{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:UEIXZLNOUAQHUDHRMFUSDEO77A","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":"28eb5c249bd9f0e02e4ce912546992364e8716e42becc33e4759bfc00e2d8703","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-18T19:00:08Z","title_canon_sha256":"96b94b58a54183a4e926296ae4e070de533dc281562738f0d7efab72630cb6d1"},"schema_version":"1.0","source":{"id":"2101.07277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.07277","created_at":"2026-07-05T03:19:04Z"},{"alias_kind":"arxiv_version","alias_value":"2101.07277v1","created_at":"2026-07-05T03:19:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.07277","created_at":"2026-07-05T03:19:04Z"},{"alias_kind":"pith_short_12","alias_value":"UEIXZLNOUAQH","created_at":"2026-07-05T03:19:04Z"},{"alias_kind":"pith_short_16","alias_value":"UEIXZLNOUAQHUDHR","created_at":"2026-07-05T03:19:04Z"},{"alias_kind":"pith_short_8","alias_value":"UEIXZLNO","created_at":"2026-07-05T03:19:04Z"}],"graph_snapshots":[{"event_id":"sha256:994dc0418cb8bc0da402a9fa520aca1479e472cd713d65cc6ccdb91b05409fe3","target":"graph","created_at":"2026-07-05T03:19:04Z","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/2101.07277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a new method for using the observed starlight polarization and polarized submm emission to constrain the shapes and porosities of interstellar grains. We present the modified picket fence approximation (MPFA), and verify that it is sufficiently accurate for modeling starlight polarization. We introduce the starlight polarization integral $\\Pi_{\\rm obs}$ as a measure of overall strength of the observed polarization of starlight, and the starlight polarization efficiency integral $\\Phi$ to characterize the effectiveness of different grain types for producing polarization of starlight.","authors_text":"Brandon S. Hensley, B. T. Draine","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-18T19:00:08Z","title":"Using the Starlight Polarization Efficiency Integral to Constrain Shapes and Porosities of Interstellar Grains"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.07277","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":"sha256:757b6665739b2956eaf2f546dd9b6b22134399c1e873628405f9a7e4097a26c8","target":"record","created_at":"2026-07-05T03:19:04Z","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":"28eb5c249bd9f0e02e4ce912546992364e8716e42becc33e4759bfc00e2d8703","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-01-18T19:00:08Z","title_canon_sha256":"96b94b58a54183a4e926296ae4e070de533dc281562738f0d7efab72630cb6d1"},"schema_version":"1.0","source":{"id":"2101.07277","kind":"arxiv","version":1}},"canonical_sha256":"a1117cadaea0207a0cf161692191dff83b5eb529e5fdb49d933f6bdeb33864d7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1117cadaea0207a0cf161692191dff83b5eb529e5fdb49d933f6bdeb33864d7","first_computed_at":"2026-07-05T03:19:04.430506Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:19:04.430506Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+xfHJjCQ0vSusFS96nlTI6QqK1IjtbMbTbY4kvwSGGGEO98mWNBoKS3Nyh1oITl0q9qqWV2XLuhN0W+eYtVZBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:19:04.431101Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.07277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:757b6665739b2956eaf2f546dd9b6b22134399c1e873628405f9a7e4097a26c8","sha256:994dc0418cb8bc0da402a9fa520aca1479e472cd713d65cc6ccdb91b05409fe3"],"state_sha256":"9e5e3fda10b00de996d30c2992157396006089ed233454b92a67fb2e4a9bc9b6"}