{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:QR5ZYTXS2ZD7VIJBGBZGQII4BR","short_pith_number":"pith:QR5ZYTXS","canonical_record":{"source":{"id":"2008.10951","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-25T12:09:27Z","cross_cats_sorted":[],"title_canon_sha256":"f6d591fd5fe20f3e98ffd735caecdfe5e17afb3dd7c8dca119e832b8132af208","abstract_canon_sha256":"35131ac2ce15b0db6e8ae4c966064564bacdbb8742f6d77bc6aa1909a6d363a9"},"schema_version":"1.0"},"canonical_sha256":"847b9c4ef2d647faa121307268211c0c67aa7173833253d5190836382d6971a0","source":{"kind":"arxiv","id":"2008.10951","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.10951","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"arxiv_version","alias_value":"2008.10951v1","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.10951","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_12","alias_value":"QR5ZYTXS2ZD7","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_16","alias_value":"QR5ZYTXS2ZD7VIJB","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_8","alias_value":"QR5ZYTXS","created_at":"2026-07-05T01:30:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:QR5ZYTXS2ZD7VIJBGBZGQII4BR","target":"record","payload":{"canonical_record":{"source":{"id":"2008.10951","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-25T12:09:27Z","cross_cats_sorted":[],"title_canon_sha256":"f6d591fd5fe20f3e98ffd735caecdfe5e17afb3dd7c8dca119e832b8132af208","abstract_canon_sha256":"35131ac2ce15b0db6e8ae4c966064564bacdbb8742f6d77bc6aa1909a6d363a9"},"schema_version":"1.0"},"canonical_sha256":"847b9c4ef2d647faa121307268211c0c67aa7173833253d5190836382d6971a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:30:11.840858Z","signature_b64":"15jsb6EUKQ4RWxBHVcZdF8S7iHiU61o2zZq2hA/baw60ws3V+FTVVZy/ezicjwyI211L5aomndtOM0IgVCGoCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"847b9c4ef2d647faa121307268211c0c67aa7173833253d5190836382d6971a0","last_reissued_at":"2026-07-05T01:30:11.840408Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:30:11.840408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.10951","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":"2026-07-05T01:30:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7cF5BquaL4RmyPGu08DO61yeDOol0jTsFPjf9/aM/gx5AV5dhwskR2InULv759+nsyAQdlsXZQtEEAeIyZ0sAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T12:11:34.257965Z"},"content_sha256":"1053c126c459179c3ea73829ef350f297f4ae9f1ce7d686604ec5aafc7c4fbf6","schema_version":"1.0","event_id":"sha256:1053c126c459179c3ea73829ef350f297f4ae9f1ce7d686604ec5aafc7c4fbf6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:QR5ZYTXS2ZD7VIJBGBZGQII4BR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dust/ice mixing in cold regions and solid-state water in the diffuse interstellar medium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexey Potapov, Cornelia J\\\"ager, Jeroen Bouwman, Thomas Henning","submitted_at":"2020-08-25T12:09:27Z","abstract_excerpt":"Whether ice in cold cosmic environments is physically separated from the silicate dust or mixed with individual silicate moieties is not known. However, different grain models give very different compositions and temperatures of grains. The aim of the present study is a comparison of the mid-IR spectra of laboratory silicate-grains/water-ice mixtures with astronomical observations to evaluate the presence of dust/ice mixtures in interstellar and circumstellar environments. The laboratory data can explain the observations assuming reasonable mass-averaged temperatures for the protostellar envel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.10951","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/2008.10951/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":"2026-07-05T01:30:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iOZqy+BmTwPbBYk9uthVjjub0Lvz7qGHXLQuoqIhNT9TzHd0UaWnWmnQDNtbh20esZ4BXTiv9glrrPSbLqexCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T12:11:34.259654Z"},"content_sha256":"7bf48df5a1c71e4af6fa20690fc51e2616957b49afac1a2b4980df13dc58331b","schema_version":"1.0","event_id":"sha256:7bf48df5a1c71e4af6fa20690fc51e2616957b49afac1a2b4980df13dc58331b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/bundle.json","state_url":"https://pith.science/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/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":"2026-08-10T12:11:34Z","links":{"resolver":"https://pith.science/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR","bundle":"https://pith.science/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/bundle.json","state":"https://pith.science/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QR5ZYTXS2ZD7VIJBGBZGQII4BR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QR5ZYTXS2ZD7VIJBGBZGQII4BR","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":"35131ac2ce15b0db6e8ae4c966064564bacdbb8742f6d77bc6aa1909a6d363a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-25T12:09:27Z","title_canon_sha256":"f6d591fd5fe20f3e98ffd735caecdfe5e17afb3dd7c8dca119e832b8132af208"},"schema_version":"1.0","source":{"id":"2008.10951","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.10951","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"arxiv_version","alias_value":"2008.10951v1","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.10951","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_12","alias_value":"QR5ZYTXS2ZD7","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_16","alias_value":"QR5ZYTXS2ZD7VIJB","created_at":"2026-07-05T01:30:11Z"},{"alias_kind":"pith_short_8","alias_value":"QR5ZYTXS","created_at":"2026-07-05T01:30:11Z"}],"graph_snapshots":[{"event_id":"sha256:7bf48df5a1c71e4af6fa20690fc51e2616957b49afac1a2b4980df13dc58331b","target":"graph","created_at":"2026-07-05T01:30:11Z","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/2008.10951/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Whether ice in cold cosmic environments is physically separated from the silicate dust or mixed with individual silicate moieties is not known. However, different grain models give very different compositions and temperatures of grains. The aim of the present study is a comparison of the mid-IR spectra of laboratory silicate-grains/water-ice mixtures with astronomical observations to evaluate the presence of dust/ice mixtures in interstellar and circumstellar environments. The laboratory data can explain the observations assuming reasonable mass-averaged temperatures for the protostellar envel","authors_text":"Alexey Potapov, Cornelia J\\\"ager, Jeroen Bouwman, Thomas Henning","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-25T12:09:27Z","title":"Dust/ice mixing in cold regions and solid-state water in the diffuse interstellar medium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.10951","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":"sha256:1053c126c459179c3ea73829ef350f297f4ae9f1ce7d686604ec5aafc7c4fbf6","target":"record","created_at":"2026-07-05T01:30:11Z","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":"35131ac2ce15b0db6e8ae4c966064564bacdbb8742f6d77bc6aa1909a6d363a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-08-25T12:09:27Z","title_canon_sha256":"f6d591fd5fe20f3e98ffd735caecdfe5e17afb3dd7c8dca119e832b8132af208"},"schema_version":"1.0","source":{"id":"2008.10951","kind":"arxiv","version":1}},"canonical_sha256":"847b9c4ef2d647faa121307268211c0c67aa7173833253d5190836382d6971a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"847b9c4ef2d647faa121307268211c0c67aa7173833253d5190836382d6971a0","first_computed_at":"2026-07-05T01:30:11.840408Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:30:11.840408Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"15jsb6EUKQ4RWxBHVcZdF8S7iHiU61o2zZq2hA/baw60ws3V+FTVVZy/ezicjwyI211L5aomndtOM0IgVCGoCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:30:11.840858Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.10951","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1053c126c459179c3ea73829ef350f297f4ae9f1ce7d686604ec5aafc7c4fbf6","sha256:7bf48df5a1c71e4af6fa20690fc51e2616957b49afac1a2b4980df13dc58331b"],"state_sha256":"97d3a25f63069e397536e5810a046330ce63b2364341e364a55b32139205236d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dIwSBE6L34Z5/gO9D/ajWL+mtMU93NveyXgz01EKRGSTq25Lesk1L6rPzfzcJGzSrnFBYJhadW/ug8zYlwEMDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T12:11:34.264978Z","bundle_sha256":"19b7ea89d932bc68530df16227aeb590a48c4ffcaada245ce6b8ba24e5c92d1e"}}