{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:45RJJYWRUD4VU24MEGSKFRCYC7","short_pith_number":"pith:45RJJYWR","canonical_record":{"source":{"id":"1801.08897","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-26T16:54:57Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"dd46b54abcc3ce23f9280c847a8d8dd65604d9995642da6175f2da7bfacd8c36","abstract_canon_sha256":"6a2b9eabf92ad35e18bf80cba3d905220eedae40ac354d6494953f493dfaf01e"},"schema_version":"1.0"},"canonical_sha256":"e76294e2d1a0f95a6b8c21a4a2c45817f423afe4f157d6184b9c94aab9ab2da6","source":{"kind":"arxiv","id":"1801.08897","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08897","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08897v1","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08897","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"pith_short_12","alias_value":"45RJJYWRUD4V","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"45RJJYWRUD4VU24M","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"45RJJYWR","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:45RJJYWRUD4VU24MEGSKFRCYC7","target":"record","payload":{"canonical_record":{"source":{"id":"1801.08897","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-26T16:54:57Z","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"title_canon_sha256":"dd46b54abcc3ce23f9280c847a8d8dd65604d9995642da6175f2da7bfacd8c36","abstract_canon_sha256":"6a2b9eabf92ad35e18bf80cba3d905220eedae40ac354d6494953f493dfaf01e"},"schema_version":"1.0"},"canonical_sha256":"e76294e2d1a0f95a6b8c21a4a2c45817f423afe4f157d6184b9c94aab9ab2da6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:07.441241Z","signature_b64":"7p6pxR+6JMdbK2zxoXfqZlDotxqFH/1/z3v1hTIvtPkUeVR7dLJCh61Klq7shcNVPxngsy2hJv/zs7NkaYHIDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e76294e2d1a0f95a6b8c21a4a2c45817f423afe4f157d6184b9c94aab9ab2da6","last_reissued_at":"2026-05-18T00:17:07.440484Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:07.440484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.08897","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":"2026-05-18T00:17:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fZqR4No6r6YG1RS/Pfib7+J0rnoPCNrXs4iX/ZAhrDuTZR7PF7mfDqCofbh/EuPadtURQdKJoPzTmjXa2TLuAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T16:12:56.440803Z"},"content_sha256":"740a3e294c08a97d2f036113becd3df056bbe763ff0e5f82ec6776d16cf93061","schema_version":"1.0","event_id":"sha256:740a3e294c08a97d2f036113becd3df056bbe763ff0e5f82ec6776d16cf93061"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:45RJJYWRUD4VU24MEGSKFRCYC7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal desorption of formamide and methylamine from graphite and amorphous water ice surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Fran\\c{c}ois Dulieu, Henda Chaabouni, Stephan Diana, Thanh Nguyen","submitted_at":"2018-01-26T16:54:57Z","abstract_excerpt":"Formamide (NH2CHO) and methylamine (CH3NH2) are known to be the most abundant amine-containing molecules in many astrophysical environments. The presence of these molecules in the gas phase may result from thermal desorption of interstellar ices. The aim of this work is to determine the values of the desorption energies of formamide and methylamine from analogues of interstellar dust grain surfaces and to understand their interaction with water ice. TPD experiments of formamide and methylamine ices were performed in the submonolayer and monolayer regimes on graphite (HOPG) and non-porous amorp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08897","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":""},"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":"2026-05-18T00:17:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G+Dkg8W8E6lN0mRe7NlmsnnU7WT0fV2vX3T3TRORz3ciqoz2rme+83sIg3/GJPWexuedVcUdxAPd1U36EVRtAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T16:12:56.441526Z"},"content_sha256":"b8bad8010306be00647b9862ac8142728dcc54821bd4418176faf5915c4eb1e8","schema_version":"1.0","event_id":"sha256:b8bad8010306be00647b9862ac8142728dcc54821bd4418176faf5915c4eb1e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/45RJJYWRUD4VU24MEGSKFRCYC7/bundle.json","state_url":"https://pith.science/pith/45RJJYWRUD4VU