{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:7Q3H2YWDUDCF75ZFDZPY2WQ457","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"33228b7a2539c0218fa69e657205b2696f0630ecdbdc3c4e982f222a19cedb41","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-20T17:15:17Z","title_canon_sha256":"e0a777b50f01b585da0f22f25f2b7e2777107b64c700fbafb1b0fac544e60a72"},"schema_version":"1.0","source":{"id":"2302.10111","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10111","created_at":"2026-07-05T05:43:33Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10111v1","created_at":"2026-07-05T05:43:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10111","created_at":"2026-07-05T05:43:33Z"},{"alias_kind":"pith_short_12","alias_value":"7Q3H2YWDUDCF","created_at":"2026-07-05T05:43:33Z"},{"alias_kind":"pith_short_16","alias_value":"7Q3H2YWDUDCF75ZF","created_at":"2026-07-05T05:43:33Z"},{"alias_kind":"pith_short_8","alias_value":"7Q3H2YWD","created_at":"2026-07-05T05:43:33Z"}],"graph_snapshots":[{"event_id":"sha256:611660e1bdc73f3abd2ca0010c43cae3c476e4fd0559ee0ae682a8caba478663","target":"graph","created_at":"2026-07-05T05:43:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2302.10111/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"There are various indications that the most primitive small bodies (P, D-type asteroids, comets) have surfaces made of intimate mixtures of opaque minerals and other components (silicates, carbonaceous compounds, etc.) in the form of sub-micrometre-sized grains, smaller than the wavelength at which they are observed, so-called hyperfine grains. Here, we investigate how the Vis-NIR-MIR spectral and V-band polarimetric properties of surfaces made of hyperfine grains are influenced by the relative abundance of such hyperfine materials, having strongly different optical indexes. Mixtures of grains","authors_text":"Alessandro Maturilli, Antoine Pommerol, Bernard Schmitt, Eric Quirico, Giulia Alemanno, J\\\"orn Helbert, Lucas Patty, Olivier Poch, Pierre Beck, Robin Sultana, Stefano Spadaccia","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-20T17:15:17Z","title":"Reflection, emission, and polarization properties of surfaces made of hyperfine grains, and implications for the nature of primitive small bodies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10111","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:70be466c23d49e2ef8f8e8aae674e2ea17745366fca5818d92c8267bda44bbd9","target":"record","created_at":"2026-07-05T05:43:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"33228b7a2539c0218fa69e657205b2696f0630ecdbdc3c4e982f222a19cedb41","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2023-02-20T17:15:17Z","title_canon_sha256":"e0a777b50f01b585da0f22f25f2b7e2777107b64c700fbafb1b0fac544e60a72"},"schema_version":"1.0","source":{"id":"2302.10111","kind":"arxiv","version":1}},"canonical_sha256":"fc367d62c3a0c45ff7251e5f8d5a1cefd1c7882c7ef32c9281588807f5b700e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc367d62c3a0c45ff7251e5f8d5a1cefd1c7882c7ef32c9281588807f5b700e0","first_computed_at":"2026-07-05T05:43:33.378073Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:43:33.378073Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q18Cefnb1ezG8NQnxWLBLquMGKAlEbovO8of1R8OJuPs/koLhRPspqKHvCJ911lP6bnY+aVu3S0E3pGjrrcjAw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:43:33.378606Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.10111","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:70be466c23d49e2ef8f8e8aae674e2ea17745366fca5818d92c8267bda44bbd9","sha256:611660e1bdc73f3abd2ca0010c43cae3c476e4fd0559ee0ae682a8caba478663"],"state_sha256":"55ab57d4bc35d5a4694238ea797e1fbea407679d5ca02fb39a5531dff2c386a8"}