{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:TVIZFARCMFCNPJICL434PNWKU5","short_pith_number":"pith:TVIZFARC","canonical_record":{"source":{"id":"1302.4837","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-20T08:48:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a55ce149c34b60f38637a1c38f02be9b774ed746c277fc8d555d12b3c36d0713","abstract_canon_sha256":"0276dcd32eeca0886165c8584632c2502fa90eb7eed69650e6020cfd24fba02b"},"schema_version":"1.0"},"canonical_sha256":"9d519282226144d7a5025f37c7b6caa76ee9c5d70c6bd5cbecbcb1895b7b90ab","source":{"kind":"arxiv","id":"1302.4837","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4837","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4837v1","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4837","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"pith_short_12","alias_value":"TVIZFARCMFCN","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TVIZFARCMFCNPJIC","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TVIZFARC","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:TVIZFARCMFCNPJICL434PNWKU5","target":"record","payload":{"canonical_record":{"source":{"id":"1302.4837","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-20T08:48:06Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a55ce149c34b60f38637a1c38f02be9b774ed746c277fc8d555d12b3c36d0713","abstract_canon_sha256":"0276dcd32eeca0886165c8584632c2502fa90eb7eed69650e6020cfd24fba02b"},"schema_version":"1.0"},"canonical_sha256":"9d519282226144d7a5025f37c7b6caa76ee9c5d70c6bd5cbecbcb1895b7b90ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:35.079717Z","signature_b64":"y7tvGziNGDToU5/IfmFfaezaTczpKJAeXE0wOCj45TkiN5K0RcsqsfM9modPpRdgMnuwGPYlVDeX8NPJsYYxAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d519282226144d7a5025f37c7b6caa76ee9c5d70c6bd5cbecbcb1895b7b90ab","last_reissued_at":"2026-05-18T01:51:35.079227Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:35.079227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.4837","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":"2026-05-18T01:51:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fHtTZPKqxuCWCz+tl2Gqoc5ZGNSwcICaVqj95rPwCUNa+RnBbupOYDgtIcj7GQ8pBh7bjPtkNFikbu+hxoShDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:35:33.168876Z"},"content_sha256":"adcd0b4bb6ae8eab798f1620ce71579eb33449f9289727d3a356c8e5a12923c4","schema_version":"1.0","event_id":"sha256:adcd0b4bb6ae8eab798f1620ce71579eb33449f9289727d3a356c8e5a12923c4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:TVIZFARCMFCNPJICL434PNWKU5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polycyclic aromatic hydrocarbons in spatially resolved extragalactic star forming complexes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"D.S. Wiebe, M.S. Khramtsova, P.A. Boley, Ya.N. Pavlyuchenkov","submitted_at":"2013-02-20T08:48:06Z","abstract_excerpt":"The abundance of polycyclic aromatic hydrocarbons (PAHs) in low- and high-metallicity galaxies has been widely discussed since the time when detailed infrared data for extragalactic objects were first obtained. On the scales of entire galaxies, a smaller PAH abundance in lower-metallicity galaxies is often observed. We study this relationship for star-forming regions in nearby galaxies, for a sample containing more than 200 HII complexes, using spatially-resolved observations from the Herschel Space Observatory and Spitzer Space Telescope. We use a model for the dust emission to estimate the p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4837","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":""},"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":"2026-05-18T01:51:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"73yvjzasbotStjn74/BHaqBOyPcLxxfDvuEmyMdLWuidDUdmETA8lmDLaSRZ8GbZwvIVCaK2jz58d2dDGWWRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:35:33.169268Z"},"content_sha256":"a4fa3c304429afcf572850616273b6603501636fded373f58bf23ce42baa027d","schema_version":"1.0","event_id":"sha256:a4fa3c304429afcf572850616273b6603501636fded373f58bf23ce42baa027d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TVIZFARCMFCNPJICL434PNWKU5/bundle.json","state_