{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FXB5YFF7T2TV6GC7T6TJGVTABW","short_pith_number":"pith:FXB5YFF7","canonical_record":{"source":{"id":"2008.13635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-31T14:16:54Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5b12c297e82f41a854f28ec7d6aedfa36c3d4cbf7e2fabf33178e0dc7c8ccc3b","abstract_canon_sha256":"a1d27c9cc608ff296e6385dcc5a46e4575632e387a0aa12f039ab8b2f2d737d5"},"schema_version":"1.0"},"canonical_sha256":"2dc3dc14bf9ea75f185f9fa69356600db236d66e9bb007df970a6c71234c3019","source":{"kind":"arxiv","id":"2008.13635","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.13635","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"arxiv_version","alias_value":"2008.13635v1","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.13635","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_12","alias_value":"FXB5YFF7T2TV","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_16","alias_value":"FXB5YFF7T2TV6GC7","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_8","alias_value":"FXB5YFF7","created_at":"2026-07-05T01:46:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FXB5YFF7T2TV6GC7T6TJGVTABW","target":"record","payload":{"canonical_record":{"source":{"id":"2008.13635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-31T14:16:54Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5b12c297e82f41a854f28ec7d6aedfa36c3d4cbf7e2fabf33178e0dc7c8ccc3b","abstract_canon_sha256":"a1d27c9cc608ff296e6385dcc5a46e4575632e387a0aa12f039ab8b2f2d737d5"},"schema_version":"1.0"},"canonical_sha256":"2dc3dc14bf9ea75f185f9fa69356600db236d66e9bb007df970a6c71234c3019","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:46:25.270930Z","signature_b64":"BRwr2TEPkEn6ri74CO3DOayABb2fGrQUpwuTZR64ObWDTOuoCojZHJVXtNxwWM9QwYjUJ83FzlMxhZvOCCnEAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2dc3dc14bf9ea75f185f9fa69356600db236d66e9bb007df970a6c71234c3019","last_reissued_at":"2026-07-05T01:46:25.270528Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:46:25.270528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.13635","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":"2026-07-05T01:46:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"izV6nVuWPFzZb/WwkMWN7X31HEfatiK4S309N1P16Mg2yHIbhzHzhmkrDXgohlUzU/pukHT45UxDzqN/duRoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:53:36.939626Z"},"content_sha256":"71198b5a477d4822c953f2d1f0e6d48263947356b15fc407ff4f07960a7ba26c","schema_version":"1.0","event_id":"sha256:71198b5a477d4822c953f2d1f0e6d48263947356b15fc407ff4f07960a7ba26c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FXB5YFF7T2TV6GC7T6TJGVTABW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Survey of 3 to 5.4 Micron Emission From Planetary Nebulae using SOFIA/FLITECAM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"5, E. E. Becklin, Elizabeth Fletcher, Erin C. Smith, Ian S. McLean, Maureen Savage, Ryan T. Hamilton, Sachindev Shenoy, Sarah E. Logsdon, William D. Vacca","submitted_at":"2020-08-31T14:16:54Z","abstract_excerpt":"Here we present the results of an airborne 3-5.4$\\mu$m spectroscopic study of three young, Carbon-rich planetary nebulae IC 5117, PNG 093.9-00.1, and BD $+$30 3639. These observations were made using the grism spectroscopy mode of the FLITECAM instrument during airborne science operations onboard NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA). The goal of this study is to characterize the 3.3 $\\mu$m and 5.25 $\\mu$m PAH dust emission in planetary nebulae and study the evolution of PAH features within evolved stars before their incorporation into new stellar systems in star-form"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.13635","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/2008.13635/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":"2026-07-05T01:46:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ima+SAdNuJMyv8p5o1AeXDISuRZbU0CSp0ulCq5L1MrGqb7zSFmGSCxsMkHQz6KET/MUZrWuIjchoxQqH57zCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T19:53:36.940211Z"},"content_sha256":"c38584e7206ccbcc7cba2f8e6acfe4adc92042a19a753330978194b7eebe143e","schema_version":"1.0","event_id":"sha256:c38584e7206ccbcc7cba2f8e6acfe4adc92042a19a753330978194b7eebe143e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/bundle.json","state_url":"https