{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:UHLC7XW6F4BZCRG3GASI75TLYT","short_pith_number":"pith:UHLC7XW6","canonical_record":{"source":{"id":"0804.1199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-04-08T07:45:13Z","cross_cats_sorted":[],"title_canon_sha256":"a1897b8d07c98ac9a318a108453757c94c64706b980cc6196ea940529f1434c5","abstract_canon_sha256":"045addf4050f54c5bb992c1bb3f1f6f0830a351aef6e0d488a41dd71a1ec9ace"},"schema_version":"1.0"},"canonical_sha256":"a1d62fdede2f039144db30248ff66bc4d9a71654e5bef2a80c0514c93f09a4ed","source":{"kind":"arxiv","id":"0804.1199","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.1199","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"arxiv_version","alias_value":"0804.1199v1","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.1199","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_12","alias_value":"UHLC7XW6F4BZ","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_16","alias_value":"UHLC7XW6F4BZCRG3","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_8","alias_value":"UHLC7XW6","created_at":"2026-07-04T17:10:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:UHLC7XW6F4BZCRG3GASI75TLYT","target":"record","payload":{"canonical_record":{"source":{"id":"0804.1199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-04-08T07:45:13Z","cross_cats_sorted":[],"title_canon_sha256":"a1897b8d07c98ac9a318a108453757c94c64706b980cc6196ea940529f1434c5","abstract_canon_sha256":"045addf4050f54c5bb992c1bb3f1f6f0830a351aef6e0d488a41dd71a1ec9ace"},"schema_version":"1.0"},"canonical_sha256":"a1d62fdede2f039144db30248ff66bc4d9a71654e5bef2a80c0514c93f09a4ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:10:15.520233Z","signature_b64":"glt1MwdDfzzb9GpWXFBXr5T05BYhQvz95fCADhlEtv0PhmswRc/0cf3EFbq8pCC6DsbCHbHDNiKyayHhWQr5Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1d62fdede2f039144db30248ff66bc4d9a71654e5bef2a80c0514c93f09a4ed","last_reissued_at":"2026-07-04T17:10:15.519836Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:10:15.519836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.1199","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":"2026-07-04T17:10:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zV/lq6dZb25Ea3xK9+IvymWaYb+9xhRb7HUq+54VDnXW0EO8gSCT+pVOzeP/a3/YIfeIR/bx3lWbwpYU52CjDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:40:55.405556Z"},"content_sha256":"eedc23cd1b3ae1e090dae695ea2ef00af3f8a662d760e50eb12e38010a4263c2","schema_version":"1.0","event_id":"sha256:eedc23cd1b3ae1e090dae695ea2ef00af3f8a662d760e50eb12e38010a4263c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:UHLC7XW6F4BZCRG3GASI75TLYT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The characteristics of the IR emission features in the spectra of Herbig Ae stars: Evidence for chemical evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.G.G.M. Tielens, C. Boersma, C. Van Kerckhoven, F. Lahuis, J. Bouwman, L.B.F.M. Waters, Th. Henning","submitted_at":"2008-04-08T07:45:13Z","abstract_excerpt":"Herbig Ae/Be stars are a class of young pre-main sequence stellar objects of intermediate mass and are known to have varying amounts of natal cloud material still present in their direct vicinity. We characterise the IR emission bands, due to fluorescence by PAH molecules, in the spectra of Herbig Ae/Be stars and link observed variations to spatial aspects of the mid-IR emission. We analysed two PAH dominated spectra from a sample of 15 Herbig Ae/Be stars observed with Spitzer and derive profiles of the major PAH bands. The shape and the measured band characteristics show pronounced variations"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.1199","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/0804.1199/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":"2026-07-04T17:10:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"thUPldiVcY8oxAhisEI1NNoDfQYGbvrxUaSzal8rrBAVV8ovucllb3ZBKLwSUhUm1m0q2z1XhMVjAjP0sJ3wBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:40:55.406090Z"},"content_sha256":"51552d77c96650ddc92eaecd0eabeb5a7f9f419c53e09a17184937433e61c3b6","schema_version":"1.0","event_id":"sha256:51552d77c96650ddc92eaecd0eabeb5a7f9f419c53e09a17184937433e61c3b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UHLC7XW6F4BZCRG3GASI75TLYT/bundle.json","state_url":"https://pith.science/pith