{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:PK53UHTZN3SAPH2RTG4T6OKKUI","short_pith_number":"pith:PK53UHTZ","canonical_record":{"source":{"id":"2608.04116","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-08-04T18:13:05Z","cross_cats_sorted":[],"title_canon_sha256":"f6bb99d9b1118adde5620fcad704f2a484e6fae40495cfe642d1ef5e987cbf10","abstract_canon_sha256":"276b8dccd46ddb664a4386b6086455eb2d89defc1bf49fdb4faca71395cda0db"},"schema_version":"1.0"},"canonical_sha256":"7abbba1e796ee4079f5199b93f394aa23d8b087d16483627261e496bbb189dd6","source":{"kind":"arxiv","id":"2608.04116","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.04116","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"arxiv_version","alias_value":"2608.04116v1","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.04116","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_12","alias_value":"PK53UHTZN3SA","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_16","alias_value":"PK53UHTZN3SAPH2R","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_8","alias_value":"PK53UHTZ","created_at":"2026-08-06T01:30:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:PK53UHTZN3SAPH2RTG4T6OKKUI","target":"record","payload":{"canonical_record":{"source":{"id":"2608.04116","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-08-04T18:13:05Z","cross_cats_sorted":[],"title_canon_sha256":"f6bb99d9b1118adde5620fcad704f2a484e6fae40495cfe642d1ef5e987cbf10","abstract_canon_sha256":"276b8dccd46ddb664a4386b6086455eb2d89defc1bf49fdb4faca71395cda0db"},"schema_version":"1.0"},"canonical_sha256":"7abbba1e796ee4079f5199b93f394aa23d8b087d16483627261e496bbb189dd6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-06T01:30:37.135385Z","signature_b64":"bzCM7XOuSLfqNKhBY2mr2D2zWkZh2GE1cnqIsh3OUCwHLzYOO+AYfKKGTxoxsXGS8snB4Fk41eG7W5OHwxsICg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7abbba1e796ee4079f5199b93f394aa23d8b087d16483627261e496bbb189dd6","last_reissued_at":"2026-08-06T01:30:37.133990Z","signature_status":"signed_v1","first_computed_at":"2026-08-06T01:30:37.133990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.04116","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":"2026-08-06T01:30:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZDBydwHTei41Rp3dKGvXKMQMLNg3KEG6/QXvScw/KWXbgSHNvGIczJEWm/TUOmkWIp3FCDFmi0hl47BRPDIKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T15:13:39.978520Z"},"content_sha256":"3d14def280a001d449d9c9c3bb1bb5a043402a71c57d26d05d655a5292a62931","schema_version":"1.0","event_id":"sha256:3d14def280a001d449d9c9c3bb1bb5a043402a71c57d26d05d655a5292a62931"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:PK53UHTZN3SAPH2RTG4T6OKKUI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Resolving dense photo-dissociation regions: the structure of photochemical fronts in three-dimensional gas distributions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Brandt A. L. Gaches, Lothar Brendel, Thomas G. Bisbas, Zhengping Zhu","submitted_at":"2026-08-04T18:13:05Z","abstract_excerpt":"For decades, the Orion Bar has been the prototypical photo-dissociation region. Viewed nearly edge-on, it offers a unique window into the stratified chemical structure of the atomic-to-molecular transition of the interstellar medium. Understanding its photochemistry is essential to interpreting key observations originating from dense photo-dissociation regions. ALMA and JWST observations reveal that H2 photo-dissociation front overlaps with the C+ recombination front and exhibits a complex spatial morphology. Despite considerable theoretical effort, existing modeling approaches based on simpli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.04116","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/2608.04116/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":"2026-08-06T01:30:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DHrcp5W50J+S2udvLfVf12/58Z3fHXb7PTrsB0SQ/WcE4kms5xJBji4eeKSbXoSVQCF2pOX15UV4kvYJUFnjCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T15:13:39.979087Z"},"content_sha256":"af64706ad1d1eea83e3a1129587834d586c5505a310ae71ee3c7b29501750e1c","schema_version":"1.0","event_id":"sha256:af64706ad1d1eea83e3a1129587834d586c5505a310ae71ee3c7b29501750e1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/bundle.json","state