{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:URXUQG3WI57UQM4JFTVNYR6RYW","short_pith_number":"pith:URXUQG3W","canonical_record":{"source":{"id":"2209.06244","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-13T18:05:53Z","cross_cats_sorted":[],"title_canon_sha256":"c18a78a057fc6a6387d15df1a2f9fd49b8b0df8c3296d8d0545899777f8bfdc5","abstract_canon_sha256":"5a8aae7adcc489af3079c38a5f8de12e46927f82bb52b0b96fee0b778849f85c"},"schema_version":"1.0"},"canonical_sha256":"a46f481b76477f4833892ceadc47d1c58dce2b75287c64d92066484f9b91fc87","source":{"kind":"arxiv","id":"2209.06244","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.06244","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"arxiv_version","alias_value":"2209.06244v2","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.06244","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_12","alias_value":"URXUQG3WI57U","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_16","alias_value":"URXUQG3WI57UQM4J","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_8","alias_value":"URXUQG3W","created_at":"2026-07-05T05:20:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:URXUQG3WI57UQM4JFTVNYR6RYW","target":"record","payload":{"canonical_record":{"source":{"id":"2209.06244","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-13T18:05:53Z","cross_cats_sorted":[],"title_canon_sha256":"c18a78a057fc6a6387d15df1a2f9fd49b8b0df8c3296d8d0545899777f8bfdc5","abstract_canon_sha256":"5a8aae7adcc489af3079c38a5f8de12e46927f82bb52b0b96fee0b778849f85c"},"schema_version":"1.0"},"canonical_sha256":"a46f481b76477f4833892ceadc47d1c58dce2b75287c64d92066484f9b91fc87","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:20:48.473934Z","signature_b64":"bpelLIQkit9cHIC9cgr+I+40Yf1lilQkk26943hs3xIhWdJe/tFfJ8meKAuS3Yn8yiMbWxw7Sz9lXviFUvoWBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a46f481b76477f4833892ceadc47d1c58dce2b75287c64d92066484f9b91fc87","last_reissued_at":"2026-07-05T05:20:48.473548Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:20:48.473548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2209.06244","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:20:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3nWmc8rpkTQPadlC7kH0zO1behNdDuf0CNvfXeIQ5ooQ4c0pAJ+qIK45tVwz9xS5ncDeK/TU9XXpC5eeGdvFBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T13:52:45.473392Z"},"content_sha256":"133d28557d669951e8a42f2ce6d33c73ab8e77ec1da3a97963c2693c982a5ef2","schema_version":"1.0","event_id":"sha256:133d28557d669951e8a42f2ce6d33c73ab8e77ec1da3a97963c2693c982a5ef2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:URXUQG3WI57UQM4JFTVNYR6RYW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Christian Henkel, David S. Meier, Erica Behrens, Jeffrey G. Mangum, Jonathan Holdship, Kazushi Sakamoto, Kimberly L. Emig, Kouichiro Nakanishi, Ko-Yun Huang, Kunihiko Tanaka, Laura Colzi, Nanase Harada, P.K. Humire, Rebeca Aladro, Ruben Herrero-Illana, Sebastien Muller, Serena Viti, Sergio Martin, Victor M. Rivilla, Yuki Yoshimura","submitted_at":"2022-09-13T18:05:53Z","abstract_excerpt":"We analyze HCN and HNC emission in the nearby starburst galaxy NGC 253 to investigate its effectiveness in tracing heating processes associated with star formation. This study uses multiple HCN and HNC rotational transitions observed using ALMA via the ALCHEMI Large Program. To understand the conditions and associated heating mechanisms within NGC 253's dense gas, we employ Bayesian nested sampling techniques applied to chemical and radiative transfer models which are constrained using our HCN and HNC measurements. We find that the volume density $n_{\\text{H}_{2}}$ and cosmic ray ionization ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.06244","kind":"arxiv","version":2},"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/2209.06244/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":"2026-07-05T05:20:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S0c43V3uQ7MjiAOqOBoPSQzpdSZVdIqgCjge/qEbQIF0sjkMwcmY4TzhDJgmYZXOl4eT+mr9lnwLwFemzCvRCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T13:52:45.474332Z"},"content_sha256":"09d14fc8601eebac348d8119650b4ee40891935991cb8c5ae59c2f48e6afea7d","schema_version":"1.0","event_id":"sha256:09d14fc8601eebac348d8119650b4ee40891935991cb8c5ae59c2f48e6afea7d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URXUQG3WI57UQM4JFTVNYR6RYW/bundle.json","state_url":"https://pith.science/pith/URXUQG3WI57UQM4JFTVNYR6RYW