{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:27J7RORMHZZSVDDHU4VI5KXZOC","short_pith_number":"pith:27J7RORM","canonical_record":{"source":{"id":"2306.05013","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-08T08:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"a2cf2bd7a3109f8510b13bb8e6d9d4b300cbfb185cab9430bbf9fa91e851ca9e","abstract_canon_sha256":"af3a7337f8123729763405363f8f003a9d8055245b150f3ab4e37283b0cda339"},"schema_version":"1.0"},"canonical_sha256":"d7d3f8ba2c3e732a8c67a72a8eaaf970ab71d2fe81c8337b361df8943581814f","source":{"kind":"arxiv","id":"2306.05013","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.05013","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"arxiv_version","alias_value":"2306.05013v1","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.05013","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_12","alias_value":"27J7RORMHZZS","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_16","alias_value":"27J7RORMHZZSVDDH","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_8","alias_value":"27J7RORM","created_at":"2026-07-05T06:38:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:27J7RORMHZZSVDDHU4VI5KXZOC","target":"record","payload":{"canonical_record":{"source":{"id":"2306.05013","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-08T08:07:36Z","cross_cats_sorted":[],"title_canon_sha256":"a2cf2bd7a3109f8510b13bb8e6d9d4b300cbfb185cab9430bbf9fa91e851ca9e","abstract_canon_sha256":"af3a7337f8123729763405363f8f003a9d8055245b150f3ab4e37283b0cda339"},"schema_version":"1.0"},"canonical_sha256":"d7d3f8ba2c3e732a8c67a72a8eaaf970ab71d2fe81c8337b361df8943581814f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:38:59.798326Z","signature_b64":"MIwIYFqfUod4UPvfCCUEM3/g+iOHcqZ9dHJG0JgbK3tlMdO6p6QJiytCv9HawvnrILE8aXM3fphjlqbLgLYCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7d3f8ba2c3e732a8c67a72a8eaaf970ab71d2fe81c8337b361df8943581814f","last_reissued_at":"2026-07-05T06:38:59.797818Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:38:59.797818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.05013","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":"2026-07-05T06:38:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fnp4HNGkcj3aQXeNV5hL6AYBvaSH98RS0Y/HzFpm+FBK6g7xxdyyEXff+oMF/OYiy1+MQ2sREyg52h7+3C8kBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T20:18:14.313220Z"},"content_sha256":"a741ccf784208202bde4594441ce2c3a047b9c8296c106f317b20c75fe620d4e","schema_version":"1.0","event_id":"sha256:a741ccf784208202bde4594441ce2c3a047b9c8296c106f317b20c75fe620d4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:27J7RORMHZZSVDDHU4VI5KXZOC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dense gas and star formation in the Outer Milky Way","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Floris F.S. van der Tak, Hao Chen, Jonathan Braine, Min Fang, Philippe Andr\\'e, Yan Sun, Yoshito Shimajiri, Yu Gao","submitted_at":"2023-06-08T08:07:36Z","abstract_excerpt":"We present maps and spectra of the HCN(1-0) and HCO$^+$(1-0) lines in the extreme outer Galaxy, at galactocentric radii between 14 and 22 kpc, with the 13.7 meter Delingha telescope. The 9 molecular clouds were selected from a CO/$^{13}$CO survey of the outer quadrants. The goal is to better understand the structure of molecular clouds in these poorly studied subsolar metallicity regions and the relation with star formation. The lines are all narrow, less than 2km/s at half power, enabling detection of the HCN hyperfine structure in the stronger sources and allowing us to observationally test "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.05013","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/2306.05013/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":"2026-07-05T06:38:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5oxc//OwAYw5PchL2mMooXOYLGMrFr3okB151Ct9l457EkH5lZrXBkZ0WxTSEYss3t46b4iE9fc0uhDF3UBTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T20:18:14.313598Z"},"content_sha256":"5337fc589aa6bd85e81c166d936f06d473dddfd147aa4dc8532964da259c9200","schema_version":"1.0","event_id":"sha256:5337fc589aa6bd85e81c166d936f06d473dddfd147aa4dc8532964da259c9200"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/27J7RORMHZZSVDDHU4VI5KXZOC/bundle.json","state_url":"https://pith.science