_url":"https://pith.science/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/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":"2026-08-16T15:13:39Z","links":{"resolver":"https://pith.science/pith/PK53UHTZN3SAPH2RTG4T6OKKUI","bundle":"https://pith.science/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/bundle.json","state":"https://pith.science/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PK53UHTZN3SAPH2RTG4T6OKKUI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:PK53UHTZN3SAPH2RTG4T6OKKUI","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":"276b8dccd46ddb664a4386b6086455eb2d89defc1bf49fdb4faca71395cda0db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-08-04T18:13:05Z","title_canon_sha256":"f6bb99d9b1118adde5620fcad704f2a484e6fae40495cfe642d1ef5e987cbf10"},"schema_version":"1.0","source":{"id":"2608.04116","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.04116","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"arxiv_version","alias_value":"2608.04116v1","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.04116","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_12","alias_value":"PK53UHTZN3SA","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_16","alias_value":"PK53UHTZN3SAPH2R","created_at":"2026-08-06T01:30:37Z"},{"alias_kind":"pith_short_8","alias_value":"PK53UHTZ","created_at":"2026-08-06T01:30:37Z"}],"graph_snapshots":[{"event_id":"sha256:af64706ad1d1eea83e3a1129587834d586c5505a310ae71ee3c7b29501750e1c","target":"graph","created_at":"2026-08-06T01:30:37Z","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/2608.04116/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"For decades, the Orion Bar has been the prototypical photo-dissociation region. Viewed nearly edge-on, it offers a unique window into the stratified chemical structure of the atomic-to-molecular transition of the interstellar medium. Understanding its photochemistry is essential to interpreting key observations originating from dense photo-dissociation regions. ALMA and JWST observations reveal that H2 photo-dissociation front overlaps with the C+ recombination front and exhibits a complex spatial morphology. Despite considerable theoretical effort, existing modeling approaches based on simpli","authors_text":"Brandt A. L. Gaches, Lothar Brendel, Thomas G. Bisbas, Zhengping Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-08-04T18:13:05Z","title":"Resolving dense photo-dissociation regions: the structure of photochemical fronts in three-dimensional gas distributions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.04116","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":"sha256:3d14def280a001d449d9c9c3bb1bb5a043402a71c57d26d05d655a5292a62931","target":"record","created_at":"2026-08-06T01:30:37Z","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":"276b8dccd46ddb664a4386b6086455eb2d89defc1bf49fdb4faca71395cda0db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-08-04T18:13:05Z","title_canon_sha256":"f6bb99d9b1118adde5620fcad704f2a484e6fae40495cfe642d1ef5e987cbf10"},"schema_version":"1.0","source":{"id":"2608.04116","kind":"arxiv","version":1}},"canonical_sha256":"7abbba1e796ee4079f5199b93f394aa23d8b087d16483627261e496bbb189dd6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7abbba1e796ee4079f5199b93f394aa23d8b087d16483627261e496bbb189dd6","first_computed_at":"2026-08-06T01:30:37.133990Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-06T01:30:37.133990Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bzCM7XOuSLfqNKhBY2mr2D2zWkZh2GE1cnqIsh3OUCwHLzYOO+AYfKKGTxoxsXGS8snB4Fk41eG7W5OHwxsICg==","signature_status":"signed_v1","signed_at":"2026-08-06T01:30:37.135385Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.04116","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d14def280a001d449d9c9c3bb1bb5a043402a71c57d26d05d655a5292a62931","sha256:af64706ad1d1eea83e3a1129587834d586c5505a310ae71ee3c7b29501750e1c"],"state_sha256":"ce49388f4c88c0f22d5a1b1c194b42ee43964236e70f686c24a7bb58f059c7a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x0uC6q/PbGvBrjGmkWYSGAvveg4DMXa7HGBiu4vgITzfXxQovbGU5AwvQiQSnx9y7XA2z0rL+2aGLjtm1a82CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T15:13:39.983038Z","bundle_sha256":"e20ae8a7262d0ca042b90b0cb7d72acf030dc0b0e32ea2c3ae75257fae6606f0"}}