{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:O5S2WIAJR4AMNLEG6KSQCMCLKQ","short_pith_number":"pith:O5S2WIAJ","canonical_record":{"source":{"id":"2408.02962","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-06T05:16:40Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"33cf1988958cb67e3b1c7ce55cd4820f43a4547e174c7bd930c063897c73d158","abstract_canon_sha256":"1ba0162411480f5bcdd9846f650c8caac4e1cd7808c86089a8e2d91dfcb7ac57"},"schema_version":"1.0"},"canonical_sha256":"7765ab20098f00c6ac86f2a501304b54063e62fdf1f7d676c2cd53568eaf737a","source":{"kind":"arxiv","id":"2408.02962","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.02962","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"arxiv_version","alias_value":"2408.02962v1","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.02962","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_12","alias_value":"O5S2WIAJR4AM","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_16","alias_value":"O5S2WIAJR4AMNLEG","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_8","alias_value":"O5S2WIAJ","created_at":"2026-07-05T08:52:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:O5S2WIAJR4AMNLEG6KSQCMCLKQ","target":"record","payload":{"canonical_record":{"source":{"id":"2408.02962","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-06T05:16:40Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"33cf1988958cb67e3b1c7ce55cd4820f43a4547e174c7bd930c063897c73d158","abstract_canon_sha256":"1ba0162411480f5bcdd9846f650c8caac4e1cd7808c86089a8e2d91dfcb7ac57"},"schema_version":"1.0"},"canonical_sha256":"7765ab20098f00c6ac86f2a501304b54063e62fdf1f7d676c2cd53568eaf737a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:52:43.015731Z","signature_b64":"hI87qJbYIN1KkneDu5bxswgTWIXqwK68woMJO3XNJjNPrs9Du41mxuVLJXatf868+bFKJhy6dMO2Bk77/4rbAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7765ab20098f00c6ac86f2a501304b54063e62fdf1f7d676c2cd53568eaf737a","last_reissued_at":"2026-07-05T08:52:43.015135Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:52:43.015135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.02962","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":"2026-07-05T08:52:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v1L8If549Foz7EymVG0vT86Ea/qyjWoxZOgPR3fh7rjv2Rj79SYtBo2E2g8Hpdx0AgsOHhjlOT0LGn6Fuq6oDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:53:40.261589Z"},"content_sha256":"0d2f0ad9656c9971822602d3d26b91368a96a133ba541408557baad3b82b56c0","schema_version":"1.0","event_id":"sha256:0d2f0ad9656c9971822602d3d26b91368a96a133ba541408557baad3b82b56c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:O5S2WIAJR4AMNLEG6KSQCMCLKQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FAST detection of OH emission in the carbon-rich planetary nebula NGC 7027","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Albert Zijlstra, Chuan-Peng Zhang, Hai-Hua Qiao, Hao-Min Sun, Jun-ichi Nakashima, Peng Jiang, Xiao-Hu Li, Xi Chen, Xu-Jia Ouyang, Xu-Ying Zhang, Yong Zhang","submitted_at":"2024-08-06T05:16:40Z","abstract_excerpt":"We present the first detection of the ground-state OH emission line at 1612 MHz toward the prototypical carbon-rich planetary nebula (PN) NGC 7027, utilizing the newly installed ultra-wideband (UWB) receiver of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). This emission is likely to originate from the interface of the neutral shell and the ionized region. The other three ground-state OH lines at 1665, 1667, and 1721 MHz are observed in absorption and have velocities well matched with that of HCO$^+$ absorption. We infer that the OH absorption is from the outer shell of NGC "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.02962","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/2408.02962/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":"2026-07-05T08:52:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F8qbOwlSQ6/2Ot5VW0EnUgb2vRfaEIXQ8sPYGqCYcVRzIUy7h67XJjlvGqB+W98FZpJWtun9VXpcdmYwFI6iBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T01:53:40.262113Z"},"content_sha256":"1200607ea8c5a2ee365ee723e1fcce41e24732bce90dc2c17193150fef4e6194","schema_version":"1.0","event_id":"sha256:1200607ea8c5a2ee365ee723e1fcce41e24732bce90dc2c17193150fef4e6194"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/bundle.json","state_url":"https://pith.science/