/pith/27J7RORMHZZSVDDHU4VI5KXZOC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/27J7RORMHZZSVDDHU4VI5KXZOC/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":"2026-07-25T20:18:14Z","links":{"resolver":"https://pith.science/pith/27J7RORMHZZSVDDHU4VI5KXZOC","bundle":"https://pith.science/pith/27J7RORMHZZSVDDHU4VI5KXZOC/bundle.json","state":"https://pith.science/pith/27J7RORMHZZSVDDHU4VI5KXZOC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/27J7RORMHZZSVDDHU4VI5KXZOC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:27J7RORMHZZSVDDHU4VI5KXZOC","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":"af3a7337f8123729763405363f8f003a9d8055245b150f3ab4e37283b0cda339","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-08T08:07:36Z","title_canon_sha256":"a2cf2bd7a3109f8510b13bb8e6d9d4b300cbfb185cab9430bbf9fa91e851ca9e"},"schema_version":"1.0","source":{"id":"2306.05013","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.05013","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"arxiv_version","alias_value":"2306.05013v1","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.05013","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_12","alias_value":"27J7RORMHZZS","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_16","alias_value":"27J7RORMHZZSVDDH","created_at":"2026-07-05T06:38:59Z"},{"alias_kind":"pith_short_8","alias_value":"27J7RORM","created_at":"2026-07-05T06:38:59Z"}],"graph_snapshots":[{"event_id":"sha256:5337fc589aa6bd85e81c166d936f06d473dddfd147aa4dc8532964da259c9200","target":"graph","created_at":"2026-07-05T06:38:59Z","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/2306.05013/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present maps and spectra of the HCN(1-0) and HCO$^+$(1-0) lines in the extreme outer Galaxy, at galactocentric radii between 14 and 22 kpc, with the 13.7 meter Delingha telescope. The 9 molecular clouds were selected from a CO/$^{13}$CO survey of the outer quadrants. The goal is to better understand the structure of molecular clouds in these poorly studied subsolar metallicity regions and the relation with star formation. The lines are all narrow, less than 2km/s at half power, enabling detection of the HCN hyperfine structure in the stronger sources and allowing us to observationally test ","authors_text":"Floris F.S. van der Tak, Hao Chen, Jonathan Braine, Min Fang, Philippe Andr\\'e, Yan Sun, Yoshito Shimajiri, Yu Gao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-08T08:07:36Z","title":"Dense gas and star formation in the Outer Milky Way"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.05013","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:a741ccf784208202bde4594441ce2c3a047b9c8296c106f317b20c75fe620d4e","target":"record","created_at":"2026-07-05T06:38:59Z","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":"af3a7337f8123729763405363f8f003a9d8055245b150f3ab4e37283b0cda339","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-06-08T08:07:36Z","title_canon_sha256":"a2cf2bd7a3109f8510b13bb8e6d9d4b300cbfb185cab9430bbf9fa91e851ca9e"},"schema_version":"1.0","source":{"id":"2306.05013","kind":"arxiv","version":1}},"canonical_sha256":"d7d3f8ba2c3e732a8c67a72a8eaaf970ab71d2fe81c8337b361df8943581814f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7d3f8ba2c3e732a8c67a72a8eaaf970ab71d2fe81c8337b361df8943581814f","first_computed_at":"2026-07-05T06:38:59.797818Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:38:59.797818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MIwIYFqfUod4UPvfCCUEM3/g+iOHcqZ9dHJG0JgbK3tlMdO6p6QJiytCv9HawvnrILE8aXM3fphjlqbLgLYCDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:38:59.798326Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.05013","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a741ccf784208202bde4594441ce2c3a047b9c8296c106f317b20c75fe620d4e","sha256:5337fc589aa6bd85e81c166d936f06d473dddfd147aa4dc8532964da259c9200"],"state_sha256":"3fea0dfe61ef63109c6c24152085b00884e6bfad68c7de12f649f821d9762535"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yNqxyFBA/8y3PFP567yje0OPEfjqwRTyz7SI8x5fOFh+wxe0qbk1aUPvYZJo7B888GCwEiz/IbMqzE0oKBIsBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T20:18:14.315703Z","bundle_sha256":"7599b1f2dc854544bfa81fd0ac67d3107469ce87fa0895f0fc8be9300ac8ddcb"}}