{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:ZTT3HMSONFOOP24VCVB3XVRD6Z","short_pith_number":"pith:ZTT3HMSO","canonical_record":{"source":{"id":"2204.04744","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-04-10T18:44:16Z","cross_cats_sorted":[],"title_canon_sha256":"59a114ef968a2500206687ab6ad70f1e9083765382bedcfeefce67349120478f","abstract_canon_sha256":"7ddd187c6ce906d2e1bbe927d3aef67e2bc500ba4a09e59059e466c29bc41bda"},"schema_version":"1.0"},"canonical_sha256":"cce7b3b24e695ce7eb951543bbd623f67fb2422b7f6fb7ec761ed76131430ac8","source":{"kind":"arxiv","id":"2204.04744","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.04744","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"arxiv_version","alias_value":"2204.04744v1","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.04744","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZTT3HMSONFOO","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_16","alias_value":"ZTT3HMSONFOOP24V","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_8","alias_value":"ZTT3HMSO","created_at":"2026-07-05T05:05:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:ZTT3HMSONFOOP24VCVB3XVRD6Z","target":"record","payload":{"canonical_record":{"source":{"id":"2204.04744","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-04-10T18:44:16Z","cross_cats_sorted":[],"title_canon_sha256":"59a114ef968a2500206687ab6ad70f1e9083765382bedcfeefce67349120478f","abstract_canon_sha256":"7ddd187c6ce906d2e1bbe927d3aef67e2bc500ba4a09e59059e466c29bc41bda"},"schema_version":"1.0"},"canonical_sha256":"cce7b3b24e695ce7eb951543bbd623f67fb2422b7f6fb7ec761ed76131430ac8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:05:32.843687Z","signature_b64":"b1tMWUk18Bg8DgPL1RlKhZmX86dNb3sP9ROGZSGYvTJlW/+PjNW9kAezbpup6yInhuAq8xJL1/ugK0JOYIg/Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cce7b3b24e695ce7eb951543bbd623f67fb2422b7f6fb7ec761ed76131430ac8","last_reissued_at":"2026-07-05T05:05:32.843130Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:05:32.843130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2204.04744","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":"2026-07-05T05:05:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ewspkhOcPu8IPUpztNX/OvF193IQJGG1HPCesEwalj0yG6n/Cs2wGeZSZGpU9unRXJExWIcRMbYzjjcRRtK6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T05:52:01.803703Z"},"content_sha256":"09711096a1f8e5b52f52b2e11bd22f9a2e08b0fd1b2706bfa03e5957f025a394","schema_version":"1.0","event_id":"sha256:09711096a1f8e5b52f52b2e11bd22f9a2e08b0fd1b2706bfa03e5957f025a394"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:ZTT3HMSONFOOP24VCVB3XVRD6Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Search for Heterocycles in GOTHAM Observations of TMC-1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andrew M. Burkhardt, Anthony J. Remijan, Brett A. McGuire, Ci Xue, Ilsa R. Cooke, Kin Long Kelvin Lee, Madelyn L. Sita, Mark A. Siebert, P. Bryan Changala, Ryan A. Loomis, Steven B. Charnley, Timothy J. Barnum","submitted_at":"2022-04-10T18:44:16Z","abstract_excerpt":"We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope. Despite their ubiquity in terrestrial chemistry, and the confirmed presence of a number of cyclic and polycyclic hydrocarbon species in the source, we find no evidence for the presence of any heterocyclic species. Here, we report the derived upper limits on the column densities of these molecules obtained by Markov Chain Mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.04744","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/2204.04744/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":"2026-07-05T05:05:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y0B2nPKo66BKDd1pJgFzLt+uNrQKAgsEEI9s6nzT40SNK61re/1136mVTulsRXMyi7imSF6XQTYnHIpPTgBnBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T05:52:01.804208Z"},"content_sha256":"8ca2e718a171d336f0d81955bb28750b9a307f6da0a7e10f6f0447539e195980","schema_version":"1.0","event_id":"sha256:8ca2e718a171d336f0d81955bb28750b9a307f6da0a7e10f6f0447539e195980"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/bundle.json","state