{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:UXS7AN2FU7GXPDSWCMR6PQJPSK","short_pith_number":"pith:UXS7AN2F","canonical_record":{"source":{"id":"0711.2365","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-15T09:20:20Z","cross_cats_sorted":[],"title_canon_sha256":"06faedfbead1d2bf5752f31447194ec3f2a59a6acb655704ca53d006ce9f4c93","abstract_canon_sha256":"95730ff6205c122b1dabaeef52af3b59e50e8ac1401d2b324adf95e447a0e9c3"},"schema_version":"1.0"},"canonical_sha256":"a5e5f03745a7cd778e561323e7c12f92bb7cec600b2131301fa024fada9fa455","source":{"kind":"arxiv","id":"0711.2365","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0711.2365","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"arxiv_version","alias_value":"0711.2365v1","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0711.2365","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_12","alias_value":"UXS7AN2FU7GX","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_16","alias_value":"UXS7AN2FU7GXPDSW","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_8","alias_value":"UXS7AN2F","created_at":"2026-07-04T17:06:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:UXS7AN2FU7GXPDSWCMR6PQJPSK","target":"record","payload":{"canonical_record":{"source":{"id":"0711.2365","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-15T09:20:20Z","cross_cats_sorted":[],"title_canon_sha256":"06faedfbead1d2bf5752f31447194ec3f2a59a6acb655704ca53d006ce9f4c93","abstract_canon_sha256":"95730ff6205c122b1dabaeef52af3b59e50e8ac1401d2b324adf95e447a0e9c3"},"schema_version":"1.0"},"canonical_sha256":"a5e5f03745a7cd778e561323e7c12f92bb7cec600b2131301fa024fada9fa455","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:06:42.047331Z","signature_b64":"wlj51724Ct2KEPFM5MnNLKDct2ajlViVwlitrLlxn0u+4vbyIGc91sqMLnf49kiS1/yS27Obskrc6OBPQoSoCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a5e5f03745a7cd778e561323e7c12f92bb7cec600b2131301fa024fada9fa455","last_reissued_at":"2026-07-04T17:06:42.046954Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:06:42.046954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0711.2365","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":"2026-07-04T17:06:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nZo7kNh73OIlRKJv1S1iX2UJdtQnibkSMZZURIJMpwhWP/IMj2GaIbAKXuYEfrjDyvYZqRLTETlZ09nW6u96Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T14:42:39.970666Z"},"content_sha256":"539395afc9ce16a65c881488e3ac42c50925292c59d10f13d6cecde7bb9bcc0f","schema_version":"1.0","event_id":"sha256:539395afc9ce16a65c881488e3ac42c50925292c59d10f13d6cecde7bb9bcc0f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:UXS7AN2FU7GXPDSWCMR6PQJPSK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interstellar 12C/13C from CH+ absorption lines: Results from an extended survey","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"O. Stahl, S. Casassus, T.L. Wilson","submitted_at":"2007-11-15T09:20:20Z","abstract_excerpt":"The 12C/13C isotope ratio in the interstellar medium (ISM), and its evolution with time, is an important tracer of stellar yields. Spatial variations of this ratio can be used to study mixing in the ISM. We want to determine this ratio and its spatial variations in the local ISM from CH+ absorption lines in the optical towards early-type stars. The aim is to determine the average value for the local ISM and study possible spatial variations. We observed a large number of early-type stars with Feros to extend the sample of suitable target stars for CH+ isotope studies. The best suited targets w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0711.2365","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/0711.2365/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":"2026-07-04T17:06:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cZ6fvdr7i/CM42tuEd69vDrPPyOGG+Sj4GXgmj4X3kaE3Uv57Ox69tIZT5soiFGnYbmOpXI6zS6I73WugDbXAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T14:42:39.971182Z"},"content_sha256":"2379d7da0ffc43dcce1626ce3af12035e546e8aad0b70b608a044e843c155043","schema_version":"1.0","event_id":"sha256:2379d7da0ffc43dcce1626ce3af12035e546e8aad0b70b608a044e843c155043"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/bundle.json","state_url":"https://pith