{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2CJHNZS42JOT27PC5L7ZXJK5F3","short_pith_number":"pith:2CJHNZS4","canonical_record":{"source":{"id":"1510.05135","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-17T15:35:30Z","cross_cats_sorted":[],"title_canon_sha256":"9fd39d65b33474e31aa8f5f4db9fa9a042ac565c875163982eb658a01e0a0793","abstract_canon_sha256":"576458b6154b1cd9d14b0db972590b5f6b5a0aa91e91e051120fa1a05cf94bd8"},"schema_version":"1.0"},"canonical_sha256":"d09276e65cd25d3d7de2eaff9ba55d2ef26447216b30f782265f2aead49dd7ca","source":{"kind":"arxiv","id":"1510.05135","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.05135","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"arxiv_version","alias_value":"1510.05135v2","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.05135","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"pith_short_12","alias_value":"2CJHNZS42JOT","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2CJHNZS42JOT27PC","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2CJHNZS4","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2CJHNZS42JOT27PC5L7ZXJK5F3","target":"record","payload":{"canonical_record":{"source":{"id":"1510.05135","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-17T15:35:30Z","cross_cats_sorted":[],"title_canon_sha256":"9fd39d65b33474e31aa8f5f4db9fa9a042ac565c875163982eb658a01e0a0793","abstract_canon_sha256":"576458b6154b1cd9d14b0db972590b5f6b5a0aa91e91e051120fa1a05cf94bd8"},"schema_version":"1.0"},"canonical_sha256":"d09276e65cd25d3d7de2eaff9ba55d2ef26447216b30f782265f2aead49dd7ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:51.532764Z","signature_b64":"IPZgrrf+0jTem/BefxFrqb1175NLLwBx1ZYVtO4WK6dxDiErmxrtYeGuQs0dQrhXYxXXabslFqx+XwFwk7nhBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d09276e65cd25d3d7de2eaff9ba55d2ef26447216b30f782265f2aead49dd7ca","last_reissued_at":"2026-05-18T01:24:51.532178Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:51.532178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.05135","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:24:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lRIzjkBId5+GkzJsXr61NfWYTKFdLQomM5NddtSNfs5JCiU1anB+rFv/E0slLgs51yHKG/AC1FxITDD8pJYBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:01:29.475609Z"},"content_sha256":"31fdb1ef76fed2210582e55775eec267e9da003a613b31b298ff1da6c45df989","schema_version":"1.0","event_id":"sha256:31fdb1ef76fed2210582e55775eec267e9da003a613b31b298ff1da6c45df989"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2CJHNZS42JOT27PC5L7ZXJK5F3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Water deuteration and ortho-to-para nuclear spin ratio of H2 in molecular clouds formed via the accumulation of HI gas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. I. Vasyunin, E. A. Bergin, Eric Herbst, G. E. Hassel, K. Furuya, U. Hincelin, Y. Aikawa","submitted_at":"2015-10-17T15:35:30Z","abstract_excerpt":"We investigate the water deuteration ratio and ortho-to-para nuclear spin ratio of H2 (OPR(H2)) during the formation and early evolution of a molecular cloud, following the scenario that accretion flows sweep and accumulate HI gas to form molecular clouds. We follow the physical evolution of post-shock materials using a one-dimensional shock model, with post-processing gas-ice chemistry simulations. This approach allows us to study the evolution of the OPR(H2) and water deuteration ratio without an arbitrary assumption concerning the initial molecular abundances, including the initial OPR(H2)."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05135","kind":"arxiv","version":2},"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":"2026-05-18T01:24:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+ua2OaQLOiPZtZXGfr3JnuTDYuMsVqfKthWXEUzYiImNhuisHAIR8g9xiYUmomneFa9H5KWhcg8jnWg/i2gtAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:01:29.476228Z"},"content_sha256":"6e104b9638bd2f083893c2981aff778183ae28b8516cae3a6bca0b33856522fb","schema_version":"1.0","event_id":"sha256:6e104b9638bd2f083893c2981aff778183ae28b8516cae3a6bca0b33856522fb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/bundle.json","state_url":"https://