{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:AG4VVJKTGNT7FE3D3FD7YBGNZG","short_pith_number":"pith:AG4VVJKT","canonical_record":{"source":{"id":"1002.2362","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-11T15:40:48Z","cross_cats_sorted":[],"title_canon_sha256":"e8befb7b708c9a03767543d17562816bbf8d62b0359834d293c146f8e818d92f","abstract_canon_sha256":"a44572ff0aad0470bc75cfeec6d2fd39df36d39ddff79ee1dfa18e987ca76117"},"schema_version":"1.0"},"canonical_sha256":"01b95aa5533367f29363d947fc04cdc995e7a6ee3e097c6b7a1d4fba1899d86c","source":{"kind":"arxiv","id":"1002.2362","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2362","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2362v1","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2362","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"AG4VVJKTGNT7","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"AG4VVJKTGNT7FE3D","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"AG4VVJKT","created_at":"2026-05-18T12:26:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:AG4VVJKTGNT7FE3D3FD7YBGNZG","target":"record","payload":{"canonical_record":{"source":{"id":"1002.2362","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-11T15:40:48Z","cross_cats_sorted":[],"title_canon_sha256":"e8befb7b708c9a03767543d17562816bbf8d62b0359834d293c146f8e818d92f","abstract_canon_sha256":"a44572ff0aad0470bc75cfeec6d2fd39df36d39ddff79ee1dfa18e987ca76117"},"schema_version":"1.0"},"canonical_sha256":"01b95aa5533367f29363d947fc04cdc995e7a6ee3e097c6b7a1d4fba1899d86c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:09.284876Z","signature_b64":"6VfFotcXrBJ9N/FkhLIk2bxeV6zkCbzznSrf0686ib0yldVag9YUvoWYImh+R4Pyppw6J57vNaTzoHixBBcJCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01b95aa5533367f29363d947fc04cdc995e7a6ee3e097c6b7a1d4fba1899d86c","last_reissued_at":"2026-05-18T02:09:09.284291Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:09.284291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.2362","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":"2026-05-18T02:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KO4o/omKZJ9zyDzbCawov4/zddSYTva1mvRRKoxl4GYcDMXyTJWyA4j8yQISnj10WL3TB/o+AzuywwKH9JqbDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:34:28.310118Z"},"content_sha256":"d0c11d702bb31f9b18e1fb723ce917dec86c8f4ae140a4230fef6dcc8fbbe761","schema_version":"1.0","event_id":"sha256:d0c11d702bb31f9b18e1fb723ce917dec86c8f4ae140a4230fef6dcc8fbbe761"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:AG4VVJKTGNT7FE3D3FD7YBGNZG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Complex Structure in Class 0 Protostellar Envelopes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Hsin-Fang Chiang, John J. Tobin, Lee Hartmann, Leslie W. Looney","submitted_at":"2010-02-11T15:40:48Z","abstract_excerpt":"We use archived IRAC images from the Spitzer Space Telescope to show that many Class 0 protostars exhibit complex, irregular, and non-axisymmetric structure within their dusty envelopes. Our 8 $\\mu$m extinction maps probe some of the densest regions in these protostellar envelopes. Many of the systems are observed to have highly irregular and non-axisymmetric morphologies on scales >= 1000 AU, with a quarter of the sample exhibiting filamentary or flattened dense structures. Complex envelope structure is observed in regions spatially distinct from outflow cavities, and the densest structures o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2362","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":"2026-05-18T02:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M3YTOcZHsaUb9eHDwXgNHR8aYEdaWlC3TwAMUtsZZ4Jppg5+rD+p77qbkrgcMYQjGANliSdfl6epY1Qv0BQbCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T22:34:28.310492Z"},"content_sha256":"7a0e0328fa3f3c1bba839ef3dd52a08eea6edb602c2f807e58ae61b5ca455470","schema_version":"1.0","event_id":"sha256:7a0e0328fa3f3c1bba839ef3dd52a08eea6edb602c2f807e58ae61b5ca455470"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/bundle.json","state_url":"https://pith.science/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/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":"2026-06-03T22:34:28Z","links":{"resolver":"https://pith.science/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG","bundle":"https://pith.science/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/bundle.json","state":"https://pith.science/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AG4VVJKTGNT7FE3D3FD7YBGNZG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:AG4VVJKTGNT7FE3D3FD7YBGNZG","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":"a44572ff0aad0470bc75cfeec6d2fd39df36d39ddff79ee1dfa18e987ca76117","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-11T15:40:48Z","title_canon_sha256":"e8befb7b708c9a03767543d17562816bbf8d62b0359834d293c146f8e818d92f"},"schema_version":"1.0","source":{"id":"1002.2362","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2362","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2362v1","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2362","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"AG4VVJKTGNT7","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"AG4VVJKTGNT7FE3D","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"AG4VVJKT","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:7a0e0328fa3f3c1bba839ef3dd52a08eea6edb602c2f807e58ae61b5ca455470","target":"graph","created_at":"2026-05-18T02:09:09Z","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":"We use archived IRAC images from the Spitzer Space Telescope to show that many Class 0 protostars exhibit complex, irregular, and non-axisymmetric structure within their dusty envelopes. Our 8 $\\mu$m extinction maps probe some of the densest regions in these protostellar envelopes. Many of the systems are observed to have highly irregular and non-axisymmetric morphologies on scales >= 1000 AU, with a quarter of the sample exhibiting filamentary or flattened dense structures. Complex envelope structure is observed in regions spatially distinct from outflow cavities, and the densest structures o","authors_text":"Hsin-Fang Chiang, John J. Tobin, Lee Hartmann, Leslie W. Looney","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-11T15:40:48Z","title":"Complex Structure in Class 0 Protostellar Envelopes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2362","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:d0c11d702bb31f9b18e1fb723ce917dec86c8f4ae140a4230fef6dcc8fbbe761","target":"record","created_at":"2026-05-18T02:09:09Z","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":"a44572ff0aad0470bc75cfeec6d2fd39df36d39ddff79ee1dfa18e987ca76117","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-02-11T15:40:48Z","title_canon_sha256":"e8befb7b708c9a03767543d17562816bbf8d62b0359834d293c146f8e818d92f"},"schema_version":"1.0","source":{"id":"1002.2362","kind":"arxiv","version":1}},"canonical_sha256":"01b95aa5533367f29363d947fc04cdc995e7a6ee3e097c6b7a1d4fba1899d86c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01b95aa5533367f29363d947fc04cdc995e7a6ee3e097c6b7a1d4fba1899d86c","first_computed_at":"2026-05-18T02:09:09.284291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:09.284291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6VfFotcXrBJ9N/FkhLIk2bxeV6zkCbzznSrf0686ib0yldVag9YUvoWYImh+R4Pyppw6J57vNaTzoHixBBcJCw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:09.284876Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.2362","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d0c11d702bb31f9b18e1fb723ce917dec86c8f4ae140a4230fef6dcc8fbbe761","sha256:7a0e0328fa3f3c1bba839ef3dd52a08eea6edb602c2f807e58ae61b5ca455470"],"state_sha256":"b17d43be06317bc9fc0cd3b7a6a00e8a80b73c715a378053801439f6550837b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nl0WrfS6Ox0qk4leaeKLSfGg8nFiW/POCB/Wde8yiNq/B46YXfVGL8nxGAo7mrxvxJl7znEVSeFqcS2jmJJoCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T22:34:28.312439Z","bundle_sha256":"9046a366d1f9a5c7a5e9eb1ecd95d5d90cf85121f521d58b98f54f0b74f674aa"}}