{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:VUBOBHSO6UUL2HAHNGFY2HX5SE","short_pith_number":"pith:VUBOBHSO","canonical_record":{"source":{"id":"1211.3359","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-11-14T17:15:28Z","cross_cats_sorted":[],"title_canon_sha256":"96d2dd91e6403eff200806dd4bbc027f522adeae17ef1428b6bdec98a1d9909b","abstract_canon_sha256":"3537c4644f238d7d19d2e40ebc02a73fb4c7756f22c1ebf08a8d6f9840cd9e3e"},"schema_version":"1.0"},"canonical_sha256":"ad02e09e4ef528bd1c07698b8d1efd913ea7da4d7145f799877b5672d10ebe34","source":{"kind":"arxiv","id":"1211.3359","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.3359","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"arxiv_version","alias_value":"1211.3359v1","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.3359","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"pith_short_12","alias_value":"VUBOBHSO6UUL","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VUBOBHSO6UUL2HAH","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VUBOBHSO","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:VUBOBHSO6UUL2HAHNGFY2HX5SE","target":"record","payload":{"canonical_record":{"source":{"id":"1211.3359","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-11-14T17:15:28Z","cross_cats_sorted":[],"title_canon_sha256":"96d2dd91e6403eff200806dd4bbc027f522adeae17ef1428b6bdec98a1d9909b","abstract_canon_sha256":"3537c4644f238d7d19d2e40ebc02a73fb4c7756f22c1ebf08a8d6f9840cd9e3e"},"schema_version":"1.0"},"canonical_sha256":"ad02e09e4ef528bd1c07698b8d1efd913ea7da4d7145f799877b5672d10ebe34","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:11.292283Z","signature_b64":"u6qzATn0dbbvsuFsI7Wqc4duHwTklRcE6bb+yQp6fprDoY7qSIOXl45/Y3XdGtmDcz5UOiwySPqQUM8jjqIPAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad02e09e4ef528bd1c07698b8d1efd913ea7da4d7145f799877b5672d10ebe34","last_reissued_at":"2026-05-18T01:53:11.291634Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:11.291634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.3359","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":"2026-05-18T01:53:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZHpfQ2p+OGBXOvwg/E5bWneCXhyIv2Z+Wetg1HDOu+dh/wzsBlMbmK8z913e5fEYF3dqZSEH7+3cFell3bKACw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:33:36.600181Z"},"content_sha256":"03885af57bd25b63ad2aa16037785c9df6b774411fddeac5e947ecb0c9848628","schema_version":"1.0","event_id":"sha256:03885af57bd25b63ad2aa16037785c9df6b774411fddeac5e947ecb0c9848628"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:VUBOBHSO6UUL2HAHNGFY2HX5SE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Herschel/HIFI observations of [CII] and [13CII] in PDRs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Fuente, D. A. Neufeld, D. C. Lis, E. Bergin, F.F.S. van der Tak, M. R\\\"ollig, P. Pilleri, V. Ossenkopf","submitted_at":"2012-11-14T17:15:28Z","abstract_excerpt":"Recently, we introduced detailed isotopic chemistry into the KOSMA-tau model for photon-dominated regions (PDRs) to give theoretical predictions for the abundance of the carbon isotopologues as a function of PDR parameters. Combined with radiative transfer computations for specific geometries, we estimated the possible intensity ratio of the [CII]/[13CII] lines. Here, we compare these predictions with new observations.\n  We performed Herschel/HIFI observations of the [CII] 158micron line in a number of PDRs. In all sources we observed at least two hyperfine components of the [13CII] transition"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.3359","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":"2026-05-18T01:53:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XO8W0Tgawb2Alj0hs4aAOCGjD/yLdFZGisdOC+ttYvhw1ftT1/CIgmRa7vVFIh50vWEZZVCyPiYr5dQqkVKKDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T10:33:36.600540Z"},"content_sha256":"d506e4cd7cdc0592814b06f89f8840aafafcaa4c3898d2fcbee74e55f4b0d25c","schema_version":"1.0","event_id":"sha256:d506e4cd7cdc0592814b06f89f8840aafafcaa4c3898d2fcbee74e55f4b0d25c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/bundle.json","state_url":"https://pith.science/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/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":"2026-05-28T10:33:36Z","links":{"resolver":"https://pith.science/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE","bundle":"https://pith.science/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/bundle.json","state":"https://pith.science/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VUBOBHSO6UUL2HAHNGFY2HX5SE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:VUBOBHSO6UUL2HAHNGFY2HX5SE","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":"3537c4644f238d7d19d2e40ebc02a73fb4c7756f22c1ebf08a8d6f9840cd9e3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-11-14T17:15:28Z","title_canon_sha256":"96d2dd91e6403eff200806dd4bbc027f522adeae17ef1428b6bdec98a1d9909b"},"schema_version":"1.0","source":{"id":"1211.3359","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.3359","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"arxiv_version","alias_value":"1211.3359v1","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.3359","created_at":"2026-05-18T01:53:11Z"},{"alias_kind":"pith_short_12","alias_value":"VUBOBHSO6UUL","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"VUBOBHSO6UUL2HAH","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"VUBOBHSO","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:d506e4cd7cdc0592814b06f89f8840aafafcaa4c3898d2fcbee74e55f4b0d25c","target":"graph","created_at":"2026-05-18T01:53:11Z","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"},"paper":{"abstract_excerpt":"Recently, we introduced detailed isotopic chemistry into the KOSMA-tau model for photon-dominated regions (PDRs) to give theoretical predictions for the abundance of the carbon isotopologues as a function of PDR parameters. Combined with radiative transfer computations for specific geometries, we estimated the possible intensity ratio of the [CII]/[13CII] lines. Here, we compare these predictions with new observations.\n  We performed Herschel/HIFI observations of the [CII] 158micron line in a number of PDRs. In all sources we observed at least two hyperfine components of the [13CII] transition","authors_text":"A. Fuente, D. A. Neufeld, D. C. Lis, E. Bergin, F.F.S. van der Tak, M. R\\\"ollig, P. Pilleri, V. Ossenkopf","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-11-14T17:15:28Z","title":"Herschel/HIFI observations of [CII] and [13CII] in PDRs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.3359","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":"sha256:03885af57bd25b63ad2aa16037785c9df6b774411fddeac5e947ecb0c9848628","target":"record","created_at":"2026-05-18T01:53:11Z","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":"3537c4644f238d7d19d2e40ebc02a73fb4c7756f22c1ebf08a8d6f9840cd9e3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-11-14T17:15:28Z","title_canon_sha256":"96d2dd91e6403eff200806dd4bbc027f522adeae17ef1428b6bdec98a1d9909b"},"schema_version":"1.0","source":{"id":"1211.3359","kind":"arxiv","version":1}},"canonical_sha256":"ad02e09e4ef528bd1c07698b8d1efd913ea7da4d7145f799877b5672d10ebe34","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad02e09e4ef528bd1c07698b8d1efd913ea7da4d7145f799877b5672d10ebe34","first_computed_at":"2026-05-18T01:53:11.291634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:11.291634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u6qzATn0dbbvsuFsI7Wqc4duHwTklRcE6bb+yQp6fprDoY7qSIOXl45/Y3XdGtmDcz5UOiwySPqQUM8jjqIPAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:11.292283Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.3359","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03885af57bd25b63ad2aa16037785c9df6b774411fddeac5e947ecb0c9848628","sha256:d506e4cd7cdc0592814b06f89f8840aafafcaa4c3898d2fcbee74e55f4b0d25c"],"state_sha256":"8e5ddf6644a71ebed89b54fe39a43978c0b9682274de245d9137dc5b6b8ef0f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tX48WkGowZ6LYmGLqCdpe8ixWOtXmGafDgVYftTlOZlNFn0n7dKG3mRDlqhhn+OokrsPJZWS5JIktY4AnICHCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T10:33:36.602598Z","bundle_sha256":"ac72a6855a6e4fb2dcd997f37c69046c9910edfd12e5a95dbf546ce2c28214c7"}}