{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:DGAETDCA67O4TUEPJNVHBKRQIC","short_pith_number":"pith:DGAETDCA","canonical_record":{"source":{"id":"0903.0775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-04T14:57:06Z","cross_cats_sorted":[],"title_canon_sha256":"1f098756df83498ea02af04233c488016e2b342c2375685909f31d6e2a48d159","abstract_canon_sha256":"fc471b07a71d6be6524fc99ddd3ba99c80c98b15a2afb6f8ee2434750a45abc0"},"schema_version":"1.0"},"canonical_sha256":"1980498c40f7ddc9d08f4b6a70aa304092f2646e76de3415f3f51f1efe320640","source":{"kind":"arxiv","id":"0903.0775","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.0775","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"arxiv_version","alias_value":"0903.0775v1","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0775","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"pith_short_12","alias_value":"DGAETDCA67O4","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"DGAETDCA67O4TUEP","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"DGAETDCA","created_at":"2026-05-18T12:25:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:DGAETDCA67O4TUEPJNVHBKRQIC","target":"record","payload":{"canonical_record":{"source":{"id":"0903.0775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-04T14:57:06Z","cross_cats_sorted":[],"title_canon_sha256":"1f098756df83498ea02af04233c488016e2b342c2375685909f31d6e2a48d159","abstract_canon_sha256":"fc471b07a71d6be6524fc99ddd3ba99c80c98b15a2afb6f8ee2434750a45abc0"},"schema_version":"1.0"},"canonical_sha256":"1980498c40f7ddc9d08f4b6a70aa304092f2646e76de3415f3f51f1efe320640","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:16.170210Z","signature_b64":"tFtbK2tibdyrHnCk+li4I/ERrnaQFbMjkmUr1Zi67agAfIZEtkQv2Ul/EYTrQ1CLPs5EgEVupdtACLDk6NfbBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1980498c40f7ddc9d08f4b6a70aa304092f2646e76de3415f3f51f1efe320640","last_reissued_at":"2026-05-18T04:29:16.169771Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:16.169771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.0775","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":"2026-05-18T04:29:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OsbdEaO3vLGiVhYRagSSjzHWvUR/mibpNncQ8XJWcrje5M29tUH/nypeVjow1QZbtzx/N+ytDeOQynB/8mEUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:43:00.755830Z"},"content_sha256":"97ce6436e28575250c0e8dc910f0fb234dbae7d23b3e012ae34d1d43f510ae1c","schema_version":"1.0","event_id":"sha256:97ce6436e28575250c0e8dc910f0fb234dbae7d23b3e012ae34d1d43f510ae1c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:DGAETDCA67O4TUEPJNVHBKRQIC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Formation of PAHs and Carbonaceous Solids in Gas-Phase Condensation Experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"C. J\\\"ager, F. Huisken, H. Mutschke, I. Llamas Jansa, Th. Henning","submitted_at":"2009-03-04T14:57:06Z","abstract_excerpt":"Carbonaceous grains represent a major component of cosmic dust. In order to understand their formation pathways, they have been prepared in the laboratory by gas-phase condensation reactions such as laser pyrolysis and laser ablation. Our studies demonstrate that the temperature in the condensation zone determines the formation pathway of carbonaceous particles. At temperatures lower than 1700 K, the condensation by-products are mainly polycyclic aromatic hydrocarbons (PAHs), that are also the precursors or building blocks for the condensing soot grains. The low-temperature condensates contain"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0775","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":"2026-05-18T04:29:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BzqaNHOZ9pfMH+0OpLewuULmXrRofIIO23kmxL8iqRLvpnBeU5l7swQJKwGgOtLnmO767xjRSHMCUChBuzjkCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:43:00.756440Z"},"content_sha256":"b81595bfbff8355ce16494f0d5b0b86b6858057721f721801838daeef0354359","schema_version":"1.0","event_id":"sha256:b81595bfbff8355ce16494f0d5b0b86b6858057721f721801838daeef0354359"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DGAETDCA67O4TUEPJNVHBKRQIC/bundle.json","state_url":"https