{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:NSZWI5J3CPUZ7OHDACWBMROUK6","short_pith_number":"pith:NSZWI5J3","canonical_record":{"source":{"id":"2107.09381","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-20T09:57:45Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"0883bada56c50655a3f500ef3a39bdd94bc08bc7b176afaab093465d71e0fb5c","abstract_canon_sha256":"d634aee845f9b102f683544cef1d5e39f6dcb222b059b330f6660756df0d640a"},"schema_version":"1.0"},"canonical_sha256":"6cb364753b13e99fb8e300ac1645d457bbc5e480c171e2cddd25066ce639d91a","source":{"kind":"arxiv","id":"2107.09381","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09381","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09381v1","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09381","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_12","alias_value":"NSZWI5J3CPUZ","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_16","alias_value":"NSZWI5J3CPUZ7OHD","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_8","alias_value":"NSZWI5J3","created_at":"2026-07-05T03:08:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:NSZWI5J3CPUZ7OHDACWBMROUK6","target":"record","payload":{"canonical_record":{"source":{"id":"2107.09381","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-20T09:57:45Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"0883bada56c50655a3f500ef3a39bdd94bc08bc7b176afaab093465d71e0fb5c","abstract_canon_sha256":"d634aee845f9b102f683544cef1d5e39f6dcb222b059b330f6660756df0d640a"},"schema_version":"1.0"},"canonical_sha256":"6cb364753b13e99fb8e300ac1645d457bbc5e480c171e2cddd25066ce639d91a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:08:36.743581Z","signature_b64":"dFKFXyYExrT4bIBlQd4IGew68u6h1suXo7jrpwIPaLkfJLgRe9s3RlTmIvvPdaw69qBzC2Lx/YWGKktKOwFZBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6cb364753b13e99fb8e300ac1645d457bbc5e480c171e2cddd25066ce639d91a","last_reissued_at":"2026-07-05T03:08:36.742994Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:08:36.742994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.09381","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":"2026-07-05T03:08:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J9LKt/xdM8dP29xFj7RCgo09MR2NbWikwZevz3BxDaaMp9hjRHMOfhGN3IXdQ55WHI9WnJEQX+9VYC3rZgenBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T14:50:44.102873Z"},"content_sha256":"121602dbb091753a7b91c18c5ae4de6e35079aac703320e082156ac3ba33df29","schema_version":"1.0","event_id":"sha256:121602dbb091753a7b91c18c5ae4de6e35079aac703320e082156ac3ba33df29"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:NSZWI5J3CPUZ7OHDACWBMROUK6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopic measurements of CH$_3$OH in layered and mixed interstellar ice analogues","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.GA","authors_text":"(2) Universit\\\"ats-Sternwarte M\\\"unchen, B. M. Giuliano (1), B. M\\\"uller (1), Garching, Germany, Germany), M. Goto (2), M\\\"unchen, P. Caselli (1) ((1) Max-Planck-Institut f\\\"ur extraterrestrische Physik","submitted_at":"2021-07-20T09:57:45Z","abstract_excerpt":"Context. The molecular composition of interstellar ice mantles is defined by gas-grain processes in molecular clouds, with the main components being $H_2O$, $CO$, and $CO_2$. $CH_3OH$ ice is detected towards the denser regions, where large amounts of $CO$ freeze out and get hydrogenated. Heating from nearby protostars can further change the ice structure and composition. Despite the several observations of icy features towards molecular clouds and along the line of site of protostars, it is not yet clear if interstellar ices are mixed or if they have a layered structure. Aims. We aim to examin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09381","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/2107.09381/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":"2026-07-05T03:08:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IsINQ8P0VUoKBDiUcQQiqEjSZ9eyF0xPJny8vOsKnLo715aI2ATBGtB3CIVYznniwkJvlJlT7C2FV1jcFaLEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T14:50:44.103399Z"},"content_sha256":"a74b333f41be033325c7f758570c94f33de3435f4e44425ece8ab6f3ae6aed7f","schema_version":"1.0","event_id":"sha256:a74b333f41be033325c7f758570c94f33de3435f4e44425ece8ab6f3ae6aed7f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/bundle.json