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URXUQG3WI57UQM4JFTVNYR6RYW/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":"2026-08-05T13:52:45Z","links":{"resolver":"https://pith.science/pith/URXUQG3WI57UQM4JFTVNYR6RYW","bundle":"https://pith.science/pith/URXUQG3WI57UQM4JFTVNYR6RYW/bundle.json","state":"https://pith.science/pith/URXUQG3WI57UQM4JFTVNYR6RYW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URXUQG3WI57UQM4JFTVNYR6RYW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:URXUQG3WI57UQM4JFTVNYR6RYW","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":"5a8aae7adcc489af3079c38a5f8de12e46927f82bb52b0b96fee0b778849f85c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-13T18:05:53Z","title_canon_sha256":"c18a78a057fc6a6387d15df1a2f9fd49b8b0df8c3296d8d0545899777f8bfdc5"},"schema_version":"1.0","source":{"id":"2209.06244","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.06244","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"arxiv_version","alias_value":"2209.06244v2","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.06244","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_12","alias_value":"URXUQG3WI57U","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_16","alias_value":"URXUQG3WI57UQM4J","created_at":"2026-07-05T05:20:48Z"},{"alias_kind":"pith_short_8","alias_value":"URXUQG3W","created_at":"2026-07-05T05:20:48Z"}],"graph_snapshots":[{"event_id":"sha256:09d14fc8601eebac348d8119650b4ee40891935991cb8c5ae59c2f48e6afea7d","target":"graph","created_at":"2026-07-05T05:20:48Z","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/2209.06244/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We analyze HCN and HNC emission in the nearby starburst galaxy NGC 253 to investigate its effectiveness in tracing heating processes associated with star formation. This study uses multiple HCN and HNC rotational transitions observed using ALMA via the ALCHEMI Large Program. To understand the conditions and associated heating mechanisms within NGC 253's dense gas, we employ Bayesian nested sampling techniques applied to chemical and radiative transfer models which are constrained using our HCN and HNC measurements. We find that the volume density $n_{\\text{H}_{2}}$ and cosmic ray ionization ra","authors_text":"Christian Henkel, David S. Meier, Erica Behrens, Jeffrey G. Mangum, Jonathan Holdship, Kazushi Sakamoto, Kimberly L. Emig, Kouichiro Nakanishi, Ko-Yun Huang, Kunihiko Tanaka, Laura Colzi, Nanase Harada, P.K. Humire, Rebeca Aladro, Ruben Herrero-Illana, Sebastien Muller, Serena Viti, Sergio Martin, Victor M. Rivilla, Yuki Yoshimura","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-13T18:05:53Z","title":"Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.06244","kind":"arxiv","version":2},"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":"sha256:133d28557d669951e8a42f2ce6d33c73ab8e77ec1da3a97963c2693c982a5ef2","target":"record","created_at":"2026-07-05T05:20:48Z","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":"5a8aae7adcc489af3079c38a5f8de12e46927f82bb52b0b96fee0b778849f85c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-13T18:05:53Z","title_canon_sha256":"c18a78a057fc6a6387d15df1a2f9fd49b8b0df8c3296d8d0545899777f8bfdc5"},"schema_version":"1.0","source":{"id":"2209.06244","kind":"arxiv","version":2}},"canonical_sha256":"a46f481b76477f4833892ceadc47d1c58dce2b75287c64d92066484f9b91fc87","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a46f481b76477f4833892ceadc47d1c58dce2b75287c64d92066484f9b91fc87","first_computed_at":"2026-07-05T05:20:48.473548Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:20:48.473548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bpelLIQkit9cHIC9cgr+I+40Yf1lilQkk26943hs3xIhWdJe/tFfJ8meKAuS3Yn8yiMbWxw7Sz9lXviFUvoWBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T05:20:48.473934Z","signed_message":"canonical_sha256_bytes"},"source_id":"2209.06244","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:133d28557d669951e8a42f2ce6d33c73ab8e77ec1da3a97963c2693c982a5ef2","sha256:09d14fc8601eebac348d8119650b4ee40891935991cb8c5ae59c2f48e6afea7d"],"state_sha256":"a002fd84a11d3c47269fa5e407a0d0dadca972897efc3512fd740c8fad7b671a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CrPP2O5gcha+UFrIXAChg7Xi4WolhgUNC1nT0ytPNmqnv/cqgBgQ8zQKJNMdADq1Mnq6nhL0BbRddFaqrUrxBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T13:52:45.485435Z","bundle_sha256":"1cbd752923d1e4f4a0d06473b7c377d24872cff3f8dd23c7165ba5d72021a81c"}}