://pith.science/pith/DGAETDCA67O4TUEPJNVHBKRQIC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DGAETDCA67O4TUEPJNVHBKRQIC/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":"2026-05-31T02:43:00Z","links":{"resolver":"https://pith.science/pith/DGAETDCA67O4TUEPJNVHBKRQIC","bundle":"https://pith.science/pith/DGAETDCA67O4TUEPJNVHBKRQIC/bundle.json","state":"https://pith.science/pith/DGAETDCA67O4TUEPJNVHBKRQIC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DGAETDCA67O4TUEPJNVHBKRQIC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:DGAETDCA67O4TUEPJNVHBKRQIC","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":"fc471b07a71d6be6524fc99ddd3ba99c80c98b15a2afb6f8ee2434750a45abc0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-04T14:57:06Z","title_canon_sha256":"1f098756df83498ea02af04233c488016e2b342c2375685909f31d6e2a48d159"},"schema_version":"1.0","source":{"id":"0903.0775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.0775","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"arxiv_version","alias_value":"0903.0775v1","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0775","created_at":"2026-05-18T04:29:16Z"},{"alias_kind":"pith_short_12","alias_value":"DGAETDCA67O4","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"DGAETDCA67O4TUEP","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"DGAETDCA","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:b81595bfbff8355ce16494f0d5b0b86b6858057721f721801838daeef0354359","target":"graph","created_at":"2026-05-18T04:29:16Z","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":"Carbonaceous grains represent a major component of cosmic dust. In order to understand their formation pathways, they have been prepared in the laboratory by gas-phase condensation reactions such as laser pyrolysis and laser ablation. Our studies demonstrate that the temperature in the condensation zone determines the formation pathway of carbonaceous particles. At temperatures lower than 1700 K, the condensation by-products are mainly polycyclic aromatic hydrocarbons (PAHs), that are also the precursors or building blocks for the condensing soot grains. The low-temperature condensates contain","authors_text":"C. J\\\"ager, F. Huisken, H. Mutschke, I. Llamas Jansa, Th. Henning","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-04T14:57:06Z","title":"Formation of PAHs and Carbonaceous Solids in Gas-Phase Condensation Experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0775","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":"sha256:97ce6436e28575250c0e8dc910f0fb234dbae7d23b3e012ae34d1d43f510ae1c","target":"record","created_at":"2026-05-18T04:29:16Z","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":"fc471b07a71d6be6524fc99ddd3ba99c80c98b15a2afb6f8ee2434750a45abc0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-04T14:57:06Z","title_canon_sha256":"1f098756df83498ea02af04233c488016e2b342c2375685909f31d6e2a48d159"},"schema_version":"1.0","source":{"id":"0903.0775","kind":"arxiv","version":1}},"canonical_sha256":"1980498c40f7ddc9d08f4b6a70aa304092f2646e76de3415f3f51f1efe320640","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1980498c40f7ddc9d08f4b6a70aa304092f2646e76de3415f3f51f1efe320640","first_computed_at":"2026-05-18T04:29:16.169771Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:16.169771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tFtbK2tibdyrHnCk+li4I/ERrnaQFbMjkmUr1Zi67agAfIZEtkQv2Ul/EYTrQ1CLPs5EgEVupdtACLDk6NfbBw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:16.170210Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.0775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97ce6436e28575250c0e8dc910f0fb234dbae7d23b3e012ae34d1d43f510ae1c","sha256:b81595bfbff8355ce16494f0d5b0b86b6858057721f721801838daeef0354359"],"state_sha256":"c85ec2a8e35177900af39d9bc313e3a640e04c89095deebaa262ff263b3c703f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+giTNwGnebTLVjTiE2XTbVd+YllIU+8bqIvYXU2caWjDRFvGxEyQhM7Ohu7CC6q6+jVnIMWYm9kbElMof1Q2DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T02:43:00.759879Z","bundle_sha256":"7276e76f5da32eea66c09d9f7f223c22f1f4ce0cd94d607fb7778f5f8ecd644c"}}