://pith.science/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/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":"2026-08-12T19:53:36Z","links":{"resolver":"https://pith.science/pith/FXB5YFF7T2TV6GC7T6TJGVTABW","bundle":"https://pith.science/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/bundle.json","state":"https://pith.science/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FXB5YFF7T2TV6GC7T6TJGVTABW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FXB5YFF7T2TV6GC7T6TJGVTABW","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":"a1d27c9cc608ff296e6385dcc5a46e4575632e387a0aa12f039ab8b2f2d737d5","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-31T14:16:54Z","title_canon_sha256":"5b12c297e82f41a854f28ec7d6aedfa36c3d4cbf7e2fabf33178e0dc7c8ccc3b"},"schema_version":"1.0","source":{"id":"2008.13635","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.13635","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"arxiv_version","alias_value":"2008.13635v1","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.13635","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_12","alias_value":"FXB5YFF7T2TV","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_16","alias_value":"FXB5YFF7T2TV6GC7","created_at":"2026-07-05T01:46:25Z"},{"alias_kind":"pith_short_8","alias_value":"FXB5YFF7","created_at":"2026-07-05T01:46:25Z"}],"graph_snapshots":[{"event_id":"sha256:c38584e7206ccbcc7cba2f8e6acfe4adc92042a19a753330978194b7eebe143e","target":"graph","created_at":"2026-07-05T01:46:25Z","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/2008.13635/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Here we present the results of an airborne 3-5.4$\\mu$m spectroscopic study of three young, Carbon-rich planetary nebulae IC 5117, PNG 093.9-00.1, and BD $+$30 3639. These observations were made using the grism spectroscopy mode of the FLITECAM instrument during airborne science operations onboard NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA). The goal of this study is to characterize the 3.3 $\\mu$m and 5.25 $\\mu$m PAH dust emission in planetary nebulae and study the evolution of PAH features within evolved stars before their incorporation into new stellar systems in star-form","authors_text":"5, E. E. Becklin, Elizabeth Fletcher, Erin C. Smith, Ian S. McLean, Maureen Savage, Ryan T. Hamilton, Sachindev Shenoy, Sarah E. Logsdon, William D. Vacca","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-31T14:16:54Z","title":"A Survey of 3 to 5.4 Micron Emission From Planetary Nebulae using SOFIA/FLITECAM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.13635","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":"sha256:71198b5a477d4822c953f2d1f0e6d48263947356b15fc407ff4f07960a7ba26c","target":"record","created_at":"2026-07-05T01:46:25Z","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":"a1d27c9cc608ff296e6385dcc5a46e4575632e387a0aa12f039ab8b2f2d737d5","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-08-31T14:16:54Z","title_canon_sha256":"5b12c297e82f41a854f28ec7d6aedfa36c3d4cbf7e2fabf33178e0dc7c8ccc3b"},"schema_version":"1.0","source":{"id":"2008.13635","kind":"arxiv","version":1}},"canonical_sha256":"2dc3dc14bf9ea75f185f9fa69356600db236d66e9bb007df970a6c71234c3019","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2dc3dc14bf9ea75f185f9fa69356600db236d66e9bb007df970a6c71234c3019","first_computed_at":"2026-07-05T01:46:25.270528Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:46:25.270528Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BRwr2TEPkEn6ri74CO3DOayABb2fGrQUpwuTZR64ObWDTOuoCojZHJVXtNxwWM9QwYjUJ83FzlMxhZvOCCnEAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:46:25.270930Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.13635","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71198b5a477d4822c953f2d1f0e6d48263947356b15fc407ff4f07960a7ba26c","sha256:c38584e7206ccbcc7cba2f8e6acfe4adc92042a19a753330978194b7eebe143e"],"state_sha256":"0532e735afbedebf24767bb8a19f81b4ca3a5a880cdd4c449da34be32637118c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r7Ja7F4JKVSNdmDKyr1M3ROJwl+fsFVMoA/VbEgenLclIdCrvidPNIabftfQU+VG+iA+G7R1HRGBNJTtdOSPAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T19:53:36.946736Z","bundle_sha256":"2d3f27917be2987a69749729963e1e003c2bd24c9780181b370f5c6f905329b8"}}