pith.science/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/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":"2026-05-25T17:01:29Z","links":{"resolver":"https://pith.science/pith/2CJHNZS42JOT27PC5L7ZXJK5F3","bundle":"https://pith.science/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/bundle.json","state":"https://pith.science/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2CJHNZS42JOT27PC5L7ZXJK5F3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2CJHNZS42JOT27PC5L7ZXJK5F3","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":"576458b6154b1cd9d14b0db972590b5f6b5a0aa91e91e051120fa1a05cf94bd8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-17T15:35:30Z","title_canon_sha256":"9fd39d65b33474e31aa8f5f4db9fa9a042ac565c875163982eb658a01e0a0793"},"schema_version":"1.0","source":{"id":"1510.05135","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.05135","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"arxiv_version","alias_value":"1510.05135v2","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.05135","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"pith_short_12","alias_value":"2CJHNZS42JOT","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2CJHNZS42JOT27PC","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2CJHNZS4","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:6e104b9638bd2f083893c2981aff778183ae28b8516cae3a6bca0b33856522fb","target":"graph","created_at":"2026-05-18T01:24:51Z","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":"We investigate the water deuteration ratio and ortho-to-para nuclear spin ratio of H2 (OPR(H2)) during the formation and early evolution of a molecular cloud, following the scenario that accretion flows sweep and accumulate HI gas to form molecular clouds. We follow the physical evolution of post-shock materials using a one-dimensional shock model, with post-processing gas-ice chemistry simulations. This approach allows us to study the evolution of the OPR(H2) and water deuteration ratio without an arbitrary assumption concerning the initial molecular abundances, including the initial OPR(H2).","authors_text":"A. I. Vasyunin, E. A. Bergin, Eric Herbst, G. E. Hassel, K. Furuya, U. Hincelin, Y. Aikawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-17T15:35:30Z","title":"Water deuteration and ortho-to-para nuclear spin ratio of H2 in molecular clouds formed via the accumulation of HI gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.05135","kind":"arxiv","version":2},"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":"sha256:31fdb1ef76fed2210582e55775eec267e9da003a613b31b298ff1da6c45df989","target":"record","created_at":"2026-05-18T01:24:51Z","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":"576458b6154b1cd9d14b0db972590b5f6b5a0aa91e91e051120fa1a05cf94bd8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-17T15:35:30Z","title_canon_sha256":"9fd39d65b33474e31aa8f5f4db9fa9a042ac565c875163982eb658a01e0a0793"},"schema_version":"1.0","source":{"id":"1510.05135","kind":"arxiv","version":2}},"canonical_sha256":"d09276e65cd25d3d7de2eaff9ba55d2ef26447216b30f782265f2aead49dd7ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d09276e65cd25d3d7de2eaff9ba55d2ef26447216b30f782265f2aead49dd7ca","first_computed_at":"2026-05-18T01:24:51.532178Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:51.532178Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IPZgrrf+0jTem/BefxFrqb1175NLLwBx1ZYVtO4WK6dxDiErmxrtYeGuQs0dQrhXYxXXabslFqx+XwFwk7nhBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:51.532764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.05135","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31fdb1ef76fed2210582e55775eec267e9da003a613b31b298ff1da6c45df989","sha256:6e104b9638bd2f083893c2981aff778183ae28b8516cae3a6bca0b33856522fb"],"state_sha256":"5961dc1d23468998319b0282ea411752323c01903b7ee98b23362432a9fff562"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8nx6+8Wg3i03zoaPkzyQ8eM+dbnsrmaq60c7fSxk+gAuwyKWogsiLqapqTmpE1diAwh4OXIrn1nzBkuKgaKpBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T17:01:29.479581Z","bundle_sha256":"ea37fe1e35526453cfbbbfcaf168009ce4dc2ad86bed49fd3b02cfe3681b64a7"}}