{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:37XVD5AWSOYZCKSZ4B7J6KTWAH","short_pith_number":"pith:37XVD5AW","schema_version":"1.0","canonical_sha256":"dfef51f41693b1912a59e07e9f2a7601c8ec9cf1dc841d92c7e448ee94d2aa5a","source":{"kind":"arxiv","id":"1701.05822","version":1},"attestation_state":"computed","paper":{"title":"Laboratory Observations and Simulations of Phase Reddening","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Pommerol, H.U. Keller, N. Thomas, S.E. Schr\\\"oder, T.L. Roush, Y. Grynko","submitted_at":"2017-01-20T15:18:11Z","abstract_excerpt":"The visible reflectance spectrum of many solar system bodies changes with changing viewing geometry for reasons not fully understood. It is often observed to redden (increasing spectral slope) with increasing solar phase angle, an effect known as phase reddening. Only once, in an observation of the Martian surface by the Viking 1 lander, was reddening observed up to a certain phase angle with bluing beyond, making the reflectance ratio as a function of phase angle shaped like an arch. However, in laboratory experiments this arch-shape is frequently encountered. To investigate this, we measured"},"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":"1701.05822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-01-20T15:18:11Z","cross_cats_sorted":[],"title_canon_sha256":"32a1c0a43ad21342bf9504dc89ea563aa4cc20395002c9f785fca1704a9983b2","abstract_canon_sha256":"ff6207c7a5fe74f0d854937bd4eeafe56c10aedee2d2bd2fb26472458ef06562"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:24.621059Z","signature_b64":"p+cKjCFgT+TUnqhvGywKLaxfRWLJmUfYtctt3WU29FxNiX4cdefli6f6sUE+Ru3HIMBETruSqhaZawAYK/DpAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dfef51f41693b1912a59e07e9f2a7601c8ec9cf1dc841d92c7e448ee94d2aa5a","last_reissued_at":"2026-05-18T00:52:24.620487Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:24.620487Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Laboratory Observations and Simulations of Phase Reddening","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Pommerol, H.U. Keller, N. Thomas, S.E. Schr\\\"oder, T.L. Roush, Y. Grynko","submitted_at":"2017-01-20T15:18:11Z","abstract_excerpt":"The visible reflectance spectrum of many solar system bodies changes with changing viewing geometry for reasons not fully understood. It is often observed to redden (increasing spectral slope) with increasing solar phase angle, an effect known as phase reddening. Only once, in an observation of the Martian surface by the Viking 1 lander, was reddening observed up to a certain phase angle with bluing beyond, making the reflectance ratio as a function of phase angle shaped like an arch. However, in laboratory experiments this arch-shape is frequently encountered. To investigate this, we measured"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.05822","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":"1701.05822","created_at":"2026-05-18T00:52:24.620574+00:00"},{"alias_kind":"arxiv_version","alias_value":"1701.05822v1","created_at":"2026-05-18T00:52:24.620574+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.05822","created_at":"2026-05-18T00:52:24.620574+00:00"},{"alias_kind":"pith_short_12","alias_value":"37XVD5AWSOYZ","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_16","alias_value":"37XVD5AWSOYZCKSZ","created_at":"2026-05-18T12:30:58.224056+00:00"},{"alias_kind":"pith_short_8","alias_value":"37XVD5AW","created_at":"2026-05-18T12:30:58.224056+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/37XVD5AWSOYZCKSZ4B7J6KTWAH","json":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH.json","graph_json":"https://pith.science/api/pith-number/37XVD5AWSOYZCKSZ4B7J6KTWAH/graph.json","events_json":"https://pith.science/api/pith-number/37XVD5AWSOYZCKSZ4B7J6KTWAH/events.json","paper":"https://pith.science/paper/37XVD5AW"},"agent_actions":{"view_html":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH","download_json":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH.json","view_paper":"https://pith.science/paper/37XVD5AW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1701.05822&json=true","fetch_graph":"https://pith.science/api/pith-number/37XVD5AWSOYZCKSZ4B7J6KTWAH/graph.json","fetch_events":"https://pith.science/api/pith-number/37XVD5AWSOYZCKSZ4B7J6KTWAH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH/action/storage_attestation","attest_author":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH/action/author_attestation","sign_citation":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH/action/citation_signature","submit_replication":"https://pith.science/pith/37XVD5AWSOYZCKSZ4B7J6KTWAH/action/replication_record"}},"created_at":"2026-05-18T00:52:24.620574+00:00","updated_at":"2026-05-18T00:52:24.620574+00:00"}