{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RZVGQKPOIMUC6YQ4CINUAVB766","short_pith_number":"pith:RZVGQKPO","canonical_record":{"source":{"id":"1904.04108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-08T15:00:09Z","cross_cats_sorted":[],"title_canon_sha256":"a22295a258224ed9d209bb70a80ddd58de258cb6f7f575943a31c8f42b1d11db","abstract_canon_sha256":"c9c581499ff553ac6f5b6588fb3affe433ee4cacd0af94d560b73bb189ad522e"},"schema_version":"1.0"},"canonical_sha256":"8e6a6829ee43282f621c121b40543ff7af25840781e970ba4b9229f9fae0c260","source":{"kind":"arxiv","id":"1904.04108","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.04108","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"arxiv_version","alias_value":"1904.04108v1","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.04108","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"pith_short_12","alias_value":"RZVGQKPOIMUC","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RZVGQKPOIMUC6YQ4","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RZVGQKPO","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RZVGQKPOIMUC6YQ4CINUAVB766","target":"record","payload":{"canonical_record":{"source":{"id":"1904.04108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-08T15:00:09Z","cross_cats_sorted":[],"title_canon_sha256":"a22295a258224ed9d209bb70a80ddd58de258cb6f7f575943a31c8f42b1d11db","abstract_canon_sha256":"c9c581499ff553ac6f5b6588fb3affe433ee4cacd0af94d560b73bb189ad522e"},"schema_version":"1.0"},"canonical_sha256":"8e6a6829ee43282f621c121b40543ff7af25840781e970ba4b9229f9fae0c260","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:02.268033Z","signature_b64":"r66NF6RWWpZ/m/IS6LCAcqPFqDzCOjJpwFR+yRDIYgwpq7Te5yv6v9dkAQ86HitEn5Nc34/YiAg1RqRuqrBCAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e6a6829ee43282f621c121b40543ff7af25840781e970ba4b9229f9fae0c260","last_reissued_at":"2026-05-17T23:44:02.267516Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:02.267516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.04108","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":"2026-05-17T23:44:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ud9cpTXsbJXpgh/uae7vN/YZWN0ZhRqUdil0HYIM7qodNUse6hOJcoEQaZymd/Vp6EW3tZiDGrY/qgXaHk51BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:49:31.205223Z"},"content_sha256":"9fd99b290c55038187e05b9afe717a61a6e6d5c7ee1738db17bd75edfca25da2","schema_version":"1.0","event_id":"sha256:9fd99b290c55038187e05b9afe717a61a6e6d5c7ee1738db17bd75edfca25da2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RZVGQKPOIMUC6YQ4CINUAVB766","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A systematic TMRT observational study of Galactic $^{12}$C/$^{13}$C ratios from Formaldehyde","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. Henkel, J. Huang, J. Li, J. M. Jian, J. S. Zhang, L. W. Jia, T. Mufakharov, X. D. Tang, Y. J. Wu, Y. Q. Li, Y. T. Yan, Y. X. Wang, Z. A. Zeng","submitted_at":"2019-04-08T15:00:09Z","abstract_excerpt":"We present observations of the C-band $1_{10}-1_{11}$ (4.8 GHz) and Ku-band $2_{11}-2_{12}$ (14.5 GHz) K-doublet lines of H$_2$CO and the C-band $1_{10}-1_{11}$ (4.6 GHz) line of H$_2$$^{13}$CO toward a large sample of Galactic molecular clouds, through the Shanghai Tianma 65-m radio telescope (TMRT). Our sample with 112 sources includes strong H$_2$CO sources from the TMRT molecular line survey at C-band and other known H$_2$CO sources. All three lines are detected toward 38 objects (43 radial velocity components) yielding a detection rate of 34\\%. Complementary observations of their continuu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.04108","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":"2026-05-17T23:44:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mc/TVI46t3vo653yidigA1RZ67frQCvNrF11iVMXhHDUcct+uPPk5CjsIwOqphFc0iGaQ0JR+aIZJKizKURVDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:49:31.205867Z"},"content_sha256":"9baff4a1328f2fca4d61f7199e80b117d0440e4172a600bb1e6e40a52aeb4b42","schema_version":"1.0","event_id":"sha256:9baff4a1328f2fca4d61f7199e80b117d0440e4172a600bb1e6e40a52aeb4b42"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RZVGQKPOIMUC6YQ4CINUAVB766/bundle.json","state_url":"https://pith.science