","state_url":"https://pith.science/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/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":"2026-08-12T14:50:44Z","links":{"resolver":"https://pith.science/pith/NSZWI5J3CPUZ7OHDACWBMROUK6","bundle":"https://pith.science/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/bundle.json","state":"https://pith.science/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NSZWI5J3CPUZ7OHDACWBMROUK6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:NSZWI5J3CPUZ7OHDACWBMROUK6","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":"d634aee845f9b102f683544cef1d5e39f6dcb222b059b330f6660756df0d640a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-20T09:57:45Z","title_canon_sha256":"0883bada56c50655a3f500ef3a39bdd94bc08bc7b176afaab093465d71e0fb5c"},"schema_version":"1.0","source":{"id":"2107.09381","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09381","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09381v1","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09381","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_12","alias_value":"NSZWI5J3CPUZ","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_16","alias_value":"NSZWI5J3CPUZ7OHD","created_at":"2026-07-05T03:08:36Z"},{"alias_kind":"pith_short_8","alias_value":"NSZWI5J3","created_at":"2026-07-05T03:08:36Z"}],"graph_snapshots":[{"event_id":"sha256:a74b333f41be033325c7f758570c94f33de3435f4e44425ece8ab6f3ae6aed7f","target":"graph","created_at":"2026-07-05T03:08:36Z","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/2107.09381/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Context. The molecular composition of interstellar ice mantles is defined by gas-grain processes in molecular clouds, with the main components being $H_2O$, $CO$, and $CO_2$. $CH_3OH$ ice is detected towards the denser regions, where large amounts of $CO$ freeze out and get hydrogenated. Heating from nearby protostars can further change the ice structure and composition. Despite the several observations of icy features towards molecular clouds and along the line of site of protostars, it is not yet clear if interstellar ices are mixed or if they have a layered structure. Aims. We aim to examin","authors_text":"(2) Universit\\\"ats-Sternwarte M\\\"unchen, B. M. Giuliano (1), B. M\\\"uller (1), Garching, Germany, Germany), M. Goto (2), M\\\"unchen, P. Caselli (1) ((1) Max-Planck-Institut f\\\"ur extraterrestrische Physik","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-20T09:57:45Z","title":"Spectroscopic measurements of CH$_3$OH in layered and mixed interstellar ice analogues"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09381","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":"sha256:121602dbb091753a7b91c18c5ae4de6e35079aac703320e082156ac3ba33df29","target":"record","created_at":"2026-07-05T03:08:36Z","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":"d634aee845f9b102f683544cef1d5e39f6dcb222b059b330f6660756df0d640a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-07-20T09:57:45Z","title_canon_sha256":"0883bada56c50655a3f500ef3a39bdd94bc08bc7b176afaab093465d71e0fb5c"},"schema_version":"1.0","source":{"id":"2107.09381","kind":"arxiv","version":1}},"canonical_sha256":"6cb364753b13e99fb8e300ac1645d457bbc5e480c171e2cddd25066ce639d91a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6cb364753b13e99fb8e300ac1645d457bbc5e480c171e2cddd25066ce639d91a","first_computed_at":"2026-07-05T03:08:36.742994Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:08:36.742994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dFKFXyYExrT4bIBlQd4IGew68u6h1suXo7jrpwIPaLkfJLgRe9s3RlTmIvvPdaw69qBzC2Lx/YWGKktKOwFZBg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:08:36.743581Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.09381","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:121602dbb091753a7b91c18c5ae4de6e35079aac703320e082156ac3ba33df29","sha256:a74b333f41be033325c7f758570c94f33de3435f4e44425ece8ab6f3ae6aed7f"],"state_sha256":"c049cf72863ea5faf60df0145f8ecf0c73a65953cf14676b9649865ca4d5c2b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ytxpdoaFDWLKhV9i9XFpN8jsmsWbNriyxXCZHaCG8uszGuzDzsU0PZoq/HTe7SOWlm8SvD5jYWEl39x3QAeoDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T14:50:44.111263Z","bundle_sha256":"91a41de0481053bb4de55c9f2a0c828252da2470a272c79d9975ff81e6138ef9"}}