{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:3AQSP7DH4QTETEJP6W3IKFV33E","short_pith_number":"pith:3AQSP7DH","canonical_record":{"source":{"id":"2004.13502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-28T13:35:18Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"50d1381badb6150d37a56cea3084c504c8ebf6295cef8eda8aace5a4620fec00","abstract_canon_sha256":"a4e0d9d0b7f88fed499f7f09a54ae3044629c769ba253e31bddc13a02bf67009"},"schema_version":"1.0"},"canonical_sha256":"d82127fc67e42649912ff5b68516bbd928393cd6f83ba4afdf3dcc1af8d39644","source":{"kind":"arxiv","id":"2004.13502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.13502","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"arxiv_version","alias_value":"2004.13502v1","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.13502","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_12","alias_value":"3AQSP7DH4QTE","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_16","alias_value":"3AQSP7DH4QTETEJP","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_8","alias_value":"3AQSP7DH","created_at":"2026-07-05T01:20:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:3AQSP7DH4QTETEJP6W3IKFV33E","target":"record","payload":{"canonical_record":{"source":{"id":"2004.13502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-28T13:35:18Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"50d1381badb6150d37a56cea3084c504c8ebf6295cef8eda8aace5a4620fec00","abstract_canon_sha256":"a4e0d9d0b7f88fed499f7f09a54ae3044629c769ba253e31bddc13a02bf67009"},"schema_version":"1.0"},"canonical_sha256":"d82127fc67e42649912ff5b68516bbd928393cd6f83ba4afdf3dcc1af8d39644","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:20:59.796810Z","signature_b64":"6wc4r9oQKMtnEmZWc+10MG/D1n9M5/Iy5NNwZbUEyZ4Gqp5foDDcOVg6ykCqQtk8Pe/ayxC0R2vF30oAKxr3Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d82127fc67e42649912ff5b68516bbd928393cd6f83ba4afdf3dcc1af8d39644","last_reissued_at":"2026-07-05T01:20:59.796296Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:20:59.796296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.13502","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:20:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qB2YI1InNO+al7F9aEjyTrC+uEFi6Qqu/XYkDWtS25ZnX1pVP9dHB/kw+9wiHVcnXwCsLfzyrwA7aZkS//cVDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T16:41:10.101401Z"},"content_sha256":"f691f769a22f0a51d68be5e1efb56c6411a343c6acc4078e3bde98ffc6a6601c","schema_version":"1.0","event_id":"sha256:f691f769a22f0a51d68be5e1efb56c6411a343c6acc4078e3bde98ffc6a6601c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:3AQSP7DH4QTETEJP6W3IKFV33E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mineral snowflakes on exoplanets and brown dwarfs: Effects of micro-porosity, size distributions, and particle shape","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Christiane Helling, Dominic Samra, Michiel Min","submitted_at":"2020-04-28T13:35:18Z","abstract_excerpt":"Exoplanet atmosphere characterisation has become an important tool in understanding exoplanet formation, evolution. However, clouds remain a key challenge for characterisation: upcoming space telescopes (e.g. JWST, ARIEL) and ground-based high-resolution spectrographs (e.g. CRIRES+) will produce data requiring detailed understanding of cloud formation and cloud effects. We aim to understand how the micro-porosity of cloud particles affects the cloud structure, particle size, and material composition. We examine the spectroscopic effects of micro-porous particles, the particle size distribution"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.13502","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.13502/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:20:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u8kfL+TcozTnl3w1uToOZVCEpweHq4eIbR/Oz5aLDbke2UdAD1xblljxlkX5d+B3O/5D7FFe0mUnoU2POMIZBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T16:41:10.101902Z"},"content_sha256":"e7d52ffa4f91bcea9f437b79a713ddbefdcbcad851b4ef4be6e37fd5469ae7bd","schema_version":"1.0","event_id":"sha256:e7d52ffa4f91bcea9f437b79a713ddbefdcbcad851b4ef4be6e37fd5469ae7bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3AQSP7DH4QTETEJP6W3IKFV33E/bundle.json","state_url":"https://pith.science/pith/3AQSP7DH4QTETEJP6W3IKFV33E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3AQSP7DH4QTETEJP6W3IKFV33E/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T16:41:10Z","links":{"resolver":"https://pith.science/pith/3AQSP7DH4QTETEJP6W3IKFV33E","bundle":"https://pith.science/pith/3AQSP7DH4QTETEJP6W3IKFV33E/bundle.json","state":"https://pith.science/pith/3AQSP7DH4QTETEJP6W3IKFV33E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3AQSP7DH4QTETEJP6W3IKFV33E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3AQSP7DH4QTETEJP6W3IKFV33E","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":"a4e0d9d0b7f88fed499f7f09a54ae3044629c769ba253e31bddc13a02bf67009","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-28T13:35:18Z","title_canon_sha256":"50d1381badb6150d37a56cea3084c504c8ebf6295cef8eda8aace5a4620fec00"},"schema_version":"1.0","source":{"id":"2004.13502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.13502","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"arxiv_version","alias_value":"2004.13502v1","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.13502","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_12","alias_value":"3AQSP7DH4QTE","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_16","alias_value":"3AQSP7DH4QTETEJP","created_at":"2026-07-05T01:20:59Z"},{"alias_kind":"pith_short_8","alias_value":"3AQSP7DH","created_at":"2026-07-05T01:20:59Z"}],"graph_snapshots":[{"event_id":"sha256:e7d52ffa4f91bcea9f437b79a713ddbefdcbcad851b4ef4be6e37fd5469ae7bd","target":"graph","created_at":"2026-07-05T01:20:59Z","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/2004.13502/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Exoplanet atmosphere characterisation has become an important tool in understanding exoplanet formation, evolution. However, clouds remain a key challenge for characterisation: upcoming space telescopes (e.g. JWST, ARIEL) and ground-based high-resolution spectrographs (e.g. CRIRES+) will produce data requiring detailed understanding of cloud formation and cloud effects. We aim to understand how the micro-porosity of cloud particles affects the cloud structure, particle size, and material composition. We examine the spectroscopic effects of micro-porous particles, the particle size distribution","authors_text":"Christiane Helling, Dominic Samra, Michiel Min","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-28T13:35:18Z","title":"Mineral snowflakes on exoplanets and brown dwarfs: Effects of micro-porosity, size distributions, and particle shape"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.13502","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:f691f769a22f0a51d68be5e1efb56c6411a343c6acc4078e3bde98ffc6a6601c","target":"record","created_at":"2026-07-05T01:20:59Z","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":"a4e0d9d0b7f88fed499f7f09a54ae3044629c769ba253e31bddc13a02bf67009","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-04-28T13:35:18Z","title_canon_sha256":"50d1381badb6150d37a56cea3084c504c8ebf6295cef8eda8aace5a4620fec00"},"schema_version":"1.0","source":{"id":"2004.13502","kind":"arxiv","version":1}},"canonical_sha256":"d82127fc67e42649912ff5b68516bbd928393cd6f83ba4afdf3dcc1af8d39644","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d82127fc67e42649912ff5b68516bbd928393cd6f83ba4afdf3dcc1af8d39644","first_computed_at":"2026-07-05T01:20:59.796296Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:20:59.796296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6wc4r9oQKMtnEmZWc+10MG/D1n9M5/Iy5NNwZbUEyZ4Gqp5foDDcOVg6ykCqQtk8Pe/ayxC0R2vF30oAKxr3Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:20:59.796810Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.13502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f691f769a22f0a51d68be5e1efb56c6411a343c6acc4078e3bde98ffc6a6601c","sha256:e7d52ffa4f91bcea9f437b79a713ddbefdcbcad851b4ef4be6e37fd5469ae7bd"],"state_sha256":"559b49cac7e4bef289e3d721d076cb51216fa31e0dadec10137fcf5a3313efc1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aysSpDmQ+vmgwnFo883+UD1PjJVEXgK2b64xqjzqD0ImJdRzsrbbwqtehCHJ+SM2fVzEPoTF700IF2KE0aZpAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T16:41:10.105271Z","bundle_sha256":"dd13484842d5c1eb6520d7d59ce198859d57bc0f04952c6a5a6d14f448743576"}}