/pith/RZVGQKPOIMUC6YQ4CINUAVB766/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RZVGQKPOIMUC6YQ4CINUAVB766/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":"2026-05-27T04:49:31Z","links":{"resolver":"https://pith.science/pith/RZVGQKPOIMUC6YQ4CINUAVB766","bundle":"https://pith.science/pith/RZVGQKPOIMUC6YQ4CINUAVB766/bundle.json","state":"https://pith.science/pith/RZVGQKPOIMUC6YQ4CINUAVB766/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RZVGQKPOIMUC6YQ4CINUAVB766/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RZVGQKPOIMUC6YQ4CINUAVB766","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":"c9c581499ff553ac6f5b6588fb3affe433ee4cacd0af94d560b73bb189ad522e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-08T15:00:09Z","title_canon_sha256":"a22295a258224ed9d209bb70a80ddd58de258cb6f7f575943a31c8f42b1d11db"},"schema_version":"1.0","source":{"id":"1904.04108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.04108","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"arxiv_version","alias_value":"1904.04108v1","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.04108","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"pith_short_12","alias_value":"RZVGQKPOIMUC","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RZVGQKPOIMUC6YQ4","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RZVGQKPO","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:9baff4a1328f2fca4d61f7199e80b117d0440e4172a600bb1e6e40a52aeb4b42","target":"graph","created_at":"2026-05-17T23:44:02Z","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 present observations of the C-band $1_{10}-1_{11}$ (4.8 GHz) and Ku-band $2_{11}-2_{12}$ (14.5 GHz) K-doublet lines of H$_2$CO and the C-band $1_{10}-1_{11}$ (4.6 GHz) line of H$_2$$^{13}$CO toward a large sample of Galactic molecular clouds, through the Shanghai Tianma 65-m radio telescope (TMRT). Our sample with 112 sources includes strong H$_2$CO sources from the TMRT molecular line survey at C-band and other known H$_2$CO sources. All three lines are detected toward 38 objects (43 radial velocity components) yielding a detection rate of 34\\%. Complementary observations of their continuu","authors_text":"C. Henkel, J. Huang, J. Li, J. M. Jian, J. S. Zhang, L. W. Jia, T. Mufakharov, X. D. Tang, Y. J. Wu, Y. Q. Li, Y. T. Yan, Y. X. Wang, Z. A. Zeng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-08T15:00:09Z","title":"A systematic TMRT observational study of Galactic $^{12}$C/$^{13}$C ratios from Formaldehyde"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.04108","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":"sha256:9fd99b290c55038187e05b9afe717a61a6e6d5c7ee1738db17bd75edfca25da2","target":"record","created_at":"2026-05-17T23:44:02Z","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":"c9c581499ff553ac6f5b6588fb3affe433ee4cacd0af94d560b73bb189ad522e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-08T15:00:09Z","title_canon_sha256":"a22295a258224ed9d209bb70a80ddd58de258cb6f7f575943a31c8f42b1d11db"},"schema_version":"1.0","source":{"id":"1904.04108","kind":"arxiv","version":1}},"canonical_sha256":"8e6a6829ee43282f621c121b40543ff7af25840781e970ba4b9229f9fae0c260","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e6a6829ee43282f621c121b40543ff7af25840781e970ba4b9229f9fae0c260","first_computed_at":"2026-05-17T23:44:02.267516Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:02.267516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r66NF6RWWpZ/m/IS6LCAcqPFqDzCOjJpwFR+yRDIYgwpq7Te5yv6v9dkAQ86HitEn5Nc34/YiAg1RqRuqrBCAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:02.268033Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.04108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9fd99b290c55038187e05b9afe717a61a6e6d5c7ee1738db17bd75edfca25da2","sha256:9baff4a1328f2fca4d61f7199e80b117d0440e4172a600bb1e6e40a52aeb4b42"],"state_sha256":"6749d06646454c18052823673014d4eda9b7798401e4716924e8baa0a983f395"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j0/nUdtwiY82atmjFcB3GAQy5ODDmvptmBOHXpsbv7LjFeHyZKHM6NOAcCQZ50SBOEmqWCmjNmvEU5nbLg7oDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T04:49:31.209420Z","bundle_sha256":"e232f41dc2eb9465eddd301256450a2919420e85d9c4a0e32304ec31c82c79c5"}}