url":"https://pith.science/pith/TVIZFARCMFCNPJICL434PNWKU5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TVIZFARCMFCNPJICL434PNWKU5/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":"2026-05-28T11:35:33Z","links":{"resolver":"https://pith.science/pith/TVIZFARCMFCNPJICL434PNWKU5","bundle":"https://pith.science/pith/TVIZFARCMFCNPJICL434PNWKU5/bundle.json","state":"https://pith.science/pith/TVIZFARCMFCNPJICL434PNWKU5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TVIZFARCMFCNPJICL434PNWKU5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TVIZFARCMFCNPJICL434PNWKU5","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":"0276dcd32eeca0886165c8584632c2502fa90eb7eed69650e6020cfd24fba02b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-20T08:48:06Z","title_canon_sha256":"a55ce149c34b60f38637a1c38f02be9b774ed746c277fc8d555d12b3c36d0713"},"schema_version":"1.0","source":{"id":"1302.4837","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4837","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4837v1","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4837","created_at":"2026-05-18T01:51:35Z"},{"alias_kind":"pith_short_12","alias_value":"TVIZFARCMFCN","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TVIZFARCMFCNPJIC","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TVIZFARC","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:a4fa3c304429afcf572850616273b6603501636fded373f58bf23ce42baa027d","target":"graph","created_at":"2026-05-18T01:51:35Z","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"},"paper":{"abstract_excerpt":"The abundance of polycyclic aromatic hydrocarbons (PAHs) in low- and high-metallicity galaxies has been widely discussed since the time when detailed infrared data for extragalactic objects were first obtained. On the scales of entire galaxies, a smaller PAH abundance in lower-metallicity galaxies is often observed. We study this relationship for star-forming regions in nearby galaxies, for a sample containing more than 200 HII complexes, using spatially-resolved observations from the Herschel Space Observatory and Spitzer Space Telescope. We use a model for the dust emission to estimate the p","authors_text":"D.S. Wiebe, M.S. Khramtsova, P.A. Boley, Ya.N. Pavlyuchenkov","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-20T08:48:06Z","title":"Polycyclic aromatic hydrocarbons in spatially resolved extragalactic star forming complexes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4837","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:adcd0b4bb6ae8eab798f1620ce71579eb33449f9289727d3a356c8e5a12923c4","target":"record","created_at":"2026-05-18T01:51:35Z","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":"0276dcd32eeca0886165c8584632c2502fa90eb7eed69650e6020cfd24fba02b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-20T08:48:06Z","title_canon_sha256":"a55ce149c34b60f38637a1c38f02be9b774ed746c277fc8d555d12b3c36d0713"},"schema_version":"1.0","source":{"id":"1302.4837","kind":"arxiv","version":1}},"canonical_sha256":"9d519282226144d7a5025f37c7b6caa76ee9c5d70c6bd5cbecbcb1895b7b90ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d519282226144d7a5025f37c7b6caa76ee9c5d70c6bd5cbecbcb1895b7b90ab","first_computed_at":"2026-05-18T01:51:35.079227Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:35.079227Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y7tvGziNGDToU5/IfmFfaezaTczpKJAeXE0wOCj45TkiN5K0RcsqsfM9modPpRdgMnuwGPYlVDeX8NPJsYYxAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:35.079717Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.4837","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:adcd0b4bb6ae8eab798f1620ce71579eb33449f9289727d3a356c8e5a12923c4","sha256:a4fa3c304429afcf572850616273b6603501636fded373f58bf23ce42baa027d"],"state_sha256":"c7051f3f8e691fcf5bef5e48b3f6c83374aca7ff7d6bb463bc1d48cb55e05b9c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IyRROAPJ5KjltFcHCOCLJes92euPfX+8cFvuHzMSwdlofxD3pAQg31k1N+qtk20NXXHk7Sh+kuf8/JJ6c6ZkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:35:33.171336Z","bundle_sha256":"a8b197cce00302e4ac02e739a3a7b8afb661865e67f97e0b40e9a85b68a927c2"}}