24MEGSKFRCYC7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/45RJJYWRUD4VU24MEGSKFRCYC7/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":"2026-06-08T16:12:56Z","links":{"resolver":"https://pith.science/pith/45RJJYWRUD4VU24MEGSKFRCYC7","bundle":"https://pith.science/pith/45RJJYWRUD4VU24MEGSKFRCYC7/bundle.json","state":"https://pith.science/pith/45RJJYWRUD4VU24MEGSKFRCYC7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/45RJJYWRUD4VU24MEGSKFRCYC7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:45RJJYWRUD4VU24MEGSKFRCYC7","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":"6a2b9eabf92ad35e18bf80cba3d905220eedae40ac354d6494953f493dfaf01e","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-26T16:54:57Z","title_canon_sha256":"dd46b54abcc3ce23f9280c847a8d8dd65604d9995642da6175f2da7bfacd8c36"},"schema_version":"1.0","source":{"id":"1801.08897","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.08897","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"arxiv_version","alias_value":"1801.08897v1","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.08897","created_at":"2026-05-18T00:17:07Z"},{"alias_kind":"pith_short_12","alias_value":"45RJJYWRUD4V","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"45RJJYWRUD4VU24M","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"45RJJYWR","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:b8bad8010306be00647b9862ac8142728dcc54821bd4418176faf5915c4eb1e8","target":"graph","created_at":"2026-05-18T00:17:07Z","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"},"paper":{"abstract_excerpt":"Formamide (NH2CHO) and methylamine (CH3NH2) are known to be the most abundant amine-containing molecules in many astrophysical environments. The presence of these molecules in the gas phase may result from thermal desorption of interstellar ices. The aim of this work is to determine the values of the desorption energies of formamide and methylamine from analogues of interstellar dust grain surfaces and to understand their interaction with water ice. TPD experiments of formamide and methylamine ices were performed in the submonolayer and monolayer regimes on graphite (HOPG) and non-porous amorp","authors_text":"Fran\\c{c}ois Dulieu, Henda Chaabouni, Stephan Diana, Thanh Nguyen","cross_cats":["astro-ph.IM","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-26T16:54:57Z","title":"Thermal desorption of formamide and methylamine from graphite and amorphous water ice surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08897","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":"sha256:740a3e294c08a97d2f036113becd3df056bbe763ff0e5f82ec6776d16cf93061","target":"record","created_at":"2026-05-18T00:17:07Z","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":"6a2b9eabf92ad35e18bf80cba3d905220eedae40ac354d6494953f493dfaf01e","cross_cats_sorted":["astro-ph.IM","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-26T16:54:57Z","title_canon_sha256":"dd46b54abcc3ce23f9280c847a8d8dd65604d9995642da6175f2da7bfacd8c36"},"schema_version":"1.0","source":{"id":"1801.08897","kind":"arxiv","version":1}},"canonical_sha256":"e76294e2d1a0f95a6b8c21a4a2c45817f423afe4f157d6184b9c94aab9ab2da6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e76294e2d1a0f95a6b8c21a4a2c45817f423afe4f157d6184b9c94aab9ab2da6","first_computed_at":"2026-05-18T00:17:07.440484Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:07.440484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7p6pxR+6JMdbK2zxoXfqZlDotxqFH/1/z3v1hTIvtPkUeVR7dLJCh61Klq7shcNVPxngsy2hJv/zs7NkaYHIDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:07.441241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.08897","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:740a3e294c08a97d2f036113becd3df056bbe763ff0e5f82ec6776d16cf93061","sha256:b8bad8010306be00647b9862ac8142728dcc54821bd4418176faf5915c4eb1e8"],"state_sha256":"20cb4dcc7cd8c8ea47cf945b082e4643a5435b3d532afd4f9521ef1ebca045d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"53rZpzpHG4p7cVXIB4l+LVfBiuJzQSE20hBDsdK5kVKmdy4VQdFOKT6vNRIFhp4PLc07LrLxODHcG6BIBAseDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T16:12:56.445778Z","bundle_sha256":"8410091c60c0733449f47e9b1c476053157c55b13e1983780c348ff2467ab7a6"}}