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/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":"2026-08-07T01:53:40Z","links":{"resolver":"https://pith.science/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ","bundle":"https://pith.science/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/bundle.json","state":"https://pith.science/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O5S2WIAJR4AMNLEG6KSQCMCLKQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:O5S2WIAJR4AMNLEG6KSQCMCLKQ","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":"1ba0162411480f5bcdd9846f650c8caac4e1cd7808c86089a8e2d91dfcb7ac57","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-06T05:16:40Z","title_canon_sha256":"33cf1988958cb67e3b1c7ce55cd4820f43a4547e174c7bd930c063897c73d158"},"schema_version":"1.0","source":{"id":"2408.02962","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.02962","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"arxiv_version","alias_value":"2408.02962v1","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.02962","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_12","alias_value":"O5S2WIAJR4AM","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_16","alias_value":"O5S2WIAJR4AMNLEG","created_at":"2026-07-05T08:52:43Z"},{"alias_kind":"pith_short_8","alias_value":"O5S2WIAJ","created_at":"2026-07-05T08:52:43Z"}],"graph_snapshots":[{"event_id":"sha256:1200607ea8c5a2ee365ee723e1fcce41e24732bce90dc2c17193150fef4e6194","target":"graph","created_at":"2026-07-05T08:52:43Z","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/2408.02962/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first detection of the ground-state OH emission line at 1612 MHz toward the prototypical carbon-rich planetary nebula (PN) NGC 7027, utilizing the newly installed ultra-wideband (UWB) receiver of the Five-hundred-meter Aperture Spherical radio Telescope (FAST). This emission is likely to originate from the interface of the neutral shell and the ionized region. The other three ground-state OH lines at 1665, 1667, and 1721 MHz are observed in absorption and have velocities well matched with that of HCO$^+$ absorption. We infer that the OH absorption is from the outer shell of NGC ","authors_text":"Albert Zijlstra, Chuan-Peng Zhang, Hai-Hua Qiao, Hao-Min Sun, Jun-ichi Nakashima, Peng Jiang, Xiao-Hu Li, Xi Chen, Xu-Jia Ouyang, Xu-Ying Zhang, Yong Zhang","cross_cats":["astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-06T05:16:40Z","title":"FAST detection of OH emission in the carbon-rich planetary nebula NGC 7027"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.02962","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":"sha256:0d2f0ad9656c9971822602d3d26b91368a96a133ba541408557baad3b82b56c0","target":"record","created_at":"2026-07-05T08:52:43Z","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":"1ba0162411480f5bcdd9846f650c8caac4e1cd7808c86089a8e2d91dfcb7ac57","cross_cats_sorted":["astro-ph.SR"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-08-06T05:16:40Z","title_canon_sha256":"33cf1988958cb67e3b1c7ce55cd4820f43a4547e174c7bd930c063897c73d158"},"schema_version":"1.0","source":{"id":"2408.02962","kind":"arxiv","version":1}},"canonical_sha256":"7765ab20098f00c6ac86f2a501304b54063e62fdf1f7d676c2cd53568eaf737a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7765ab20098f00c6ac86f2a501304b54063e62fdf1f7d676c2cd53568eaf737a","first_computed_at":"2026-07-05T08:52:43.015135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:52:43.015135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hI87qJbYIN1KkneDu5bxswgTWIXqwK68woMJO3XNJjNPrs9Du41mxuVLJXatf868+bFKJhy6dMO2Bk77/4rbAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:52:43.015731Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.02962","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d2f0ad9656c9971822602d3d26b91368a96a133ba541408557baad3b82b56c0","sha256:1200607ea8c5a2ee365ee723e1fcce41e24732bce90dc2c17193150fef4e6194"],"state_sha256":"74edd889faaa70705cef12d8b26750497448e558aa65d06f6686f6d38005b8f9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NbD5s/AxDIHG6LrAxgP1Jhr8U4SARrSos/xFuOM/L57RXfK1FhmFu7E3YZAV7hGAoDKBZF9moNmAFjotA46wDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T01:53:40.265872Z","bundle_sha256":"4b2e6f18e9e6c91068fabbc49d5476fda5c87a835a1faa532a57543c73091c30"}}