135,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE","json":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE.json","graph_json":"https://pith.science/api/pith-number/3AA4HWCBWAFVM2RQQW7OFH4PBE/graph.json","events_json":"https://pith.science/api/pith-number/3AA4HWCBWAFVM2RQQW7OFH4PBE/events.json","paper":"https://pith.science/paper/3AA4HWCB"},"agent_actions":{"view_html":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE","download_json":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE.json","view_paper":"https://pith.science/paper/3AA4HWCB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.01175&json=true","fetch_graph":"https://pith.science/api/pith-number/3AA4HWCBWAFVM2RQQW7OFH4PBE/graph.json","fetch_events":"https://pith.science/api/pith-number/3AA4HWCBWAFVM2RQQW7OFH4PBE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE/action/storage_attestation","attest_author":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE/action/author_attestation","sign_citation":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE/action/citation_signature","submit_replication":"https://pith.science/pith/3AA4HWCBWAFVM2RQQW7OFH4PBE/action/replication_record"}},"created_at":"2026-05-18T00:19:29.875037+00:00","updated_at":"2026-05-18T00:19:29.875037+00:00"}