/UHLC7XW6F4BZCRG3GASI75TLYT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UHLC7XW6F4BZCRG3GASI75TLYT/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":"2026-08-18T14:40:55Z","links":{"resolver":"https://pith.science/pith/UHLC7XW6F4BZCRG3GASI75TLYT","bundle":"https://pith.science/pith/UHLC7XW6F4BZCRG3GASI75TLYT/bundle.json","state":"https://pith.science/pith/UHLC7XW6F4BZCRG3GASI75TLYT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UHLC7XW6F4BZCRG3GASI75TLYT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:UHLC7XW6F4BZCRG3GASI75TLYT","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":"045addf4050f54c5bb992c1bb3f1f6f0830a351aef6e0d488a41dd71a1ec9ace","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-04-08T07:45:13Z","title_canon_sha256":"a1897b8d07c98ac9a318a108453757c94c64706b980cc6196ea940529f1434c5"},"schema_version":"1.0","source":{"id":"0804.1199","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.1199","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"arxiv_version","alias_value":"0804.1199v1","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.1199","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_12","alias_value":"UHLC7XW6F4BZ","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_16","alias_value":"UHLC7XW6F4BZCRG3","created_at":"2026-07-04T17:10:15Z"},{"alias_kind":"pith_short_8","alias_value":"UHLC7XW6","created_at":"2026-07-04T17:10:15Z"}],"graph_snapshots":[{"event_id":"sha256:51552d77c96650ddc92eaecd0eabeb5a7f9f419c53e09a17184937433e61c3b6","target":"graph","created_at":"2026-07-04T17:10:15Z","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/0804.1199/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Herbig Ae/Be stars are a class of young pre-main sequence stellar objects of intermediate mass and are known to have varying amounts of natal cloud material still present in their direct vicinity. We characterise the IR emission bands, due to fluorescence by PAH molecules, in the spectra of Herbig Ae/Be stars and link observed variations to spatial aspects of the mid-IR emission. We analysed two PAH dominated spectra from a sample of 15 Herbig Ae/Be stars observed with Spitzer and derive profiles of the major PAH bands. The shape and the measured band characteristics show pronounced variations","authors_text":"A.G.G.M. Tielens, C. Boersma, C. Van Kerckhoven, F. Lahuis, J. Bouwman, L.B.F.M. Waters, Th. Henning","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-04-08T07:45:13Z","title":"The characteristics of the IR emission features in the spectra of Herbig Ae stars: Evidence for chemical evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.1199","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:eedc23cd1b3ae1e090dae695ea2ef00af3f8a662d760e50eb12e38010a4263c2","target":"record","created_at":"2026-07-04T17:10:15Z","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":"045addf4050f54c5bb992c1bb3f1f6f0830a351aef6e0d488a41dd71a1ec9ace","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-04-08T07:45:13Z","title_canon_sha256":"a1897b8d07c98ac9a318a108453757c94c64706b980cc6196ea940529f1434c5"},"schema_version":"1.0","source":{"id":"0804.1199","kind":"arxiv","version":1}},"canonical_sha256":"a1d62fdede2f039144db30248ff66bc4d9a71654e5bef2a80c0514c93f09a4ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1d62fdede2f039144db30248ff66bc4d9a71654e5bef2a80c0514c93f09a4ed","first_computed_at":"2026-07-04T17:10:15.519836Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:10:15.519836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"glt1MwdDfzzb9GpWXFBXr5T05BYhQvz95fCADhlEtv0PhmswRc/0cf3EFbq8pCC6DsbCHbHDNiKyayHhWQr5Dw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:10:15.520233Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.1199","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eedc23cd1b3ae1e090dae695ea2ef00af3f8a662d760e50eb12e38010a4263c2","sha256:51552d77c96650ddc92eaecd0eabeb5a7f9f419c53e09a17184937433e61c3b6"],"state_sha256":"04013ad0f4393d0fe65c9ef59fa83798dbb2405bb11c2cb9bb1d0f567e8d1fe7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wSJp6OoX9HjjHEZ/w06ExfQhc+7iaPaaHIcETHQQKsV81ffuMmrEcH3uxl9P/lqGiRiwHR5Uu1n7TEIqG5V3BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T14:40:55.410883Z","bundle_sha256":"433a6e989b368fa2c37d21ae6628c80854e3be4caf6bbab31b19adbbc864d6e0"}}