_url":"https://pith.science/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/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":"2026-08-22T05:52:01Z","links":{"resolver":"https://pith.science/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z","bundle":"https://pith.science/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/bundle.json","state":"https://pith.science/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZTT3HMSONFOOP24VCVB3XVRD6Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:ZTT3HMSONFOOP24VCVB3XVRD6Z","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":"7ddd187c6ce906d2e1bbe927d3aef67e2bc500ba4a09e59059e466c29bc41bda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-04-10T18:44:16Z","title_canon_sha256":"59a114ef968a2500206687ab6ad70f1e9083765382bedcfeefce67349120478f"},"schema_version":"1.0","source":{"id":"2204.04744","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.04744","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"arxiv_version","alias_value":"2204.04744v1","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.04744","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_12","alias_value":"ZTT3HMSONFOO","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_16","alias_value":"ZTT3HMSONFOOP24V","created_at":"2026-07-05T05:05:32Z"},{"alias_kind":"pith_short_8","alias_value":"ZTT3HMSO","created_at":"2026-07-05T05:05:32Z"}],"graph_snapshots":[{"event_id":"sha256:8ca2e718a171d336f0d81955bb28750b9a307f6da0a7e10f6f0447539e195980","target":"graph","created_at":"2026-07-05T05:05:32Z","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/2204.04744/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope. Despite their ubiquity in terrestrial chemistry, and the confirmed presence of a number of cyclic and polycyclic hydrocarbon species in the source, we find no evidence for the presence of any heterocyclic species. Here, we report the derived upper limits on the column densities of these molecules obtained by Markov Chain Mo","authors_text":"Andrew M. Burkhardt, Anthony J. Remijan, Brett A. McGuire, Ci Xue, Ilsa R. Cooke, Kin Long Kelvin Lee, Madelyn L. Sita, Mark A. Siebert, P. Bryan Changala, Ryan A. Loomis, Steven B. Charnley, Timothy J. Barnum","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-04-10T18:44:16Z","title":"A Search for Heterocycles in GOTHAM Observations of TMC-1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.04744","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":"sha256:09711096a1f8e5b52f52b2e11bd22f9a2e08b0fd1b2706bfa03e5957f025a394","target":"record","created_at":"2026-07-05T05:05:32Z","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":"7ddd187c6ce906d2e1bbe927d3aef67e2bc500ba4a09e59059e466c29bc41bda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-04-10T18:44:16Z","title_canon_sha256":"59a114ef968a2500206687ab6ad70f1e9083765382bedcfeefce67349120478f"},"schema_version":"1.0","source":{"id":"2204.04744","kind":"arxiv","version":1}},"canonical_sha256":"cce7b3b24e695ce7eb951543bbd623f67fb2422b7f6fb7ec761ed76131430ac8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cce7b3b24e695ce7eb951543bbd623f67fb2422b7f6fb7ec761ed76131430ac8","first_computed_at":"2026-07-05T05:05:32.843130Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:05:32.843130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"b1tMWUk18Bg8DgPL1RlKhZmX86dNb3sP9ROGZSGYvTJlW/+PjNW9kAezbpup6yInhuAq8xJL1/ugK0JOYIg/Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:05:32.843687Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.04744","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09711096a1f8e5b52f52b2e11bd22f9a2e08b0fd1b2706bfa03e5957f025a394","sha256:8ca2e718a171d336f0d81955bb28750b9a307f6da0a7e10f6f0447539e195980"],"state_sha256":"bbea3ffdabad5e4c8b69bb553f3c85b86f7c6a00f834980c61e36cd30b403984"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZCd7RGRX1SWdR5UzDRbfjnssZRm3sIE1NO3hgwprLxysMr3FvBiOyIWsrAZu7iU3FJ6DtzentDavfUW6W4jJCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T05:52:01.807923Z","bundle_sha256":"803555245e0c3ca3e9828ea2967851e4ce5de8d1e90a50deae3e54a7398037ec"}}