.science/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/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":"2026-08-06T14:42:39Z","links":{"resolver":"https://pith.science/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK","bundle":"https://pith.science/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/bundle.json","state":"https://pith.science/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UXS7AN2FU7GXPDSWCMR6PQJPSK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:UXS7AN2FU7GXPDSWCMR6PQJPSK","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":"95730ff6205c122b1dabaeef52af3b59e50e8ac1401d2b324adf95e447a0e9c3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-15T09:20:20Z","title_canon_sha256":"06faedfbead1d2bf5752f31447194ec3f2a59a6acb655704ca53d006ce9f4c93"},"schema_version":"1.0","source":{"id":"0711.2365","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0711.2365","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"arxiv_version","alias_value":"0711.2365v1","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0711.2365","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_12","alias_value":"UXS7AN2FU7GX","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_16","alias_value":"UXS7AN2FU7GXPDSW","created_at":"2026-07-04T17:06:42Z"},{"alias_kind":"pith_short_8","alias_value":"UXS7AN2F","created_at":"2026-07-04T17:06:42Z"}],"graph_snapshots":[{"event_id":"sha256:2379d7da0ffc43dcce1626ce3af12035e546e8aad0b70b608a044e843c155043","target":"graph","created_at":"2026-07-04T17:06:42Z","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/0711.2365/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The 12C/13C isotope ratio in the interstellar medium (ISM), and its evolution with time, is an important tracer of stellar yields. Spatial variations of this ratio can be used to study mixing in the ISM. We want to determine this ratio and its spatial variations in the local ISM from CH+ absorption lines in the optical towards early-type stars. The aim is to determine the average value for the local ISM and study possible spatial variations. We observed a large number of early-type stars with Feros to extend the sample of suitable target stars for CH+ isotope studies. The best suited targets w","authors_text":"O. Stahl, S. Casassus, T.L. Wilson","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-11-15T09:20:20Z","title":"Interstellar 12C/13C from CH+ absorption lines: Results from an extended survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0711.2365","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":"sha256:539395afc9ce16a65c881488e3ac42c50925292c59d10f13d6cecde7bb9bcc0f","target":"record","created_at":"2026-07-04T17:06:42Z","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":"95730ff6205c122b1dabaeef52af3b59e50e8ac1401d2b324adf95e447a0e9c3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-11-15T09:20:20Z","title_canon_sha256":"06faedfbead1d2bf5752f31447194ec3f2a59a6acb655704ca53d006ce9f4c93"},"schema_version":"1.0","source":{"id":"0711.2365","kind":"arxiv","version":1}},"canonical_sha256":"a5e5f03745a7cd778e561323e7c12f92bb7cec600b2131301fa024fada9fa455","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a5e5f03745a7cd778e561323e7c12f92bb7cec600b2131301fa024fada9fa455","first_computed_at":"2026-07-04T17:06:42.046954Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:06:42.046954Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wlj51724Ct2KEPFM5MnNLKDct2ajlViVwlitrLlxn0u+4vbyIGc91sqMLnf49kiS1/yS27Obskrc6OBPQoSoCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:06:42.047331Z","signed_message":"canonical_sha256_bytes"},"source_id":"0711.2365","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:539395afc9ce16a65c881488e3ac42c50925292c59d10f13d6cecde7bb9bcc0f","sha256:2379d7da0ffc43dcce1626ce3af12035e546e8aad0b70b608a044e843c155043"],"state_sha256":"15d2176f01af95506015ad8a58c068c4cc2bfdd19a24ab375841db7ad98fddac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1qqmDP9K4r+Ts+87Wlayxi0mrn7c64n1tbmWZX+OskCvNsk7nglKQOwzZzN4nxgdZrYXnsEceU2XsYFiPJoSCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T14:42:39.975672Z","bundle_sha256":"84c1ad3248568d1152274cbabf5138903ce58db0f40d12488bc2ec8e052c5a0d"}}